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Rb20 Hi-flow Turbo On Rb25

SiR_RB

By SiR_RB,
in Engines & Forced Induction

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SiR_RB Grand Master

SiR_RB

Posted
Posted

i might be able to pick up a high flow RB20 turbo from a mate. it was on his r32 gtst when he bought it, only running standard boost. he took it off to go bigger and he asked if i wanna buy it.

my question is how well will an RB20 high flow turbo perform on an RB25 ? are they too small? will it run out of puff up top?

ive got the usual first stage mods on my r33: full 3" turbo back zorst/hi flow cat (3"), front mount cooler, pod with cai, heavy duty clutch, upgraded coil packs, tuned ecu running 12psi on standard turbo..

the inlet side of his turbo has been machined to fit the larger compresser wheel and the exhaust wheel is steel.

dunno much more about it really, has very minimal shaft play, overall looks in good nick.

will it be enough to get around 210 ish RWKW on my rb25? or am i dreaming

any info would be great, thanks !

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https://www.sau.com.au/forums/topic/298726-rb20-hi-flow-turbo-on-rb25/
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payback21 Community Regular

payback21

Posted
Posted

I have a mate that has a high flow turbo on hes rb20 and it cranks 28psi not a problem. Its crazy!! The car goes like hell....

Im not sure if you can get the same results but it should give you what you want.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

keep in mind, being a RB20 high flow, the exhaust housing is quite small and the turbo will run out off puff towards the red line. Also having a smaller restrictive exhaust housing means you have to relax on the timing a tad.

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