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Old 09-27-2011, 06:09 PM   #1
Scooby Newbie
Member#: 225185
Join Date: Sep 2009
Default Cooling the conversion

I successfully converted (mostly) a 2004 Impreza Outback Sport Auto to a hybrid monster. EJ25(7?) STI Block with heads off a 2002 WRX (rebuilt with 3 angle grind), a 2003 WRX TD04 turbo with 100K on it and a straight exhaust with no cats. Replaced all the wiring and got a gently used 4EAT from a 2004 WRX AT turbo.

Still stock however is my radiator and fans. I am on the brink of not having cooling issues. She starts to get warm going up hill slowly in 3rd gear, when I drop into 2nd to get the RPMS up, the temp goes back down. Driving fast in 4th gear is not a problem likely due to the air cooling. If I got stock bumper to bumper on a highway going uphill I think I'd be screwed

So I am getting the godspeed radiator and fan set off ebay and it doesn't come with hookups for the tranny. I do not drive this car hard and I will not be drag racing. At most I will tow a snowmobile and trailer weighing no more then 1200 pounds, sometimes uphill

Can I get away with using the following tranny cooler mounted in front of my radioators or should I get the hayden 403/405 or even more use a cooler with a fan on it?

What I have available right now is a Jegs tranny cooler i paid $25:
12,000 GVW 12.5" x 5" x 3/4"
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Old 10-19-2011, 03:09 PM   #2
Scooby Newbie
Member#: 225185
Join Date: Sep 2009

The godspeed radiator and fans have solved my overheating issue, however, the 'through the radiator' mounting hardware has lead to a leak. I drive on rough roads a lot so I am not using that method again.

Has anyone used and can recommend any of the universal fan mounting kits to secure an electric fan to a radiator so I don't repeat this mistake?

Thank you
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Old 10-19-2011, 07:00 PM   #3
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Member#: 225185
Join Date: Sep 2009

I manged to find the shroud, does anyone know if I can buy this in the states instead of China? not that I have anything against China

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Old 10-19-2011, 08:24 PM   #4
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Member#: 70710
Join Date: Sep 2004
Chapter/Region: Tri-State
Location: Quakertown/AREA1320 391whp
2002 04STi Swaped RS
w/PPGS & 02 Wagon w/PPGs


Your cheapest and easiest solution is a trans cooler. The long bar type is the simplest install......rite under the bumper beam in front of the AC condenser. I believe you will need either a 18"-22"

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Old 10-19-2011, 08:57 PM   #5
Scooby Specialist
Member#: 170439
Join Date: Jan 2008
Location: Sioux Falls, SD
I <3 Lamp


don't get a bar type trans cooler, do it right and get a cooler made for transmission fluid.

That jegs one should do okay, it would be better to get a larger one though.

Last edited by sorrowfulkiller; 10-19-2011 at 09:04 PM.
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Old 10-19-2011, 09:47 PM   #6
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Member#: 225185
Join Date: Sep 2009

thanks for the input. I ended up using the jegs because there was no where to fit the larger Hayden model. I should be ok for the winter but will likely purchase a tranny temp guage that goes in the pan of the tranny to be smart. If the summers cause the temp to be to high, I'll add a second cooler or mount a small fan on the jegs cooler.

I'm just disappointed that I have to buy another radiator because those 'through the radiator' mounts just plain suck for folks like me who live on dirt roads in the mountains. At least I can say there is a solution to my overheating issues, and for that I am thankful.

Ebay has a complete dual core with high speed fans mounted to a shroud for under $200

anyone need a set of 1250 CFM 12' fans? used for less than 100 miles
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