Powerplants => Olds Powered => Topic started by: olds403 on August 04, 2018, 06:02:03 AM

Title: 424 Oldsmobile Stroker 403
Post by: olds403 on August 04, 2018, 06:02:03 AM

Just picked up the 424 cubic inch stroked roller Oldsmobile 403 from the machine shop.  Took 20 months to get all the parts and machine this motor.  Did it twice. 

Not many out there like this one. 
Bored and Honed to .024 using torque plates
Decked to .008
Align honed and clearanced
Stroked 1967 olds 330 forged crank stroked to 3.510
Custom forged pistons by Racetec. 
Metric ring pack 1.5 mm 1.5mm 3.0mm
Scat small block chevy small journal rods 6inch
Custom lunati roller cam
Roller lifters
Halo girdle from J&S machine
Holley dominator intake cut and decked.

1970 small block 350 Heads bulit and ported by Champion Racing in Florida. 

Special thanks to Mark Remmel (CutlassEfii) on Realoldspower for all the parts.  Thanks to Precision Engines in Austin, Tx for all the time and efforts. 

There is a bunch of machine work and time test fiitting cranks and such.  There is thousands in machine work.  I stated two years back this would be a max effort 403 which is now a 424 cubic inch small block. 
 

(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/05E0C302-F009-4A93-8F9A-E05FF46A38C3_zpsiejgedki.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/05E0C302-F009-4A93-8F9A-E05FF46A38C3_zpsiejgedki.jpeg.html)

(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/81F8BF59-D416-4E45-B853-5B6EE09EE4AE_zpspvpoku3m.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/81F8BF59-D416-4E45-B853-5B6EE09EE4AE_zpspvpoku3m.jpeg.html)

(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/FC6E9903-7C92-4998-90C9-E3F0BECDF347_zpsez83dp5q.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/FC6E9903-7C92-4998-90C9-E3F0BECDF347_zpsez83dp5q.jpeg.html)


(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/E8F91D52-BDBA-4304-BA08-9804CB29AC07_zpswrndmfur.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/E8F91D52-BDBA-4304-BA08-9804CB29AC07_zpswrndmfur.jpeg.html)


Title: Re: 424 Oldsmobile Stroker 403
Post by: scarebird on August 04, 2018, 08:32:52 AM
I hope your Holley intake works better than the Torker I had on my 425 decades ago - quite the pig low end.

(https://static.summitracing.com/global/images/prod/xlarge/EDL-2730_SI_xl.jpg?rep=False)
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 04, 2018, 08:51:57 AM
The Holley small block dominator is the only single plane intake for the Oldsmobile that was made.  Long out of production. Torker was not made for small blocks. I have a paper thin performer that 1lb of aluminum was ported out that I have on another car.    I am running a 298mm torque converter with fuel injection and the combo is well thought out.  Will all specs later and should not be a pig.
Title: Re: 424 Oldsmobile Stroker 403
Post by: scarebird on August 04, 2018, 02:36:52 PM
I hope so - my 425 had ported heads, headers, M21, 3.90 and a Mondello cam.  Eddy later made a T2 for the BBO IIRC that supposedly ran much better.
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 04, 2018, 04:57:37 PM
The dominator runners are narrow which slows the port velocity.  The cam is 227/232 @.050 with .561 intake and .551 exhaut on 112 center. 
Title: Re: 424 Oldsmobile Stroker 403
Post by: scarebird on August 04, 2018, 08:21:18 PM
mnnh, the Torker had big runners - too big
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 05, 2018, 08:33:43 AM
(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/4E1617BF-EE81-42BF-97F0-DB91B6256788_zpstitojleh.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/4E1617BF-EE81-42BF-97F0-DB91B6256788_zpstitojleh.jpeg.html)
Title: Re: 424 Oldsmobile Stroker 403
Post by: scarebird on August 05, 2018, 09:35:45 AM
excellent.  the other thing i remember were the inner bolts were a bugger to get in, yours look much easier.
Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on August 10, 2018, 03:31:52 PM
Okay, I see you have a 3.510 Stroke Crankshaft to yield 424 ci.  Does anyone know if anyone has taken a 4" crankshaft and put it in a .030 over 403, to yield 482 cubes?  This would be 4.381 Bore X 4" Stroke.  Years back they used to take Olds 350 Diesel Blocks and then take a 3.975" Crankshaft from a late 60's (maybe 1967) Olds 400 or 425 big blocks, and then cross-mill the 3.975" crankshaft to make a 4" crankshaft for a Small Block Olds.  For an Olds 350, you could get around 440ci.  Question is, can you fit a 4" crankshaft in a 403 to result in a 482ci small block, without anyone pointing out that the 403 has windowed webs? 

