2020-B4-2

Author Topic: 76 LS1 auto build thread  (Read 86559 times)

ryeguy2006a

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Re: 76 LS1 auto build thread
« Reply #280 on: July 11, 2019, 07:31:41 AM »
Looks like you have been busy, but no pictures?? Come on man.  :cool:

1976 Trans Am LS1, 6 speed, C5 Brakes, LS1 rear 12" brakes, and much more...SOLD
My Build: http://transamcountry.com/community/index.php?topic=24465.0

New project: 1968 Camaro LS6, T56, Speedtech, Hotchkis, DSE, Z51 13.4" front brakes, LS1 rear disks, etc.
http://transamcountry.com/community/index.php?topic=74591.0

duffinatur

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Re: 76 LS1 auto build thread
« Reply #281 on: July 22, 2019, 09:10:41 PM »
20190713_132437 by Elwood Duffey, on Flickr
20190713_132421 by Elwood Duffey, on Flickr
20190703_152356 by Elwood Duffey, on Flickr
20190630_185644 by Elwood Duffey, on Flickr
20180624_160024 by Elwood Duffey, on Flickr
20190713_132318 by Elwood Duffey, on Flickr
20190713_132326 by Elwood Duffey, on Flickr

I also just installed a new alternator and alternator relocation kit, pics to follow. This is a frequently driven car so the dust and dirt is terrible, but once the mechanics are dialed in...really dialed in...I'll detail the engine bay.
The relocation kit offered up some hose routing issues calling for new power steering lines and I had to move a steam pipe line, but overall a much nicer, cleaner install and easier access to everything.
76 Pontiac TA (long gone, first car)
69 Cadillac Eldorado (long gone)
00 HD Road King Classic
65 Pontiac GTO (gone, not forgotten)
67 Shelby AC Cobra replica (gone, winning shows still)
76 Trans Am LS1/4A TA (a recreation of my very first car)
74 Olds Cutlass Supr (status: on hold)
69 Pontiac Grand Prix (frame-off beginning soon)
Build: http://transamcountry.com/community/index.php?topic=57079.0

duffinatur

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Re: 76 LS1 auto build thread
« Reply #282 on: July 22, 2019, 09:33:50 PM »
Good update, did you ever have any luck with the cutlass?
No joy on the silver Cutlass. I stripped her down and bought another cleaner, rust free roller body 74 from AZ.
20180820_200539 by Elwood Duffey, on Flickr
It needed everything I had from the silver one: engine/trans, bumpers, etc.  wheels, odds-n-ends.
20181103_143034 by Elwood Duffey, on Flickr
So far I have the engine cleaned up and re-painted/installed and have begun some paint stripping.
But right now the T/A comes first.
76 Pontiac TA (long gone, first car)
69 Cadillac Eldorado (long gone)
00 HD Road King Classic
65 Pontiac GTO (gone, not forgotten)
67 Shelby AC Cobra replica (gone, winning shows still)
76 Trans Am LS1/4A TA (a recreation of my very first car)
74 Olds Cutlass Supr (status: on hold)
69 Pontiac Grand Prix (frame-off beginning soon)
Build: http://transamcountry.com/community/index.php?topic=57079.0

duffinatur

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Re: 76 LS1 auto build thread
« Reply #283 on: July 23, 2019, 03:24:24 PM »
20190723_165802 by Elwood Duffey, on Flickr

Alternator relocation bracket... cleaned up the area for a better hose routing of power steering hoses and
moved the alternator away from the elements and away from the crossover.
76 Pontiac TA (long gone, first car)
69 Cadillac Eldorado (long gone)
00 HD Road King Classic
65 Pontiac GTO (gone, not forgotten)
67 Shelby AC Cobra replica (gone, winning shows still)
76 Trans Am LS1/4A TA (a recreation of my very first car)
74 Olds Cutlass Supr (status: on hold)
69 Pontiac Grand Prix (frame-off beginning soon)
Build: http://transamcountry.com/community/index.php?topic=57079.0

scarebird

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Re: 76 LS1 auto build thread
« Reply #284 on: July 23, 2019, 05:39:41 PM »
Alternator relocation bracket... cleaned up the area for a better hose routing of power steering hoses and
moved the alternator away from the elements and away from the crossover.

