Rb30 With Xr6 Gt35

[Gts4RB30]

Hey got a few questions as i started looking through the rb30 thread and the turbo threads and "i" couldn't actually find any info directly related to this. i am building a forged rb30 with rb25de head and fitting a gt35r from an xr6 turbo. what i need to know is what needs to be done to fit it in a r32 as i have read that with a vl you need a spacer for the manifold as not o foul the inlet housing on it and cut the engine mount a bit as not to foul on that either. being that they are for similiar engines i would think so but not entirely sure as i am also fitting a awd adaptor plate to my rb30, and retaing this a a low mount..

thanks any help would be appreciated and moderators of you or anyone else knows of the thread please excuse me as i could not find it.

[Matthew Black]

turbo should fit on factory manifold without spacer cus front housing is smaller on xr6t

[Gts4RB30]

has anyone got anymore info?

[Adriano]

Do you have the turbo and thh manifold?

[Gts4RB30]

will as of the end of this week or start of next y?

[Matthew Black]

engine will fits on r32 engine mounts and should clear bonnet just with side fed plenum,

you will need custom dump pipe,intake and cooler piping.

do you have a some sort of ecu for it? wiring?

also factory 20/25 exhaust manifold works grate i had one that i welded an external waistgate to

Edited February 9, 2012 by Matthew Black

[Gts4RB30]

yeah got nistune ecu just using the xr6 turbo on rb25/30.

just wanted to know that it fits.

Edited February 10, 2012 by Gts4RB30

[Adriano]

It will fit, just depends weather you need a spacer or not. When you have the turbo, try it on the manifold and you will soon know

[Matthew Black]

it will fit

are your going to use external waistgate?

[Gts4RB30]

na man only looking at 1 bar or 250 to 280 is rwkw.

[JonnoHR31]

not a very good turbo choice for 250-280rwkw. a highflow, hypergear turbo or a gt3071 will give you much better overall performance

[Gts4RB30]

not a very good turbo choice for 250-280rwkw. a highflow, hypergear turbo or a gt3071 will give you much better overall performance

WTF how you figure that??? if a 4ltr barra can spin them too 380 to 400rwkw then an rb30 will piss 250 to 280 rwkw out of it and it's bigger then a gt30 which easily does over 300 rwkw.

and my piece of shitt td06 was doing 230rwkw on an rb20, so ABSOLUTELY NO REASON why this won't punch that out.

[Gts4RB30]

it will fit

are your going to use external waistgate?

na mate just going to use the capa 12 psi internal gate and actuator, for a while. the engine is being built to handle 800 hp so i'm basically doing it in stanges, with what i have.

[JonnoHR31]

yer it'll make the power easy but you'll have much less midrange and less area under the curve than you would with a turbo to suit your goals. sure you'll get the number on a bit of paper your after but it'll be slower overall and less fun to drive than a smaller turbo'd rb20 making the same peak power.

[Gts4RB30]

^^^^^^doesn't make sense as this is a 3ltr, it also has bigger cams so i'm expecting it's go to drive like a strong na off boost, and beside i've seen gt3540rs on sr20 with plenty of mid range, the turbo was actually designed for 2.5 to 4 ltr engines so being a 3 i'm kinda right in the middle, and if a rb25 will push a gt30 to 300rwkw and have plenty of mid range i can't see why a gt35 on a over sized forged rb30 would do any less justice. the engine is being built to handle a flogging.

[JonnoHR31]

sorry that was a typo, meant to read:

yer it'll make the power easy but you'll have much less midrange and less area under the curve than you would with a turbo to suit your goals. sure you'll get the number on a bit of paper your after but it'll be slower overall and less fun to drive than a smaller turbo'd rb30 making the same peak power.

[HEKT1K]

Define "plenty" of midrange? GT30 on a 3L will have more no doubt, whether the GT35 is 'good enough' for you is another matter altogether

[TiTAN]

dont expect to be on full boost until 4000 or later with that turbo, or for your power goal a GT30 with 0.82 rear will have you on boost from 2500-3000.

[Matthew Black]

gt3540 is good match for rb30 you will get 250-280kw no worries. then when you get the power bug you got more room for more power easily. at the end of the day that's what everyone does just keeps going bigger and better

it would be good to get a .82 rear for better response but for the price on second hand xr6 turbos you not.

[Gts4RB30]

well see i'm happy with not being on full boost till 4k as it is a family car still and yeah the 35 has more room for me to grow, so that when we get the clubby back on the road i can do with it what i want, i appreciate what you are saying about the gt30 but it will be maxed out before i reach my goal. of 400rwkw. and isn't the midrange also partially governed by the timing and airflow avaliable??? have considered going a smaller rear wheel but it's not right for me atm. i want the car to drive happily off boost and when i want boost stick my foot into it and enjoy the high revs, the head has had some work done to it like cams and 100lb valve springs and the head i'm using already runs bigger valves from factory then the rb25det, how ever in saying that i would like to port match it aswell as a cnc port and polish but funds are now runnig short. i am also looking at stroking further down the track to 3.4 or more as some friends of mine are doing some RnD into 3.6 atm with billet blocks. so in saying all this is woukd be happier with having the room to grow with the 35 then the 30 also please be aware that this is a genuine garrett ball bearing turbo not a copy, so i think i'll get a little bit better response then other gt35's????