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post #1 of 27 Old 06-02-2012, 03:02 PM Thread Starter
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Transmission coolers

I just added a second cooler to my car to survive hot true street cruises. A few points of commentary:

Having my existing cooler mounted under the car was not working well. As we got into it, we had the fan rotating backwards and moving air the wrong way. It was pushing air towards the ground. We have it now reversed to push air up through the cooler in the direction of heat rising and in line with the flow of air against the ground.

I bought a second cooler, the smaller of the two B&M with fans. It is a stacked plate with a spal fan and it comes with female npt fittings for in/out/and thermostatic switch. Far better quality then the tube an fin derale that is under the car.



It is up in the passenger fender. We did the lines in series. Both fans have thermostatic switches and manual override switches to turn them on. We used the ground to switch to prevent feedback into my bank of switches.

I will report back results next weekend after MIR NMCA true street.

I am keeping this in the turbo section because the heat issues I feel are strongly attributed to the multiple heat generating factors of a high hp turbo car.


1989 Saleen 89-425 all original + Baer 6P Brakes
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post #2 of 27 Old 06-02-2012, 06:57 PM
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I run the same cooler/fan as that one and recently added a second cooler (no fan) in series because it seemed like the the B&M was working pretty hard when hot lapping at the track.

Do you have a temp gauge to compare the before and after? I don't have a gauge so no idea what the temp numbers are.


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post #3 of 27 Old 06-02-2012, 08:45 PM Thread Starter
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Quote:
Originally Posted by TurboLou View Post
I run the same cooler/fan as that one and recently added a second cooler (no fan) in series because it seemed like the the B&M was working pretty hard when hot lapping at the track.

Do you have a temp gauge to compare the before and after? I don't have a gauge so no idea what the temp numbers are.
Yes, I have one and I watch it closely. Just racing there is no issue, the trans doesn't get hotter then 180. Driving the 30 miles on the true street cruise it is getting hot. It was over 250 degrees in the last race that was making me uncomfortable. It gradually creeped up over the course of the drive.

Yes, I will have clear comparisons after the next race which is a week from the date of this post.

1989 Saleen 89-425 all original + Baer 6P Brakes
1990 Saleen 90-137 heavily modded
1989 Shadow Blue Metallic Hatchback LX
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post #4 of 27 Old 06-02-2012, 11:09 PM
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i run john deere hygard (thinner one) with a B&M 6 pass cooler and no fans my trans never gets over 180 even on the transbrake or a 2 hour drive in traffic.

what tranny fluid are you running?
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post #5 of 27 Old 06-02-2012, 11:19 PM Thread Starter
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Lucas semi-synthetic

1989 Saleen 89-425 all original + Baer 6P Brakes
1990 Saleen 90-137 heavily modded
1989 Shadow Blue Metallic Hatchback LX
[email protected] -- 94mm T4 True Street Trim
Thanks: Baer, Haltech, UPR, National Parts Depot, Meziere, Weldon, BBRC
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post #6 of 27 Old 06-03-2012, 07:47 AM
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The converter produces 90% of the heat,thinking this might be issue here.
Was running a JW 9"\5000 stall and heat was a issue,also the converter sounded very loose around town.Switched over to a PTC 9"\5000 stall
everything the same,problem fixed.Very efficient,sounds stock around town.
Temps never go over 180 at the track or in traffic.Running the same cooler
with fan,no secondary cooler.Oil is type F,hope this helps.
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post #7 of 27 Old 06-03-2012, 08:09 AM Thread Starter
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I had this discussion with both Pete at Hughes where the Trans came from and with Lenny at UCC where the converter came from.

The converter was built with a mechanical diode which they both agreed that it was optimized for what I am doing. The spragless converters are the ones that run hot.

I am willing to bet the problem is solved now. I think it was a combination of a low quality cooler, fan spinning the wrong way and placement.

1989 Saleen 89-425 all original + Baer 6P Brakes
1990 Saleen 90-137 heavily modded
1989 Shadow Blue Metallic Hatchback LX
[email protected] -- 94mm T4 True Street Trim
Thanks: Baer, Haltech, UPR, National Parts Depot, Meziere, Weldon, BBRC
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post #8 of 27 Old 06-03-2012, 11:58 AM
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I no longer remember the brand but we put a big transmission cooler up under the front driver side frame rail to tackle heat issues related to "true street" events. It was parallel to the frame rail so really air could not move over it. Then we took a cooling fan off some sport bike and put that on the side(fins) to blow over it. It worked out quite well with a C6 and later Powerglide.

