Im trying to figure out how much power i can make with my stock 03 wrx tranny with out it giving out. its an auto other wise i wouldn't be asking. im sure in not the only one that has tried to build a rex with an auto tranny. any body know the limitations of it? Kyle
Not even close. The clutch packs are what you have to worry about. I ran a 18g at 24psi for 45k on my 02 4eat (and someone else is driving it now) and with a converter and valve body mod it was holding up fine. I know Jorge (chicago guy) was having issues once he was up around 400wtq. The other thing to remember is put the largest tranny cooler you can on the car. The heat will kill it faster than anything else. Russ
hey, I was a few beers into that night thank you very much....and I was hanging around you and a ginger...even the smartest people become instantly stupid when faced with those conditions. lulz ..and yes, transmission cooler upgrade on the WRX is very easy. I just did another one on a 03 wrx and it took like 10 minutes.
awesome so i hope to get around 275-300 whp, so my tranny wont be an issue if i address the weaker items in the chain?
The biggest thing to remember is that whp on a 4eat tranny will read low. My 18g was around 250whp and 310ish wtq. IIRC wrxecho with his 20g was 260whp and 340wtq on a mustang dyno. You can't really shoot for a whp number like you can with a MT, there are too many variables that will skew that number. I would figure out what you want to do with the car and go from there. what size turbo and what you consider to be acceptable spool and go from there. For me, step 1 is a converter, step 2 is a cooler, step 3 is get everything retuned (assuming you already have a TBE). A converter swap will require a retune. EVERYTHING changes so much with a converter. A car with a converter is live driving a v8. NO lag on the pretty much any of the VF turbos. Even on my 18g, I was over 20psi before 3500rpm. Russ
damn, well i guess ill just have to do what i had planned and see how much power i make. what is good converter to go with?
silver03 has a level 10 torque converter...put it in the car like 4 years ago. he likes it...although he is only stage 2 bullwinkle tune www.levelten.com
I would stay FAR away from levelten. Even run the other direction. Protorque did my converter and IPT would be another source to check out. http://www.importperformancetrans.com/subaruauto.shtml Russ
^^What's wrong with level 10? I don't follow the 4EAT mods too close....I only know silver03's has worked good.
so is it worth it so spend 600 plus labor or would it be better to just save my pennies and do a manual swap????? i planned on doing it eventually. does anybody have a list or parts i would need to do the swap?
Any way you look at it, the 4eat will eat itself eventually. The IPT stuff works, and the modified valve body is the best thing you can do as far as longevity is concerned. Torque converter is all about modifying your power band. The sure-fire auto is more expensive than a built 5mt ot a 6mt swap.
When they did by valvebody, after the $750 service charge I get the valvebody hanging half way out of the box. They tell me to get f'd with 3 broken solenoids that cost me another $400 to replace. Then the VB doesn't work right, so I have to send it back on my dime to get repaired, and they send it back to me collect. So after all that screwing around they tell me to file a damage claim against ups for the the busted VB and in the great world we live in, UPS ships the claim money to the shipper. So level 10 made a additional $250 (because that is all they insured it for) off of sending me a f'd up VB. And if you read on nasioc, there are tons more of those stories or worse (as in, not even returning whole transmissions). Russ
I ran across this some time ago. I haven't done this so im not sure of the accuracy, but im guessing becuase its a NASIOC sticky its good. 6MT ftw http://forums.nasioc.com/forums/showthread.php?t=1672474
^^Speaks the truth. My Stage 2 WRX only made 146/160 on a Dyno Dynamics. Was like 178/196 Dynojet corrected.
