Transmission Cooler routing options and affects on engine temp - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

pony · 08-24-2018, 09:37 AM

I'm planning on installing a stall converter on my L99 with some modest mods. I've read till I can't see straight but have some questions hopefully someone else has experienced and can chime in.

I know I can route through the radiator and then through the new external cooler. I also have seen where others have bypassed the radiator completely.

Question 1 being, with a stall increasing trans temps, will the engine temp increase due to the higher heat fluid being introduced into the radiator? (My engine temp already runs high 200-teens and one poster mentioned this issue on road racing)

Will a good stand alone stack plate 30-40k Btu front mount WITHOUT separate fan do a good job AND hopefully reduce the strain on engine temp.

I'm trying to avoid adding an oil cooler as well. Any thoughts or actual experience will be appreciated.

LsxDoctor · 08-24-2018, 09:43 AM

Short answer is No it will not change engine temp.
On my GTO I'm running a 5k stall I have my fluid going to Rad then cooler with no issues (no fan, cheap jegs cooler).
In my other cars I have always just ran through the cooler and not the rad. Either way you'll be fine.

Bo White · 08-24-2018, 06:30 PM

If your going to run the factory cooler and an aux cooler run the fluid through the factory cooler first then the aux

GRNFLSH · 08-25-2018, 09:38 AM

3800 stall wth an ADM transcooler run straight to the cooler. They include some capped tubes for the radiator cooler to keep it from junk up in there.

The trans still warms up quickly, helped by the stall, but never gets past 170F on the street, 190F after back to back passes at the track. Unless yours is a DD and wanting help warming the trans on very cold days I dont see any benefit of running through the radiator.

Bo White · 08-25-2018, 11:48 AM

Benefit is a more stable trans temp. Mine never moved around when I had mine routed like that. Now that mine i just running the aux cooler mine floats around like that. Just under 180* cruising and just over 180* running it.

hammdo · 09-02-2018, 06:44 PM

I did this:

https://www.camaro5.com/forums/showp...postcount=1689

https://www.camaro5.com/forums/showp...postcount=1702

https://www.camaro5.com/forums/showp...postcount=1703

-Don

08-24-2018, 09:37 AM	#1
pony Drives: 2011 2SS Convert; Color RJT Join Date: Sep 2009 Location: Nebraska Posts: 722	Transmission Cooler routing options and affects on engine temp I'm planning on installing a stall converter on my L99 with some modest mods. I've read till I can't see straight but have some questions hopefully someone else has experienced and can chime in. I know I can route through the radiator and then through the new external cooler. I also have seen where others have bypassed the radiator completely. Question 1 being, with a stall increasing trans temps, will the engine temp increase due to the higher heat fluid being introduced into the radiator? (My engine temp already runs high 200-teens and one poster mentioned this issue on road racing) Will a good stand alone stack plate 30-40k Btu front mount WITHOUT separate fan do a good job AND hopefully reduce the strain on engine temp. I'm trying to avoid adding an oil cooler as well. Any thoughts or actual experience will be appreciated. Last edited by pony; 08-24-2018 at 09:54 AM.

08-24-2018, 09:43 AM	#2
LsxDoctor 15 Year LS1Tech Member Drives: 2010 ss 391ci LS3 Join Date: Apr 2017 Location: Albuquerque Posts: 252	Short answer is No it will not change engine temp. On my GTO I'm running a 5k stall I have my fluid going to Rad then cooler with no issues (no fan, cheap jegs cooler). In my other cars I have always just ran through the cooler and not the rad. Either way you'll be fine. __________________ GJDM

08-25-2018, 09:38 AM	#4
GRNFLSH Drives: 2015 Camaro 2SS Green Flash Edition Join Date: Dec 2015 Location: NW Arkansas Posts: 200	3800 stall wth an ADM transcooler run straight to the cooler. They include some capped tubes for the radiator cooler to keep it from junk up in there. The trans still warms up quickly, helped by the stall, but never gets past 170F on the street, 190F after back to back passes at the track. Unless yours is a DD and wanting help warming the trans on very cold days I dont see any benefit of running through the radiator. __________________ Kooks stepped headers & Solo XL Cat-back ADM CAI w/race scoop & Rotofab w/w relo GPI VVT SS1 cam and CNC ported heads milled .30 BTR .660 springs, Straub solid bushing trunions GPI rod-mod intake with I-M heat sheild Circle D 258mm Pro single disc 3700 rpm stall converter 169F thermostat & manual fan switch Tuned by Ryno at GPI - 455 RWHP / 416 lb-ft

09-02-2018, 06:44 PM	#6
hammdo 'It's an experiment' Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014 Location: Dallas TX Posts: 8,693 View My Garage	I did this: https://www.camaro5.com/forums/showp...postcount=1689 https://www.camaro5.com/forums/showp...postcount=1702 https://www.camaro5.com/forums/showp...postcount=1703 -Don __________________ 747 RWHP 794 RWTQ "Horsepower sells cars, torque wins races." - Enzo Ferrari See My Build: http://www.camaro5.com/forums/showthread.php?t=385577

08-24-2018, 06:30 PM	#3
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,018	If your going to run the factory cooler and an aux cooler run the fluid through the factory cooler first then the aux

08-25-2018, 11:48 AM	#5
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,018	Benefit is a more stable trans temp. Mine never moved around when I had mine routed like that. Now that mine i just running the aux cooler mine floats around like that. Just under 180* cruising and just over 180* running it.