ST185 ATA Safe Boost Level

Monachopsis

Member
Hi guys, so I just bought my JDM Narrowbody, and it's on the boat, but I have a chronic issue with planning builds before I start them. One of the first mods or lack of mods depending on results is the intercooler. Due to this being a turbo 90's over boosting the intercooler is something I'm not interested in. Anyways does anyone have any idea what the stock st185 ATA intercooler is good for, I was hoping low-mid 300 so ehh sub 20psi. (18ish). I know the WTA does a good job but those are rare as heck, and I really want to keep the topmount

TL:DR What boost can a stock intercooler take from a ST185. ATA.

Cheers
 

grip-addict

Active member
10-12 would be my guess. I ran 15 on factory turbo and factory ata intercooler and blew the head gasket after a season when I was a kid.
Honestly, I recommended not touching it without an intercooler upgrade.
 

RedCelicaTRD

Moderator
The stock ata isn’t terrible. The stock ecu causes most of the issues when you increase boost. 14psi would be fine, but I would recommend you put a fan on the intercooler to keep heat soak under control when in traffic.
 

Monachopsis

Member
Makes sense, the more I read into our boost systems, we need a lot just to up the boost, like defender changes and whatnot. I was looking at 14 psi for a more dailiable boost level, but I live somewhere where it gets super cold winters and super hot summers, so I think the wta would just work, if I can find one, if not make one. Appreciate you guys
 

Gert

Active member
IMHO, safe levels depends on other mods too. With only raising boost, I would not go over 12 psi.
With other basic upgrades like: EVC, free flowing exhaust, airfilter and fuelpomp mod, I would go 14 psi max. Pretty fast above stock.

But, the ST185 is not an real fast car. If you want her faster then these basic power upgrades: prepare to throw in serious money.
 

awdmofo

Member
Sweet, I assumed as much. I guess I'll look around for a the st205 wta then. Much appreciated
You should be able to find a 205 WTA IC around, most people with 3rd gen all-trac engines go to front mount ATA once they push the limits of the WTA. I found my 205 for like $200 I think 5 years ago, should be able to find one for $250-300. That isn't including piping or a pump or the heat exchanger.
 
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