Author Topic: Need opinions on radiators  (Read 12725 times)

EscapeRacing

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Re: Need opinions on radiators
« Reply #40 on: March 15, 2019, 10:40:41 PM »
Here are some pics of the OReilly's Murray Part Number 433477










Aus78Formula

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Re: Need opinions on radiators
« Reply #41 on: March 15, 2019, 11:30:45 PM »
What's with the shroud chop? A new or old radiator can't cool with that.

EscapeRacing

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Re: Need opinions on radiators
« Reply #42 on: March 16, 2019, 10:58:26 AM »
The part missing on the top? Looks like the PO cut it out for access for some reason, but the top section goes on and is held in place with a couple metal brackets. I left it off for these pics only. Otherwise the shroud goes all the way across.

79T/Aman

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Re: Need opinions on radiators
« Reply #43 on: March 16, 2019, 01:00:38 PM »
agree with Aus78, a 4 core will expose more coolant to the heat transferring tubes, an aluminum rad only has 2 rows of tubes because the aluminum tubes can't be made as small as brass or copper (which ever is used for the tubes).
So a 20* drop is indicative of a problem with the old rad probably half plugged up.
www.pro-touringf-body.com  your source for making your Trans am do what it does best!......SHOW OFF!

Aus78Formula

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Re: Need opinions on radiators
« Reply #44 on: March 16, 2019, 08:33:24 PM »
The part missing on the top? Looks like the PO cut it out for access for some reason, but the top section goes on and is held in place with a couple metal brackets. I left it off for these pics only. Otherwise the shroud goes all the way across.

Ok fair enough. Radiator swap would have been a good excuse to find a replacement, they are becoming hard to find in good shape and not repro'd. If it doesn't bother you, all good.
« Last Edit: March 16, 2019, 08:37:03 PM by Aus78Formula »

Re: Need opinions on radiators
« Reply #44 on: March 16, 2019, 08:33:24 PM »

EscapeRacing

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Re: Need opinions on radiators
« Reply #45 on: March 16, 2019, 08:57:42 PM »
Nah, truth be told it bugs me. It’s going on the list!

What about the red / orange heater hose? Supposed to be that color or should that be black?

So much to learn!

79T/Aman

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Re: Need opinions on radiators
« Reply #46 on: March 17, 2019, 07:30:31 AM »
having the top of the shroud missing also makes the fan very inefficient at drawing air through the rad and can cause some over heating in low speed driving.
www.pro-touringf-body.com  your source for making your Trans am do what it does best!......SHOW OFF!

stros

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Re: Need opinions on radiators
« Reply #47 on: March 17, 2019, 10:17:42 AM »
I purchased a Dewitts Radiator made in Michigan.  It has been great and drops in perfectly into our 2nd gens.   It also has a lifetime warranty.

I had mine customized with 1.25" dual tubes.   

I also have a Spal fan that I ran simultaneously with the factory clutch fan.  I actually have this setup for sale right now for half of what I paid for it.

I actually have it for sale as I went with an LS3 (the LS3 is running a Dewitts setup as well). 

https://www.ebay.com/itm/333117049073

http://transamcountry.com/community/index.php?topic=80393.msg770635#msg770635
« Last Edit: March 17, 2019, 10:29:12 AM by stros »
Darryl

'77 black TA Hardtop LS3 / 4L70E swap
Build thread:
http://transamcountry.com/community/index.php?topic=61066

Aus78Formula

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Re: Need opinions on radiators
« Reply #48 on: March 17, 2019, 06:37:25 PM »
I looked at a couple of smaller fans for cooling, mounted offset on the front as pushers. I didn't consider if there was room alongside the clutch fan within the shroud. It didn't go any further as I figured I'd wait until it's closer to being on the road but would be handy to have a backup fan for those extra hot days and running the A/C and overdrive trans.

Was yours wired to run full time, or kicked in with A/C or when the temp rose?

stros

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Re: Need opinions on radiators
« Reply #49 on: March 18, 2019, 07:28:43 PM »

Was yours wired to run full time, or kicked in with A/C or when the temp rose?

At the time I was running the MSD EFI Kit, which turned the Spal fan on at 195-200 degrees.

I was surprised that my mechanic went with this approach too - even more surprised that it all fit. Seems like a good way to save a few bucks from buying a 2nd fan.
Darryl

'77 black TA Hardtop LS3 / 4L70E swap
Build thread:
http://transamcountry.com/community/index.php?topic=61066

Re: Need opinions on radiators
« Reply #49 on: March 18, 2019, 07:28:43 PM »
You can help support TAC!