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ohat do you want? Yu need to set a power goal... give some more information to make this a reasonable questions.

To be honest, the fastest on the market on an RB25?

the RB20 NICS turbo, its the smallest thing iver ever seen.

Wont mean you'll make any power though

post more detailed question please

If you want response, just stay with the standard turbo and get a good exhaust system. I have full boost at 2300rpm, and have boost from 1200rpm onwards. It's great to drive like that, but I'd prefer to have something that spooled at double the revs but pushes out twice the power! :O

Mate the stock turbo spools great but because of the ceramic wheel they cannot be boosted hard and they run out of efficency after roughly 1bar anyway. You could put a smaller turbo on and get better response but boost will trail of high in the revs as will power. The stock is good for 200rwkw with supporting mods and anyone who has done this can tell you really notice the difference from stock.

To be honest, the fastest on the market on an RB25?

the RB20 NICS turbo, its the smallest thing iver ever seen.

Haha, yeah there pretty tiny. Here's a pic comparing the RB20 NICS and RB25.

rb20vsrb25.jpg

why would you want to sacrifice top end?

leave stock turbo,put FMIC and straight though with NO cat not recommended though.or swap your rear turbine housing

my rx7 the thing use to spool up quick but by about 6000rpm the boost/power dropped so it just screamed but couldnt move...

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