MAX BOOST ON RB2O FACTORY CHARGER ?

[180sx]

this may be the wrong place to ask, but i have ka-t and i am using factory rb20 turbocharger the ceramic wheel one. and i assume that amount of psi the turbo can handle will be the same for ka or rb . being ceramic wheel i was told 17psi max . i am thinking of goint to dyno to get my set up tuned and curious as to if 17psi the highest i should try on this charger? don't really wanna fry my turbo . and i tried searching on rb20.com but there is too many arguments and no acual proof as to psi it can handlethanks

[Joe]

12-14 is the safe limit without exhaust wheel damage. some people go higher, some dont make it that high. its hit or miss.

[blues14]

i have heard that 12psi is safe, 14 is pushing it and anything higher is asking for trouble. I have friends who ran 16-17 psi at a strip and they actually blew the intake manifold gasket but the turbo was ok... maybe just for one run on the dyno at 17psi might be ok, but for daily driving, i would leave it at 12-13 psi.

[themadscientist]

14, any more and it won't last long. You are just making heat and turbulance at that point anyway, way above the turbos efficiency range.

[RB20DETodd]

14, any more and it won't last long. You are just making heat and turbulance at that point anyway, way above the turbos efficiency range.

Exactly, i have a rb25 turbo on my rb20 pretty much a worthless "upgrade" but its ok for now im running 14psi its ok but i rarely boost that high the rb20 injectors are 270cc so im getting close to maxing those out, i think when i get the 550cc's and a safc2 it will pull like 14psi, cause my 14psi is weak as hell, if you have stock injectors and no fuel management dont bother going above 12 on the stock turbine.

[180sx]

so the only problem is the stupid ceramic exhaust wheel? cuz t25 off sr gets pushed into 25psi as well as z31 chargers. is there just a way to upgrade the wheel , use a metal one from any other t3??

[Sil240]

Bro read the other reply's1- over 14psi the wheel is gonna explode2- over 14psi is probably just creating heat and churning up the air

As for SR t25's going to 25psi, i definety dont know aout that.Im sure someones done it before but why??for the same reason # 2Z31 turbos you can run higher boost levels because its a larger turboI'm sure if you take it to a turbo rebuild shop they could do somethng

[vg33t]

25psi out of a z31 turbo? I would have to see that to blieve it. I had one that maxed out at 15psi.

[RB20DETodd]

so the only problem is the stupid ceramic exhaust wheel? cuz t25 off sr gets pushed into 25psi as well as z31 chargers. is there just a way to upgrade the wheel , use a metal one from any other t3??

Fuel is one stock injectors are 270cc, and like Themadscientist said the turbo looses efficiency, just upgrade the turbo completely to a non-nissan turbo

[rb240det]

Exactly, i have a rb25 turbo on my rb20 pretty much a worthless "upgrade" but its ok for now im running 14psi its ok but i rarely boost that high the rb20 injectors are 270cc so im getting close to maxing those out, i think when i get the 550cc's and a safc2 it will pull like 14psi, cause my 14psi is weak as hell, if you have stock injectors and no fuel management dont bother going above 12 on the stock turbine.

Pushing more than 14psi is going to wreak havoc on those ceramic turbine wheels. Dude as far as the SAFC II goes...try chipping your ECU first to correct for bigger injectors, then use the SAFC to fine tune it more. I just got my RB20DET S13 back from the dyno this weekend, and they had to correct like 30% with my 440cc's from the MkIII Supra. Don't get me wrong...the SAFC did get me like 50+ WHP after tuning...but chipping it first should help out a lot.