also, on this 424ci, will you have dyno numbers available in the future?  What is the compression? 
Title: Re: 424 Oldsmobile Stroker 403
Post by: tribute on August 10, 2018, 08:32:34 PM
Just when I thought my 421 stroker was risky from my 403 :)  Mine has tons of torque and power.  Excited to see what you end up with from this build.
Title: Re: 424 Oldsmobile Stroker 403
Post by: jonathonar89 on August 10, 2018, 09:12:54 PM
This is an awesome build for sure!

I've always wanted to see someone utilize the Olds 307 computer controlled distributor and GM TBI on one this type of build.
Title: Re: 424 Oldsmobile Stroker 403
Post by: Aus78Formula on August 11, 2018, 03:28:57 AM
Wicked engine. I wish I'd done something similar with mine, it was certainly the plan but there was no engine guy or parts suppliers who took much interest so I ended up with something that cost a fortune for mediocre outcome. Disappointing all round, hard to argue with the anti 403 crowd. But this one sticks it to them.
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 14, 2018, 09:32:20 PM
Funny someone asked about the 4” stroke crankshaft.  I have one new billet.  I won’t put it in a 403.  It will go into an Olds Diesel block.  Yes, you can take a 425 olds crank and cut down the counterweights and fit it into the Olds Diesel.  I considered it.  Though its not as nice as a brand new billet and nearly the same cost.  I already got screwed on my stroked  330 used crank which cost me $750+ to get a virgin one stroked and narrowed for sbc rods and then another align hone on the block.  Not doing that again as Olds stuff is a fortune. 

To answer the above post on the 403 - the deck is .008.  The heads were cut to 63cc’s.  I am using cometic MLS head gaskets.  Compression calculations are 9:71.  I know approximately what the motor will do as modeled it after this one.  https://m.youtube.com/watch?v=3gwx36SQ3vs

That stroker 403 was done in Dallas Tx.  Just up from me.  Granted this, one has BB heads, but I put big valves in my heads and ported them to paper thin.  The choke point will be the intake/exhaust as That 424 is going into my Dad’s 10th Anniversary Trans Am and it will look all stock.  I actually need to tame this motor down.  The trans is rock solid and so is the rear. The details are in the restorations section of this forum

It was the last 403 we will build as it was a lot of time and money.  Everything was custom and was a lot more money than initially expected.  The machine work was done twice on the short block and heads were done twice too.  Lesson learned - used parts were junk and had to find replacements. 

No more 403’s will be built as I said last year.  Blocks are extremely hard to find and so are parts. Just sold a set of 350 #6 heads to the shop that did my motor.  Still have a set of forged TRW old stock new inbox pistons .030 and a set of KB’s that I will sell as well.  Probably have a set of 4’s, 5’s amd 6’s that are good heads too.  Just have to check inventory.  Have an old set of 4A’s I have pocked ported i the 80’s that need to go too.  Plus a new custom erson cam setup for a mild 350HP build that has to go too.

thanks. Mike

Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 14, 2018, 10:16:39 PM
This is the 4” small block billet crank - No you WILL NOT find one anywhere online.  Its a game changer as now as any small block Olds can push 425+ cubes and 500HP.  Its not a joke.  I have this crank.  Just find an Olds 350 and make HP.  403 will be 482 cu in.  Not recommended. 

Go on classicOldsmobile.com and talk to cutlassefi.  aka Mark Remmel.  Mark is very helpful and patient.  All the parts and head work Mark has done for me.  Not cheap...

(http://i6.photobucket.com/albums/y219/olds403/5ECB8E0F-6905-4057-97A8-0BDE528333EC_zpsr4gykywu.jpeg) (http://s6.photobucket.com/user/olds403/media/5ECB8E0F-6905-4057-97A8-0BDE528333EC_zpsr4gykywu.jpeg.html)

Title: Re: 424 Oldsmobile Stroker 403
Post by: Dr87 on August 15, 2018, 10:10:16 AM
This is the 4” small block billet crank - No you WILL NOT find one anywhere online.  Its a game changer as now as any small block Olds can push 425+ cubes and 500HP.  Its not a joke.  I have this crank.  Just find an Olds 350 and make HP.  403 will be 482 cu in.  Not recommended. 