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post #9 of 27 Old 06-03-2012, 12:16 PM Thread Starter
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Quote:
Originally Posted by snipe656 View Post
I no longer remember the brand but we put a big transmission cooler up under the front driver side frame rail to tackle heat issues related to "true street" events. It was parallel to the frame rail so really air could not move over it. Then we took a cooling fan off some sport bike and put that on the side(fins) to blow over it. It worked out quite well with a C6 and later Powerglide.
Hanging off of the frame rail would have been a good spot but as you can see in the picture my BOV and one of the waste gates go through that area so we moved it up.

A GT nose is a huge advantage for fitting everything in the car but I don't have the heart to do that to the car.

1989 Saleen 89-425 all original + Baer 6P Brakes
1990 Saleen 90-137 heavily modded
1989 Shadow Blue Metallic Hatchback LX
[email protected] -- 94mm T4 True Street Trim
Thanks: Baer, Haltech, UPR, National Parts Depot, Meziere, Weldon, BBRC
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post #10 of 27 Old 06-10-2012, 07:56 AM Thread Starter
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Problem solved. Temp gauge after 30 mile drive in 90 degree temperature.

Not sure whether the second cooler or reversing fan direction on first solved problem.


1989 Saleen 89-425 all original + Baer 6P Brakes
1990 Saleen 90-137 heavily modded
1989 Shadow Blue Metallic Hatchback LX
[email protected] -- 94mm T4 True Street Trim
Thanks: Baer, Haltech, UPR, National Parts Depot, Meziere, Weldon, BBRC

Last edited by mcj50; 06-17-2012 at 09:15 PM.
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post #11 of 27 Old 06-10-2012, 03:48 PM
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Thanks for following up with the new temp readings. Glad you got it worked out.

1996 Cobra 4.6L 4V
Precision 80GTS, PA C4 auto
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post #12 of 27 Old 06-10-2012, 04:02 PM Thread Starter
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Quote:
Originally Posted by TurboLou View Post
Thanks for following up with the new temp readings. Glad you got it worked out.
Great meeting you. Keepin the car cool doesn't help if you screw up driving though....

I am still agitated....

1989 Saleen 89-425 all original + Baer 6P Brakes
1990 Saleen 90-137 heavily modded
1989 Shadow Blue Metallic Hatchback LX
[email protected] -- 94mm T4 True Street Trim
Thanks: Baer, Haltech, UPR, National Parts Depot, Meziere, Weldon, BBRC
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post #13 of 27 Old 06-10-2012, 05:17 PM
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What happened?

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post #14 of 27 Old 06-10-2012, 06:13 PM Thread Starter
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Originally Posted by TRmustangTR View Post
What happened?
Not used to the new manual brake setup on the car. It is very different to prestage and to "bump" to transbrake. I went past the deep stage point by accident on the second pass prior to the tree being set (e.g., guy in other lane was fully staged). No time registered from the pass resulting in a DNF for the race. Ran 2 9.0's on the other passes, winner (whose car was impressive) went 9.28 avg.

I hate making mistakes.

...however, trans stayed cool.

1989 Saleen 89-425 all original + Baer 6P Brakes
1990 Saleen 90-137 heavily modded
1989 Shadow Blue Metallic Hatchback LX
[email protected] -- 94mm T4 True Street Trim
Thanks: Baer, Haltech, UPR, National Parts Depot, Meziere, Weldon, BBRC
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post #15 of 27 Old 06-11-2012, 09:07 AM
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Quote:
Originally Posted by mcj50 View Post
Great meeting you. Keepin the car cool doesn't help if you screw up driving though....

I am still agitated....

Yea nice meeting you as well. You definitely had the car to beat in true street so I understand your disappointment. Impressive street car.

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post #16 of 27 Old 06-13-2012, 05:58 PM
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do you think a 500hp stock block car with an aod can get away with one cooler/fan combo?
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post #17 of 27 Old 06-13-2012, 06:43 PM
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Originally Posted by nyctony View Post
do you think a 500hp stock block car with an aod can get away with one cooler/fan combo?
lock up(direct drive) or non lock up converter? What does the converter stall?

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post #18 of 27 Old 06-13-2012, 09:01 PM
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lock up(direct drive) or non lock up converter? What does the converter stall?
Non lock up. I believe the stall is 3500ish.

