RB25 stock boost

I should probably ask this in the Skyline forum, but I'll ask it here first, what's the stock boost for an RB25 our of an R33, like the boost the actuator is set for (it's a ball bearing T28 with T3 flange). The reason I'm asking is that I bought this turbo (yes, I will be KA-T soon :iceslolan ) and I was wondering f the actuator was set for like 6psi, i could run anF FMU with stock injectors and stock MAFS until I have money for injectors, Z32 MAFS and ECU tune.

7 PSI..

You are not JDM TYTE YOU FAIL.

buy a used ebc or you could just got manual, and since the psi is so little i dont know if it will matter that it's manual...

I didn't mention a boost controller anywhere in my post so...lol, anyways, I'm just wondering if 7psi is to high for the stock injectors + FMU to handle, that's all, probably is.

get some 370cc sr20det inj, they are fairly cheap, what is the ka's running anyhow?

Can I use an FMU with 370s? Or do I need an S-AFC?

I am pretty sure the stock fuel system can handle 7psi. Injectors will prolly hit 100% duty cycle at full throttle though.

does the ka24de/e change the timing with the a/f ration etc? if so the any of the apex afc wont work good with that b/c it lies to the computer about the air coming in and it cant adjust timing correctly...

You don't want your injector duty cycle to go above 80%.


Get SR20/RB25 370ccs and an SAFC. FMUs are wack.

PS. stock boost is 7psi. don't run it over 14 ever or the compressor wheel will break.

the turbo is good to about 300whp.

What is fmu? fuel management unit?

BTW...if I remember my friend right there are 2 types of RB25DET turbos one is a Ceramic T28 and the other is a GT28 Style Ball Bearing. And he has got his hands on the Ball Bearing one. Im pretty sure only the ceramic T28s had the super explosivoness(no typo).

Well I want bigger injectors, Z32 MAFS and ECU tune, but i was trying to find a way to get boosting early, while I'm saving for the fuel stuff, but i guess there are no shortcuts lol. But if I get 370s, might as well get 444s or 670s or wtv the biggest deutchworks ones are. lol go big or go home....

BTW...if I remember my friend right there are 2 types of RB25DET turbos one is a Ceramic T28 and the other is a GT28 Style Ball Bearing. And he has got his hands on the Ball Bearing one. Im pretty sure only the ceramic T28s had the super explosivoness(no typo).

Kinda, the early R33 Turbos were slightly different and make a little more power.... but they'll still blow up over 14lbs.

for more info I'd have to ask Nissan Eleitist.

did the R33 cermaics use a ceramic compressor wheel? Ive never heard of that, only ceramic turbine wheel, same as the BB's are made out of ceramics to handle high temps. That sucks about the defectiveness though, never knew that.