Whats the Stock Turbo On a RB20det? pics inside

[warallthetime3x]

i own an SR20. got some bolt ons and all. my friend bought a rb20 for pretty cheap. the turbo says nissan on it not garrett.. i beleive the stock turbo is a t25? could this be aftermarket? he claims it to be a t28...

just some help, i used the searched bar, google, and cant find anything. seems like the rb is more underground than the SR...

and what is the stock boost for the RB turbo?

thanks , just need some info from more people that know about the RB20, so i can shut this kid up

[Coolwhip]

t28/t3 @ 7lbs

[nizmo zilvia]

rb20 is 10psi

rb25 is 7psi

no?

[Coolwhip]

perhaps... I'm alittle new to the "other" rb's

[warallthetime3x]

Hmm Yeah am just asking out of curiosity. one of my friends has an RB in his hatch, and we were cruising and I was pulling on him with my SR. He said he's got the same turbo as me (T25) but he said he was pushing 6lbs at the time? Idk how that's possible with the accuator.. Boost controller maybe?

Idk

Maybe it varies with the gts, or gtr . Also what is weird is on the turbo it self, has Nissan inscribed on the housing. Not garret. And its all numbers/letters outta wack. Not like the SR, says garret T25 AR .80. His has nothing like that.

The acuator on this RB Is Bigger. The other Rbs we were looking at were smaller...

[nizmo zilvia]

lol ok little brother

[nizmo zilvia]

Hes got a RB20 with most likely a RB20 turbo (obviously) unless he upgraded it or until someone else upgraded it but thats highly rare. So yea hes boosting 10psi otherwise 7psi w/ a rb25 turbo (drop in swap).

[AxiOn419]

rb20 is 10psi

rb25 is 7psi

no?

That is news to me, I thought both the rb20 and rb25 were stock 7 psi? My 20 always hit 7 psi on the nose and I never messed with any boost settings.

[Yellow4g63]

That is news to me, I thought both the rb20 and rb25 were stock 7 psi? My 20 always hit 7 psi on the nose and I never messed with any boost settings.

Whats size exhaust do you have? Mine bosted 10psi with 3" exhaust.

[nizmo zilvia]

I mean thats what I experienced. 10psi on rb20 and 7psi on rb25. So unless your boost is wrong or w/e you may have to check it.

[mello88]

I mean thats what I experienced. 10psi on rb20 and 7psi on rb25. So unless your boost is wrong or w/e you may have to check it.

This is correct RB20 should boost 10psi and RB25 should be 7psi stock. Per FSM and tons of threads on the topic... The actuators are different, you can swap one to the other if you want.

To the original poster... RB turbines with the ceramic wheel do not last long at more than 14psi. You should also know the RB turbo won't bolt up to your SR, unelss you have a T3 flanged manifold. Everyone thinks/says RB turbos are "T28s" which implies they have a T2 flange on them -- that's misleading since all RB turbos have T3 flanges on them.

[AxiOn419]

Whats size exhaust do you have? Mine bosted 10psi with 3" exhaust.

3 inch exhaust, using the stock turbo elbow welded to the downpipe

[redtop91]

that's misleading since all RB turbos have T3 flanges on them.

Not the 26.

[Carl H]

does your turbo get its pressure signal from the compressor housing or the intake manifold?25 turbos get their signal from the manifold as the compressor housing has no nipple for boost pressure.

That is news to me, I thought both the rb20 and rb25 were stock 7 psi? My 20 always hit 7 psi on the nose and I never messed with any boost settings.

[warallthetime3x]

This is correct RB20 should boost 10psi and RB25 should be 7psi stock. Per FSM and tons of threads on the topic... The actuators are different, you can swap one to the other if you want.

To the original poster... RB turbines with the ceramic wheel do not last long at more than 14psi. You should also know the RB turbo won't bolt up to your SR, unelss you have a T3 flanged manifold. Everyone thinks/says RB turbos are "T28s" which implies they have a T2 flange on them -- that's misleading since all RB turbos have T3 flanges on them.

Nah I understand. I'm fine with my t25. Am posting for a friend. I my self know nothing about the rb. Was curious cause was hearing different things and such. Well just have to see.

This actuator is pretty big as you can see in the picture. Does that mean this one will boost at 10lbs?and what you're saying. Just leave it stock don't up the boost higher than 14 ?.... my friend that I was referring to that said he has a t25 on it. Last weekend. He was pushing 15lbs....y'all probally know him. JDMZENKIS14.... Tony...?

[nizmo zilvia]

Hes retarded and doesn't know what hes getting himself into. Yet alone he doesn't know the specs on what he has. :P

[warallthetime3x]

Hes retarded and doesn't know what hes getting himself into. Yet alone he doesn't know the specs on what he has. :P

Yeahh....I doubt he's retarted but alright. That's all I needed to know thank you

[AxiOn419]

does your turbo get its pressure signal from the compressor housing or the intake manifold?25 turbos get their signal from the manifold as the compressor housing has no nipple for boost pressure.

My boost gauge reads right from the nipple at the back of the intake manifold. Should I be reading it from somewhere else?

[Yellow4g63]

I thought there was a spot on the turbo for the waste gate hose to go too. Off the Compressor housing?

[tjmhillz]

is that turbo tonys or dans? tony told me he was running a rb25 turbo....

[warallthetime3x]

is that turbo tonys or dans? tony told me he was running a rb25 turbo....

Its dans. Tony told be a while ago his was a t25. Idk just saying I was asking what turbos on a RB20. I got it. Thanks.

[DriftX]

All I know is on my stock actuator, I would spike 11 psi, and it would fall to 8psi at redline, i put on a fabbed-hks actuator and now it holds a steady 7-8

[Mack-S14]

RB20DET = 0,7"Bar" = 11 Psi

1 Bar = 14,7 Psi