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post #19 of 27 Old 06-14-2012, 12:27 AM
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Quote:
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do you think a 500hp stock block car with an aod can get away with one cooler/fan combo?
My combo lasted 5 years (weekend car-still going strong ) with the largest B&M cooler and just a radiator fan. 900hp and a 4200rpm stall. I had to change coolers over the winter do to a larger intercooler.

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Old combo:352 single 76mm turbo, 16psi, AOD, 9.41 @ 149mph, E85, 255/50/16 MT DR, 3500lb STREET car driven everywhere.
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post #20 of 27 Old 06-14-2012, 11:34 AM
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Im putting a trans temp gauge in the car now, i just spent a good amount of money in a p/g and converter combo. I drive my car alot on the street. Mike where did you mount the temp sensor? On the line or the pan?

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post #21 of 27 Old 06-14-2012, 11:41 AM Thread Starter
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Originally Posted by 93alexcoupe View Post
Im putting a trans temp gauge in the car now, i just spent a good amount of money in a p/g and converter combo. I drive my car alot on the street. Mike where did you mount the temp sensor? On the line or the pan?
Pan.

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1990 Saleen 90-137 heavily modded
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post #22 of 27 Old 06-14-2012, 12:08 PM
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In the return line after the cooler is the prefered sensor location imo. The pan will read cooler.

New build in progress: Twin Gen 2 PT6466 352

Old combo:352 single 76mm turbo, 16psi, AOD, 9.41 @ 149mph, E85, 255/50/16 MT DR, 3500lb STREET car driven everywhere.
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post #23 of 27 Old 06-14-2012, 02:14 PM Thread Starter
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I have a t-fitting in my return. I didn't like the way the sensor sits in the tee. If i thought it was an issue I could easily test the difference but suspect it isn't a major difference.

The thermostatic switches on the fans are on the inbound line which adds yet another temperature reading.

Mine stayed almost dead on 180 with 175 thermostatic switches on the fans.

1989 Saleen 89-425 all original + Baer 6P Brakes
1990 Saleen 90-137 heavily modded
1989 Shadow Blue Metallic Hatchback LX
[email protected] -- 94mm T4 True Street Trim
Thanks: Baer, Haltech, UPR, National Parts Depot, Meziere, Weldon, BBRC
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post #24 of 27 Old 06-15-2012, 10:13 AM
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I read on the bullet that putting it on the return line will read higher but not to be alarmed with the higher reading. If there is a problem with the trans you will pick up on it quicker with the sensor on the line than the pan. Also after a pass, if you let the car idle long enough, the temp will go down and you will have a pan reading.
Of course with a 8sec or 9sec car, who is going to be staring at the trans temp while going down the track?lol not me. Thanks again for the info, I'm going to be checking my temps on the street as I don't want to overheat my trans.

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post #25 of 27 Old 06-15-2012, 10:46 AM Thread Starter
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I read on the bullet that putting it on the return line will read higher but not to be alarmed with the higher reading. If there is a problem with the trans you will pick up on it quicker with the sensor on the line than the pan. Also after a pass, if you let the car idle long enough, the temp will go down and you will have a pan reading.
Of course with a 8sec or 9sec car, who is going to be staring at the trans temp while going down the track?lol not me. Thanks again for the info, I'm going to be checking my temps on the street as I don't want to overheat my trans.
My trans doesn't really get hot making passes. It gets hot on street driving.

I don't get a signficant drop on the return road either. It takes a bit of time. It is on my list to check line pressure in the cooler lines through that tee at idle and while at a more substantial rpm.

1989 Saleen 89-425 all original + Baer 6P Brakes
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post #26 of 27 Old 07-15-2012, 07:09 PM
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Bringing this back up, i just got my car back running took it home for the first time and first long drive after all the changes. Tranny temp stayed at 195 on a 27 mile trip back home. Havent really had a stop and go traffic yet, curious to see if it will go higher. If it does, I will def do the second cooler or my new rad has a trans cooler, I thought about adding that to the remote unit.
Also my engine temps dropped big time, I put a chanpion 3 row aluminum with contour fans with no tstat, temps stay at 160 even during WOT hits.
I'll post pics of all the changes soon, going to the dyno tomorrow and track soon.


My rpms stopped working after the ls coil swap so the car is on... Lol

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post #27 of 27 Old 07-16-2012, 12:04 AM
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Ready for some dyno results man. Just got my car back up and going with the new fuel setup and swaped over to E85. Knocked out a few 19-20lb pulls last night and im pretty happy with the feel. once it cools down Ill be happy to get back out to the track.

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