I never understood the rationale of mounting the alternator low and chopping the cross member...

duffinatur

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Re: 76 LS1 auto build thread
« Reply #285 on: August 24, 2019, 11:56:21 PM »
So this happened... I repainted my header due to some stress cracking and found, after getting out in the sunlight, that
the paint doesn't quite match. It's really pronounced in person. Going to respray...again
20190824_180424 by Elwood Duffey, on Flickr

I also picked up a G8 GT.   So far it's fairly fun.  DOD delete, performance tune, catback exhaust.
20190807_185403-1 by Elwood Duffey, on Flickr
20190807_185324-1 by Elwood Duffey, on Flickr

I really thought I was out of luck finding this font but I found the last set I ordered. I'm just reall glad I didn't put it on until I checked
the color.
20190616_192720 by Elwood Duffey, on Flickr
76 Pontiac TA (long gone, first car)
69 Cadillac Eldorado (long gone)
00 HD Road King Classic
65 Pontiac GTO (gone, not forgotten)
67 Shelby AC Cobra replica (gone, winning shows still)
76 Trans Am LS1/4A TA (a recreation of my very first car)
74 Olds Cutlass Supr (status: on hold)
69 Pontiac Grand Prix (frame-off beginning soon)
Build: http://transamcountry.com/community/index.php?topic=57079.0

TATurbo

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Re: 76 LS1 auto build thread
« Reply #286 on: September 05, 2019, 09:10:42 PM »
What is that Alternator relocation bracket? 
I intend to add a turbo to my LS1 down the road, I anticipate I'll need the PS pump and Alternator moved up high to make room for some of the turbo pipes.  I currently have the stock 99F-body PS and Alternator location with AC up high on the passenger side. Your set-up looks like it's along the lines of what I'm picturing in my head.  I'll stash away any info you can provide...It'd be appreciated.
BTW, the TA looks sweet!
Tom
King of Prussia, PA

1981 Turbo Trans-Am
Build thread - http://transamcountry.com/community/index.php?topic=69897.0

duffinatur

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Re: 76 LS1 auto build thread
« Reply #287 on: September 05, 2019, 10:05:33 PM »
https://www.ebay.com/itm/LS-LQ4-LS1-Camaro-High-Mount-Alternator-bracket/161384617824?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

This is the one I bought from LS Brackets, part #LS0272.  Picked it up off Ebay a few years ago but just got
around to installing it this summer. Other places may carry it as well.
I did have to get new, longer power steering pump high pressure side line so be prepared for that.
I needed Gates K060750 belt, the one recommended was too long.
Really easy to install.
« Last Edit: September 05, 2019, 10:36:44 PM by duffinatur »
76 Pontiac TA (long gone, first car)
69 Cadillac Eldorado (long gone)
00 HD Road King Classic
65 Pontiac GTO (gone, not forgotten)
67 Shelby AC Cobra replica (gone, winning shows still)
76 Trans Am LS1/4A TA (a recreation of my very first car)
74 Olds Cutlass Supr (status: on hold)
69 Pontiac Grand Prix (frame-off beginning soon)
Build: http://transamcountry.com/community/index.php?topic=57079.0

scarebird

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Re: 76 LS1 auto build thread
« Reply #288 on: September 05, 2019, 11:34:40 PM »
This is the factory based kit, they have one for AC also:

https://paceperformance.com/i-6485405-19418441-cpp-accessory-drive-system-without-a-c-fits-ls2-ls3-ls7-engines.html



edit - noted this may not work with LS1's
« Last Edit: September 05, 2019, 11:36:36 PM by scarebird »

duffinatur

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Re: 76 LS1 auto build thread
« Reply #289 on: September 13, 2019, 09:10:21 PM »
Had my first Dyno-Tune today. Had a few unforeseen issues, but nothing insurmountable.
Have a few things to adjust and will need to go back in a few weeks.

1.
My Throttle Position Sensor is not correct which is causing a loud whistle at start up and idle issues.

2.
I recently changed my temp sensor to work with my Speedhut Gauges, but now the PCM isn't reading
that it exists, causing some really hard restarts. It's been too long and I can't remember if I ran it through
the PCM or straight to the gauge. Gonna have to dig into the loom a little and see how I ran the wire.

3.
My tuner thinks a speed density tune is the way to go... so it's base tuned this way right now, but won't idle well.
 I've got to do a little more research...
I've got a few updates to perform.

Will update again later..