Go on classicOldsmobile.com and talk to cutlassefi.  aka Mark Remmel.  Mark is very helpful and patient.  All the parts and head work Mark has done for me.  Not cheap...

(http://i6.photobucket.com/albums/y219/olds403/5ECB8E0F-6905-4057-97A8-0BDE528333EC_zpsr4gykywu.jpeg) (http://s6.photobucket.com/user/olds403/media/5ECB8E0F-6905-4057-97A8-0BDE528333EC_zpsr4gykywu.jpeg.html)
Marks crank would make killer power in a 403! Would you not recommend it even with a girdled bottom end?
Title: Re: 424 Oldsmobile Stroker 403
Post by: lugnuts on August 15, 2018, 08:07:37 PM
nice build, sounds expensive.

I am finally getting back to working on my car and plan on building/having the motor built this winter. J&S are somewhat local to me so debating having him build it. is it possible to get 400-500 hp out of it at a reasonable cost?
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 15, 2018, 11:59:22 PM
400 hp is easy.  KB pistons,  BB heads, RPM intake, and good cam.  This would not be terrible on the budget.  Define reasonable? 

Yes, the stroker 403 was expensive as nothing was off the sheld - well maybe the scat chevy rods since chevy parts are cheaper by a 2x to 3x factor. 

It would have been about $1500 less if the first crank would have worked out and not doing it twice.  Mind you, its not just the crank...it’s another align hone for the replacement crank plus balance job too.  Everything on this build was custom (crank, pistons, rings, and roller cam) which makes it quite a bit more money. 






Title: Re: 424 Oldsmobile Stroker 403
Post by: lugnuts on August 17, 2018, 12:44:12 PM
400 hp is easy.  KB pistons,  BB heads, RPM intake, and good cam.  This would not be terrible on the budget.  Define reasonable? 

ideally I'd like to be in the 5-6k range or less but don't want to go over 8k
Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on August 17, 2018, 03:50:51 PM
Let's see, I think you mentioned in this thread that you have 1970 small block heads, so I assume that these are #6 Heads.  You mentioned that they have been milled down to 63cc and that the compression of your 403 (now 424ci) will be 9.7:1.  Have you had these heads flowed, and if so, what is the CFM at .500 lift and at .600 lift for the intake and exhaust?  Also, what size intake and exhaust valves are in these Heads?  2.00?  2.07?
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 17, 2018, 07:04:50 PM
Yes, 6’s

Machined and built by Champion Racing Heads in Florida speced by Mark Remmel
Very impressed with the work. While not all out like my #4's the work was solid!
#6 Olds 350 heads.   valves 2.125 intake 1.68 exhaust.
Hard seats installed, egr bump ground off, bowl porting, filled crossovers. welded center dividers, cut to 64cc, pc seals. Dual springs 350 lb for roller cam.  Casting look new!
Mind you they are 47 years old !

100    71.        53
.200.  133.     101
.300.  200.    127
.400.  231.     138
.500.  244.    154
.600.  254.    164
.700.  260.     169
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 18, 2018, 09:17:29 PM
Long day

(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/BFBDDDAA-690B-48B0-8A96-83A96E0E30C3_zpszcdtxit2.png) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/BFBDDDAA-690B-48B0-8A96-83A96E0E30C3_zpszcdtxit2.png.html)
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 19, 2018, 08:26:36 PM
Checking pushrods.  Stock is about .050 took long.  Ordered a set of Manley 8.200.  Everything is custom.  Measured and thought out.  Even had a set of 1/4 valve cover spacers made.  Stock look. 


(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/903A5316-4DCA-4B9D-8975-7D73F51142A1_zps90xwccvh.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/903A5316-4DCA-4B9D-8975-7D73F51142A1_zps90xwccvh.jpeg.html)

(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/12D0EA54-9DA5-4E5F-B7F4-DBB43709345D_zps5rl8s7i3.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/12D0EA54-9DA5-4E5F-B7F4-DBB43709345D_zps5rl8s7i3.jpeg.html)
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 19, 2018, 08:57:26 PM
400 hp is easy.  KB pistons,  BB heads, RPM intake, and good cam.  This would not be terrible on the budget.  Define reasonable? 

ideally I'd like to be in the 5-6k range or less but don't want to go over 8k

8k is about where you will end up.  Just depends on what you do on your own.  I have a set of KB’s new in box .039. 
Title: Re: 424 Oldsmobile Stroker 403
Post by: lugnuts on August 22, 2018, 07:58:15 PM
400 hp is easy.  KB pistons,  BB heads, RPM intake, and good cam.  This would not be terrible on the budget.  Define reasonable? 

ideally I'd like to be in the 5-6k range or less but don't want to go over 8k

8k is about where you will end up.  Just depends on what you do on your own.  I have a set of KB’s new in box .039. 

