Popular turbo upgrades for the RB25 & ~350-450WHP

[skribblah]

can anybody provide any input? the goal is 350-450WHP with stock internals. also looking for something that would be as compatible with stock components as possible (water cooled, internal gate, etc)

[240sxautox]

lol.

why shoot for 450whp on stock internals? I mean yes you can do all that, but don't you want to make a strong motor even stronger? If you've got the money to buy a huge turbo- go ahead and get the pistons/cams/etc. etc. and a good mid-size to large turbo.

and fuel upgrades. Lots of fuel upgrades.

[eh?]

Why would you upgrade internals for 350-450whp? Waste of money. You're looking at $3.5k min for a full rebuild.

A GT30r would get you there and a standalone, inj's etc etc etc etc is a must . But you not going to find much that's compatible with stock components.

[StricNyne]

sigh he is correct i wish i just bought longblock when i blew my motor woulda saved me like 3k easily

[Coolwhip]

[skribblah]

Why would you upgrade internals for 350-450whp? Waste of money. You're looking at $3.5k min for a full rebuild.

A GT30r would get you there and a standalone, inj's etc etc etc etc is a must . But you not going to find much that's compatible with stock components.

OK so GT30R, standalone, injectors and what else??

[lucky7]

wastegate and tune. you'll probably need to modify your stock manifold also.

[skribblah]

wastegate and tune. you'll probably need to modify your stock manifold also.

in what way?

whats so bad about the internal gate?

[zdrifter]

Turbo, Injectors, Tune, Headgasket, head studs, exhaust, turbo header, front mount IC, clutch....Anyone else welcome to add. Id say your in it easy 3.5-4K.

[Fearsome_tea]

Ummm.....oh yea that clutch thingy

[eh?]

Run a fresh oem headgasket and head studs. Personally I wouldn't even bother with either unless going over 450whp. My head isn't lifting spiking 20psi with a 62-1 /t3.

[Cjmartz2k]

I'm around the middle of your range with mine, but it's a lpretty laggy for only 400'ish whp. I'm going TO4R as soon as I can track one down. That's on a stock motor. Your fine with 450-500hp atf on a stock motor with a good tune. You'll need:

TurboManifoldWastegate (depending on the turbine)Standalone ECU (Power FC, V-Pro, etc)injectorsFuel Pump Fuel Pressure RegulatorZ32 MAFClutchSomeone to install/tune

Yeah, if you get used parts where applicaple, you could do it for around 2-3k, but new, 3-5k.

Takiie!

[CarolinaR32]

Why do you need a bigger turbo there Skribblah???

[s13_rb25det]

holset hx35 will do a good job

[305_rb]

Not to thread jack but, what would be needed for approx 600rwhp on an rb25. Any links?

Thanks in advanced.

[Carl H]

t51r

[305_rb]

I'd like to have it rebuilt. I was able to find some pistons, conrods, valvetrain etc but, can the rb25 crank hold 600+ rwhp?

[eh?]

Yes the RB crank is forged...look around your area I'm sure there's a few RB25's pushing those numbers.