20190913_122512 by Elwood Duffey, on Flickr
 
76 Pontiac TA (long gone, first car)
69 Cadillac Eldorado (long gone)
00 HD Road King Classic
65 Pontiac GTO (gone, not forgotten)
67 Shelby AC Cobra replica (gone, winning shows still)
76 Trans Am LS1/4A TA (a recreation of my very first car)
74 Olds Cutlass Supr (status: on hold)
69 Pontiac Grand Prix (frame-off beginning soon)
Build: http://transamcountry.com/community/index.php?topic=57079.0

Re: 76 LS1 auto build thread
« Reply #289 on: September 13, 2019, 09:10:21 PM »

Ryoko

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Re: 76 LS1 auto build thread
« Reply #290 on: September 14, 2019, 07:13:14 AM »
Speed-density at idle is tough to dial in due to the high level of intake pulsations.

duffinatur

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Re: 76 LS1 auto build thread
« Reply #291 on: September 21, 2019, 09:38:46 PM »
20190921_190340 by Elwood Duffey, on Flickr

My broken seat bracket has pushed me to finally begin installing these other seats I have.
I'm fabricating my own mounts to keep it low enough to keep the power function. I'll have to
see how that works. At least they look good.
76 Pontiac TA (long gone, first car)
69 Cadillac Eldorado (long gone)
00 HD Road King Classic
65 Pontiac GTO (gone, not forgotten)
67 Shelby AC Cobra replica (gone, winning shows still)
76 Trans Am LS1/4A TA (a recreation of my very first car)
74 Olds Cutlass Supr (status: on hold)
69 Pontiac Grand Prix (frame-off beginning soon)
Build: http://transamcountry.com/community/index.php?topic=57079.0

TATurbo

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Re: 76 LS1 auto build thread
« Reply #292 on: September 22, 2019, 08:10:15 PM »
Thanks for the alternator/PS pump mount info, I'll stash it away for later.  I'll do some research to make sure it'll work for my application, but it's good to have a starting point.
Those seats look really good in there.  IMHO a lot of swap seats look out of place.  Those look right at home. Nice!
Tom
King of Prussia, PA

1981 Turbo Trans-Am
Build thread - http://transamcountry.com/community/index.php?topic=69897.0

duffinatur

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Re: 76 LS1 auto build thread
« Reply #293 on: October 12, 2019, 11:41:02 PM »
So I was finally able to get a decent tune.
Spooltek Performance in LaPorte, IN did a great job of installing a better tune.
There was still a few minor issues they identified on the dyno that can easily be fixed later:
They are:
*Either a coil/plug wire has a crack or a coil is going bad - @WOT near the rev limiter there was some signal drop out on 1 cylinder.
  - I've already ordered a whole set of new coils.
  - It could be a bad plug as well - I have iridium plugs installed and have since learned copper plugs are better
*They also had a few recommendations:
  - I'm running 2:73 gears (effectively topping out his dyno in 2nd gear) They highly suggested I run 3:73 or 3:42 at minimum,
     and my hp numbers should be closer to 380-400
  - best numbers I could get with this set up were hp: 321.58@96.76 - tq333.51@73.77
CLICK ON THE PIC FOR THE VIDEO

20191011_113204 by Elwood Duffey, on Flickr
Dyno numbers by Elwood Duffey, on Flickr
 
« Last Edit: October 12, 2019, 11:45:22 PM by duffinatur »
76 Pontiac TA (long gone, first car)
69 Cadillac Eldorado (long gone)
00 HD Road King Classic
65 Pontiac GTO (gone, not forgotten)
67 Shelby AC Cobra replica (gone, winning shows still)
76 Trans Am LS1/4A TA (a recreation of my very first car)
74 Olds Cutlass Supr (status: on hold)
69 Pontiac Grand Prix (frame-off beginning soon)
Build: http://transamcountry.com/community/index.php?topic=57079.0

jonathonar89

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Re: 76 LS1 auto build thread
« Reply #294 on: October 13, 2019, 02:46:02 AM »
Nice, hopefully you get that ignition issue worked out. 

3.73 will really wake that car up with the auto.  I have a ‘98 auto T/A myself.  Those cars are pretty quick with only 2.73.  You should really have some fun at that point.

Re: 76 LS1 auto build thread
« Reply #294 on: October 13, 2019, 02:46:02 AM »


2020-B1-8


FormTA

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Re: 76 LS1 auto build thread
« Reply #295 on: October 13, 2019, 07:18:10 AM »
Nice!
79 Trans am 301 (work in progress) LS swap n progress
79 Formula 301 (Work in progress)
67 RS Camaro (Work in progress)
See the recurring theme???

Names, Luke. If I hear anyone telling me they're my father....

Re: 76 LS1 auto build thread
« Reply #295 on: October 13, 2019, 07:18:10 AM »
You can help support TAC!

 



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