I was debating on building it myself or having J&S Machine do it. hes sort of local to me so I could have him build the motor but if I do it myself I can save some money
Title: Re: 424 Oldsmobile Stroker 403
Post by: 70RAIV455 on August 22, 2018, 08:32:49 PM
Okay, I see you have a 3.510 Stroke Crankshaft to yield 424 ci.  Does anyone know if anyone has taken a 4" crankshaft and put it in a .030 over 403, to yield 482 cubes?  This would be 4.381 Bore X 4" Stroke.  Years back they used to take Olds 350 Diesel Blocks and then take a 3.975" Crankshaft from a late 60's (maybe 1967) Olds 400 or 425 big blocks, and then cross-mill the 3.975" crankshaft to make a 4" crankshaft for a Small Block Olds.  For an Olds 350, you could get around 440ci.  Question is, can you fit a 4" crankshaft in a 403 to result in a 482ci small block, without anyone pointing out that the 403 has windowed webs? 

also, on this 424ci, will you have dyno numbers available in the future?  What is the compression?
An Olds 425 V8 has 3.000 inch diameter main journals. Larger than a 403.
The Thrust main checks are wider than a 403.
A 350 D Olds V8 has the Large 3.000 inch main journals.

So you can not physically drop a 425 V8 crank into a 403 block.

I have a 1965 Olds 425 Super Rocket V8 in my 1963 Pontiac Grand Prix.
Fit it with some minor work.
Runs like a bat out of hell on fire.
Moves the 4200 lb car effortless.
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on August 26, 2018, 07:41:37 PM
(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/33917A08-8B68-44C1-9988-B177CE9891FC_zpsk6pxxvqm.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/33917A08-8B68-44C1-9988-B177CE9891FC_zpsk6pxxvqm.jpeg.html)
Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on September 05, 2018, 04:30:57 PM
         424ci SBO is looking good.  Keep sending the pictures as you progress.  So, you have 424 cubic inches, 9.7:1 compression, 2.125" intake valves in 64cc #6 heads, and a cam that specs out with a Duration of 227/232 @.050 with Lift of .561 intake and .551 exhaust on 112 center.  Forget, is this a hydraulic roller?  I think you mentioned that the heads flow 244 @ .500 lift and 254 @ .600 lift.  So, if you do get .561 lift out of you cam, you should be right around a flow of 250 cfm on the intake side. 
         I think you mentioned that this is going in a 10th Anniversary TA.  Will this engine have headers and perhaps a Pypes 2 1/2" Dual Exhaust?  What Carburetor do you plan to use and cfm?  Any plans on timing?  Just curious what Horsepower and Torque numbers you hope to get with this combination. 
         Also, is this 424ci SBO being backed by a TH350?  What rear end ratio will the TA be running?                 
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on September 08, 2018, 12:21:52 PM
Hydraulic lunati roller.  200r4 billet transmission 298mm lock up converter  built by Dave Husek
3:23 rear end. 2.5 pypes with Thornton W/Z manifolds.  I have a set of super comp headers too, but going for a stock look and headers are there for later.  Need to keep it a bit tame for a while given it’s my Dads car.  The motor will easily put down 450hp and being that it’s stroked it will rev fast. 


The fuel system is a fuel injection system in tank with Fitech. 
Ignition is one of Rocky Rotella’s Sun Tuned HEI.  He did it for me about 15yrs ago. 
10th Anniversary Trans Am which is posted in the projects and restorations section
A lot has gone into this restoration.  No expense spared.  Doing it right
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on September 15, 2018, 07:19:50 PM
(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/A21A4F28-2538-48D0-A976-A7B0C9F3399C_zpsrhttvjkv.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/A21A4F28-2538-48D0-A976-A7B0C9F3399C_zpsrhttvjkv.jpeg.html)

Title: Re: 424 Oldsmobile Stroker 403
Post by: Aus78Formula on September 15, 2018, 09:33:12 PM
SD-424 ?!
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on September 16, 2018, 08:18:44 AM
Is that a Pontaic 455 ? No, olds 403 with a stroker crank, chevy rods, and custom pistons.  Sure it will start a conversation.  Considering I will be using a Pontiac 400 air cleaner housing.  This will get everyone confused. 

