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does APEXi make Power FC for RB25DE?

mmmskyline

By mmmskyline,
in Engines & Forced Induction

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mmmskyline Apprentice

mmmskyline

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hi all, i'm contemplating on a turbo conversion on my r32 gts25, to date the engine mods on it are, tomei cams, 6:2:1 aftermarket extractors, 2 1/4 inch exhaust all the way no CAT, i'm thinking if i turbo the car i would like to use Power FC, but i'm told that Power FC only made ECU for specific engines, eg. RB25DE or RB25DET

I will probably be using a r34 gtt turbo, and manifold or maybe custom made manifold, how much boost can these turbos handle? I'm wanting around 1 bar, would i need to get the turbo modifed for steel compressor wheel for this boost level? if so this would in turn tend to lag a bit, this brings me to my next point of compression ratio and forged pistons....

I also have a few questions about the compression of RB25DE, they are 10:1 from factory, I'm thinking of keeping it the same compression is this ok? if i were to use good aftermarket forged pistons which are made to suit 10:1 would that make it much better for the engine, I also noticed that the factory compression ratio of a RB25DET is 9:1, is there 'that' much of a great difference in this? 10:1 and 9:1 is only 1 off.

any advice would be great, thnx in advance

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skyla Community Regular

skyla

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Originally posted by mmmskyline

I also have a few questions about the compression of RB25DE, they are 10:1 from factory, I'm thinking of keeping it the same compression is this ok? if i were to use good aftermarket forged pistons which are made to suit 10:1 would that make it much better for the engine, I also noticed that the factory compression ratio of a RB25DET is 9:1, is there 'that' much of a great difference in this? 10:1 and 9:1 is only 1 off.

you can keep the compression ratio 10:1, but you can only run relativly low levels of boost, I might be wrong, but I think it was about 8psi tops, any more boost and you start running into problems.

Nismodified Proficient

Nismodified

Posted
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i think the stock CR for a turbo is 9.5:1, stock is 10:1, as said by skyla.

and yes, it is a fairly big difference, responsiveness is affected. Think of a turbo car in its lag range, thats what it would be like.

SOrry to go off topic, but can you give us any information about your tomei cams likes cost, dyno sheets, the impressive it made on you etc..

geordie Proficient

geordie

Posted
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yeah im keen to hear what sort of power gains you have made out of those cams. You got same car as me lol, yours 4dr or coupe, mines coupe, i plan on doing a few n/a mods, get the power up a bit. So yeah same q's as nismodified, cost, power etc. Cheers

mmmskyline Apprentice

mmmskyline

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most of the performance mods were done by the previous owner of the car, who used to be in SDU also, so i think u'll have to ask him, he's kennydead on SDU forums

i think he told me he scored those tomei cams for free, coz he has a mate in japan who works around tracks or sumthing, and when the japanese go race or drift the cars, and sumthing even remotely 'out of tune' they'll throw sum of the near new parts away, these tomeis had only been used for a few laps so i'm told, and they threw it out, so his mate asked him if he wanted it, suits the RB25DE lol,

dyno, i think it made 110rwkw last time dynoed, not sure if that was with all the mods currently on it, but yeah, very smooth driving at the moment.

he's also currently doing a project car, r32 gts25 also , turbo'd it with garret t04E ( i think), steel compressor wheel, running standard 10:1 CR, very responsive, very quick, he says with a good tuner the CR can be kepts high

mmmskyline Apprentice

mmmskyline

Posted
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Posted
Originally posted by geordie

yeah im keen to hear what sort of power gains you have made out of those cams. You got same car as me lol, yours 4dr or coupe, mines coupe, i plan on doing a few n/a mods, get the power up a bit. So yeah same q's as nismodified, cost, power etc. Cheers

me coupe as well, got full GTR body kit with the GTR wing as well, gunmetal color :(

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