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Series 1 has ceramic impellers = slightly slower spool up but can take higher boost.

Series 2 has plastic impellers = slightly faster spool up but cannot take as high boost.

Which is better?....How long is a piece of string? Decide what your objectives are, then work how you are going to get there.

Guest Yoda
:P why dont u get an aftermarket turbo? If you 'trashed' your series II, i assume its from running too high boost for it, so y not get something like an HKS GT2540 (what i got). it goes well, plenty of puff, garett guts (steel turbine, and ball bearings). stronger than ceramic or plastic...
Guest Yoda

kaze

uh, will dyno in two weeks when i get to perth. so not sure about output at moment. engine-wise i got: aforementioned turbo, hks blowoff, intercooler (aftermarket), 3.5" exhaust, apexi f'manage, forged pistons, metal head gasket (wont effect output), uh, thats about it i think. oh fuel pump. got other mods, but non engine stuff, like suspension, gtr wing (dont call me gay) wheels etc

Guest Yoda

yeah. sounds good. mine is internal wastegate, but biggest they make (i believe.) after that is the externals. friend of mine, who posts here, has one. hasnt fitted it yet. only thing i worried about is lag. i need a new computer to get most out of my current turbo. cuts in hard and late. like really hard. if i boot it in first or second, the turbo kicks in and the wheels spin. not chirp, spin. :P i getting camber adjusted next mechanic visit which should help. got 255's so cant fit anymore rubber under guards...

How much boost will the stock series 1 turbo take? Im running 12psi tuned with a haltech E6K ecu, FMIC, 3" exhaust ect..

What turbo would you guys recommend for standard internals and also what would you recommend for the rb25 with forgies ect ?

Guest Yoda

came with the car. :P think its 480 hp rated? i'll have to check again. jeff/lumpy at c-red could tell u better. its pretty much a bolt on. i have custom dump pipe made, and got high flow cat, and a/m catback, but u should already have the exhaust by the sound of it. wanna buy my turbo, and i'll upgrade? :D

why don't u hi-flow your thrashed stock SII turbo rather than buying a new turbo with the same possibility of thrashing it again?

if u do NEED a new turbo, based on the info provided by surreal i would say SI as ceramic impellers and can take higher boost before sh1tting itself

Waz.

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