Honestly,  it was either Ford Blue or Pontiac blue from KBS.  So, went Pontiac blue.  Close enough to the genre and timeframe these cars were built.  Never said it was going to be 100 point restoration. 
Original 4WD brakes are gone now and so is the brake system.  All hydroboost with 1LE upfront and S10 brakes in the rear.  Sometimes, captain’s call. 
Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on September 17, 2018, 02:50:46 PM
Dude, you should reconsider that Paint choice!  Puke Blue?  LOL   :shock:  You should go with 1970-72 Oldsmobile Blue Metallic for the Block and then Pontiac Light Blue Metallic for the Valve Covers, Water Pump, and other accessories.  Just joking, you can paint it any color you want! 

So, are you going to dyno-test this bad boy before it goes in the car?  Or put it on a Chassis Dyno when everything is hooked up and ready to go?       
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on September 18, 2018, 08:17:22 AM
The motor took too long already and about 6 months behind given the machine shop delays/crank replacement.  The plan was to dyno the motor as would really like to know myself.  Though not important to the overall plan since its not going to be raced. 

The paint is what it is now and KBS piant shoots like an oil based paint then has a long cure time.  The valve covers were shot in GM corporate blue out off a rattle can.  The KBS paint will be on the block / intake for  life unless cooked / bead blasted off now. Not overly concerned about being the pontiac blue and it was either this or rattle can.  Rattle can lasts about a year at most and then burns/flakes off from my experience.  I suppose to be Era correct it should have been a gold painted Olds motor since  major parts used are 1967 or 1970 expect for the block. 
Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on October 19, 2018, 01:52:53 PM
Hey, it's been a month since the last update.  What's the latest on this Olds 403 / 424ci going together? 
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on October 21, 2018, 03:04:49 PM
Its in the car.  Exhaust is being done.
Title: Re: 424 Oldsmobile Stroker 403
Post by: via3d on October 24, 2018, 11:43:16 AM
This has been a joy to watch come together olds403. Thanks for the posts.

did you dyno?
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on November 06, 2018, 11:04:57 PM
Fuel system on

(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/DC8C8454-DBC1-4D8F-9B46-B14FB5873999_zpszhbd8ibt.png) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/DC8C8454-DBC1-4D8F-9B46-B14FB5873999_zpszhbd8ibt.png.html)
Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on November 13, 2018, 03:57:02 PM
What can you share about that FiTech Unit sitting on top of the 424ci SBO motor?  Since I have a Holley 750cfm Vacuum Secondary Carb on my 403,  I am curious how the FiTech works and how programmable/flexible it is to adjustments to make for a better running motor.  Are you able to dial in an AFR (Air-Fuel Ratio) around 14 or wherever a 403 runs best and produces the best vacuum at idle?  Can you elaborate on the pros and cons of this FiTech and what cfm it flows?  And, all the components (linkage, etc.,...) needed to make it work, going back to and from the Fuel Tank?     
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on November 14, 2018, 01:37:35 AM
I posted the FiTech a couple of years back when I ran one on another 403.  It’s basically a electric carburetor.  Starts up and idles no warm up..ect.  It has an O2 sensor that goes into the exhaust.  It has a self learn I pretty much left it alone since.  I think for all those pros/cons details look fitechs site or join their FB page.  Its not a complete EFI system with infinite options like an AEM ECU/Fast system.  By the time you get into something like AEM you are well beyond DIY.  FiTech are simple throttle body injection and DIY.  These a good option if you just want to bolt on and go.  Same can be likely done with a well tuned carb using a wide band sensor and enough dyno time. 

The fuel system is an efi tank with a walbro 255 fuel pump in the tank.  AN6 Fragola PTFE line from rear of tank to 3/8 Alum fuel line at the subframe and AN6 for the return back to tank.  At the Fitech there is a prefilter from Earls and that is AN6 with alum line to pushlock Fragola to AN6.  The biggest expense is the tank and all the lines and fittings.  Hard part was all the tube to AN adapters and making all the lines. 

