Rb30det Gtr Turbos?

[RBCalais]

Hey everyone,

My RB30DET should be finnished in a month or so. Now I have got to decide on a turbo/s,

Its only got a NA ACL VL rebuild kit, 25DET head with VCT, E6K Haltech, 550cc, fmic and 3"exh, so I dont want anything too hardcore. But I was hoping to get near the 280-300rwkw mark, would this be possible with R32 GTR turbos or would I be better off with 2 RB20DET turbos or a big single?

I wasnt sure if I should put this into the Conversion thread but i decided not too cause its allready to big without everyone elses plans etc...

Edward

[R31Nismoid]

So what pistons are in the N/A kit... ??

are they forged or what?

Depending on that, depends on the answer

[ferni]

I don't know that much about power figures with the 3litre bottom end. But i'm a bit confused, your putting a RB25DET head on? these are single turbo not twin.

I'd probably go for a single turbo, specs i wouldn't have a clue.

stock GTR turbos make around 250rwkw on the RB26, but thats pushing thier limits at 1bar, so i'd think they'd struggle to make 280-300 even on a 3 litre bottom end... you'd need something bigger.. you've got the displacement to spool it up

[Ronin 09]

RB26DETT exhaust manifolds will not fit on the RB25 head - you'll have to get custom manifolds if you want to use GTR turbos.

"GTRGeoff" built some for his RB25 head.

[RBCalais]

Yeah I realise that, I am going to use get custom manifolds, and theyre not forged pistons but considering a few people make 270rwkw on standard factory internals, I am not worried about pushing the limit.

The engine has been pretty cheap really should be built under $1500 including head rebuild and machineing etc., if I get twins then it will still be cheap and be a good street car if you know what i mean.

Edward

[grim32]

are they duralite pistons in the kit? id go for a single turbo that will bolt to the rb25 manifold, talk to gcg, they should be able to help you out with turbo selection

[RBCalais]

Yeah they are duralites. Would anyone have any idea what sort of power twin GTR turbos would make on the 30DET?

[gun32gtr]

no good over 1bar so better of with single,to4 maybe?

[Cubes]

Yeah they are duralites.  Would anyone have any idea what sort of power twin GTR turbos would make on the 30DET?

<{POST_SNAPBACK}>

Turbo's can only flow so much air.

THe GTR turbo's will make the same power on the RB30DET as they do on the RB26DETT.

Only difference being is the 3ltr's will spool the turbo's quicker, 'average' power will be higher and peak power will be made earlier in the rpm.