The throttle bracket is a holley for 700r4 as I have a 200r4.  The linkage for it is all based on a holley so dont see any concerns.  Now, on a stock intake if you find my old post the TV/Detent hit the egr boss on the edelbrock performaner.  Ground the inake a bit. 

Right now I dont know what this 403 will do with this setup/Cam and how the FiTech will respond. 
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on November 18, 2018, 11:56:55 PM
Getting closer


(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/224397AA-1380-4BAB-B6D5-75817C9A1EEF_zps1wyg9v8h.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/224397AA-1380-4BAB-B6D5-75817C9A1EEF_zps1wyg9v8h.jpeg.html)
Title: Re: 424 Oldsmobile Stroker 403
Post by: lugnuts on November 19, 2018, 10:00:50 AM
I thought you were going with the smaller AC compressor?
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on November 19, 2018, 10:10:57 AM
This is my dad’s car.  The sanden went on my Red Trans am. I tend to be the guinea pig for test and mock ups. 

Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on January 08, 2019, 04:02:13 PM
any updates on this 424 Stroker 403 Olds Build? 
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on January 12, 2019, 10:32:35 PM
The shop is doing a 64 vette 427 swap.  We are scheduled at end of the
this month.  We also lost our painter to cancer so that changes the plan quite a bit. 
Title: Re: 424 Oldsmobile Stroker 403
Post by: Nexus on February 04, 2019, 03:22:18 PM
Hope things are well, and getting sorted out!!
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on February 10, 2019, 05:24:01 PM
It is Alive Feb 10, 2019


The expression on my Dad's face was worth the 18 months of hard work that everyone all put into this day. 
Would not have been possible without the help of the following:

My wife - thought she would have killed me by now. The countless trips to the machine shop, fed ex, ups, and phone calls.  Trips to the shop some 45 mins each way. 
My brother - for all the help along the way. 
My dad - who pulled this all together after 25 yrs. 
Restoration, Machine Shops and Suppliers. 
Jackson Racing
Precision Engines
Champion Racing Heads
J&S Machine
Mark Remmel - Cutlass EFI

The video is on YouTube as photobucket is worthless now

VIDEO LINK:
https://youtu.be/p4_oCtgfCDg


(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/1664BF26-9964-4593-92B7-BF109C304AA8_zpsqzqyv6yn.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/1664BF26-9964-4593-92B7-BF109C304AA8_zpsqzqyv6yn.jpeg.html)

(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/5F6DB681-5F1A-4376-B1A2-9A6EDACFFC48_zpsyujrcrla.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/5F6DB681-5F1A-4376-B1A2-9A6EDACFFC48_zpsyujrcrla.jpeg.html)

(http://i6.photobucket.com/albums/y219/olds403/10th%20Anniversary%20Restoration/5A0E5191-8DE7-4144-AC96-7519835AC40A_zpsrl2dlpxy.jpeg) (http://s6.photobucket.com/user/olds403/media/10th%20Anniversary%20Restoration/5A0E5191-8DE7-4144-AC96-7519835AC40A_zpsrl2dlpxy.jpeg.html)
Title: Re: 424 Oldsmobile Stroker 403
Post by: Aus78Formula on February 10, 2019, 06:05:14 PM
Fantastic!
Title: Re: 424 Oldsmobile Stroker 403
Post by: Jack on February 10, 2019, 06:50:42 PM
Sounds awesome.
Title: Re: 424 Oldsmobile Stroker 403
Post by: Nexus on February 11, 2019, 10:53:37 AM
Oh Yeah...that's a great sound!!!

Title: Re: 424 Oldsmobile Stroker 403
Post by: lugnuts on February 11, 2019, 11:43:53 AM
What a difference, can't wait to see what numbers this car puts down.
Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on April 08, 2019, 02:33:00 PM
Any plans to put this car on a Chassis Dyno and see how the rebuilt 403 (aka 424ci) does for HP and Torque, and what the RPM range is? 
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on April 11, 2019, 09:08:55 PM
Not with this one right now.  Give this until later this year.
Working on an extreme olds stroker small block.  I bought a 4” stroked crank last year ~ one of a dozen in existence.  Not much more to say...things are a bit slow now .
Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on May 28, 2019, 03:07:37 PM
Any updates on the 424ci build?  Chassis Dyno Tests?   Earlier, maybe on page one of this posting, you provided a UTube Video of an Olds 403 stroked to 422ci with what looks to be Edelbrock Aluminum Big Block Heads (in the video) and this 422ci Small block Olds put out 570 HP and 540 Torque on the dyno.  Now, they didn't provide all the info/specs on the engine in the video, but I've heard that the Edelbrock Olds Heads can flow 290 to 300 cfm right out of the box and I think your #6 Heads flow around 250 cfm.

Since you mentioned that your 424ci engine build is modeled after the 422ci in the video, are you suggesting that the 424ci build will generate 550 HP or better with 9.7:1 compression, small block heads that flow 250 cfm, and a hydraulic roller cam with 227/233 duration @ .050 and lift in the .560 range? 
   
Title: Re: 424 Oldsmobile Stroker 403
Post by: Nexus on May 28, 2019, 08:19:10 PM
^^^^^Good Question ^^^^^^^
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on May 30, 2019, 09:24:32 PM
The small blocks 6 heads flowed 244 / 154 at .500. 
Stock edelbrocks are basically Iron c heads.  They flowed 238/172 at .500 out of the box.  I had an early set of these and was playing with them for something else. 

That 424 won’t be chassis dyno’ed or see results for a while.  The shop guy had some health issues and will be lucky to see paint by end of the year.  This motor was done locally and wont be using them again.  If you get all the parts its a good build.  Though probably not very durable. 

When i get time I will post the LS Olds later in the year.  It will be an extreme motor. 

Title: Re: 424 Oldsmobile Stroker 403
Post by: Nexus on June 01, 2019, 12:34:51 AM
Waiting with anticipation!!!
Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on June 13, 2019, 03:08:12 PM
I have a few more questions about the Cam you are using in your 424ci SBO.  I think you stated that "The cam is 227/232 @.050 with .561 intake and .551 exhaust on 112 center".  My question pertains to how the engine runs and idles, and what type of vacuum the engine pulls with this Hydraulic Roller Cam, as it relates to power accessories.  A lot of 79 TAs have Power 4-wheel disc brakes, Powering Steering, and A/C.  Will the power accessories operate with this cam at idle?  Is there enough vacuum to operate Power Brakes at low RPM or idle?  Or would an electric vacuum pump or vacuum canister be needed with a Cam in the 230 @ .050 duration range?                                             
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on June 16, 2019, 10:44:03 AM
Hello, the cam is on 112 centers.  The car does not have power brakes- hydroboost. 
Its a custom made cam and it was a lunati.  The cam was spec’ed by Mark Remmel based on the combo and the heads/compression.  Its a lot smoother than you would think.  All the parts and heads cam from Mark minus the block machining that was done locally.  Its a big expense going roller as heads too need different springs. 

Just contact Mark ~ here is a link
https://classicoldsmobile.com/forums/big-blocks-2/mark-remmel-109733/
Title: Re: 424 Oldsmobile Stroker 403
Post by: kingwil on June 19, 2019, 04:29:58 PM
Thanks Olds403.  I've been following your thread and asking questions because I want to make some upgrades in the future to my car.  I have a 403 in a 79 TA that I rebuilt back in 1999 and made some mistakes along the way.  Haven't we all?  More on the mistakes, later.  First, the car specs and then the engine rebuild info:

1979 Firebird TA with 403/TH350 with 2.73 rear end with T-Tops and WS6 handling package with 4 wheel disc brakes and 15X8 Aluminum Snowflakes.  Power windows, power door locks, power brakes, power steering, and A/C.

Car over the years has been modified after I got it in 1986 after High School:

TH700R4 Automatic Overdrive in place of TH350.  2400 stall in TH700R4, race-prepped to handle 700HP.  B&M 4-Speed console Mega Shifter in place of factory 3-speed auto shifter.
4.10 posi 8.5" 10-bolt Differential in place of factory 2.73 10-bolt 8.5 diff.  4.10 posi rear end race-prepped and rated to handle 750HP
Competition Engineering bolt-in sub-frame connectors, welded in after bolted.
Southside Subframe Connectors welded on top of Competition Engineering bolt-in connectors.  * Sub-frame connectors added to strengthen the car with T-Tops.
Herb Adams VSE Solid Body Mounts
Hooker 4-pt Rally/Roll Bar
Herb Adams VSE Front Structure Kit.  This adds structure bars from the Firewall to the front control A-Arms and stiffens the front subframe.  Works well with the solid body mounts.  No flex in the front sub-frame.
Competition Engineering Traction Bars on the Back
15X8 WS6 Aluminum Snowflake Wheels with P255/60R15s front, and P275/60R15's in the Rear.

Engine Specs - some very similar to your 424ci build.  Intent was to create a W-31 403:

.030 over 403 - now 408ci.  TRW power-forged pistons with 20cc dish
#5 1969 W31 Heads milled to 62ccs with 2" intake and 1.625 exhaust valves
Heads flow 238 cfm @ .500 lift on intake and 161 cfm on exhaust
Rods resized
Torque Plate used on Block
Compression with Block decked to .020, is 9.6:1
3.385" Nodular Iron Crankshaft shotpeened and nitrided for extra hardness
Total Seal Rings, Michigan/Clevite 77 Bearings top to bottom
Mondello Oil Restrictors
Mondello Stud & Strap Kit
Mondello Windage Tray
Melling high-volume Oil Pump
Hydraulic Cam with 204/214 @ .050 duration and .450/.475 lift with roller-tip valve train
Headers and 2/1/2" Pypes Exhaust
Edelbrock Performer Intake Manifold
Holley 750 Vacuum Secondary
HEI Distributor rebuilt and re-curved with Accel Super Coil
K&N Filter with K&N Filter Top Plate

On a Chassis Dyno, on 3 pulls with timing set at 35, results were 269, 272, and 271 Net HP at the rear wheels.  Suggesting, that Engine HP at the crank may be around 340HP.   

This car does run 13's on the strip due to the TH700R4 having a 3.06:1 1st gear and the rear end being 4.10, which is significantly higher than a Car with a TH400 (2.48:1 1st gear) and 4.56 gears.  On the highway, with lockup, the final gear ratio is 2.89 on the TH700R4 / 4.10 posi combo.

Although some may consider this to be a minor engine build, the obvious weak point is the 204/214 Cam, which isn't that much higher than stock.  The Chassis Dyno results from 1999 also determined the 204/214 cam was too small, as peak power was in the 4200-4400 range.  Hence, this was the most glaring mistake in the Engine build.  But, a lot of the rest of the engine build, is similar to your 424ci. 

So, I am looking at everything from putting in a hydraulic roller cam closer to your specs of 227/233, to also considering a 3.77" custom billet crankshaft to increase the 403 to 455 cubes, or putting in a 4" crankshaft with 6" rods to yield 482ci, along with increasing flow on the #5 heads, to strengthening the bottom end.

I have no plans to remove the A/C, power steering, or power 4-wheel disc brakes from the car, or any other power accessories.  So, vacuum is very important to keep the power accessories going at idle or cruise RPM.  This is the reason I am asking about your 227/233 Hydraulic Roller Cam with .561 lift on 112 LSA.  Some people are suggesting that I might be able to get away with a hydraulic roller cam with 230/236 @ .050 duration with .530 lift and a LSA of 114.  And, add an electric vacuum pump.  Some are recommending a cam with 244 - 260 duration and lift from .550 to .620, forgetting that I am not yanking the A/C, Power Steering, and Power 4-Wheel Disc Brakes from the car.  But, the bigger cam recommendations are coming from those thinking I have a stripped down car, solely for racing.     

I will contact Mark Remmel and see what he says on the Cam.  Thanks again for your help. 
             
Title: Re: 424 Oldsmobile Stroker 403
Post by: olds403 on June 21, 2019, 01:39:03 PM
Lots of good information there and we are probably close in age.  Got my red TA in 1986 in high school. 

Couple of things.  Bigger cam and a rpm intake will wake it up.  You can put a bit more cam duration/lift into a roller setup, but you will need to redo your springs in heads along with knowing the installed heights of the valves so they don’t bind with more lift.  Just depends on how far you will be going.  Heads too probably will need a redo with roller.  Stock intake / ebrock performer will not clear roller lifters.  Only the Rpm and the old holley dominator.


Otherwise,  everything is a redo once you go beyond the cam change. 

Fyi, The early 350 olds blocks are better foundation for higher horse power as they are solid main as that is where the 4” cranks are going.  Which gets up to 434 cubic inch.  Mark may have a person putting a 4” crank into a 403, but lots of money gone should block fail.  I think the 403 would need a full girdle.  I don’t want to say what I am doing next - Mark may tell you that is fine and no one has ever done what I am planning.