Quick Turbo Question

[AngryRB]

Ive been toying with the idea of a turbo conversion on my xr6 AU ute.

Question is , how would a GT3076 1.06rear with external gate compare to a gt3582 with 1.06 internal?

Goal is maximum torque and lowish revs ( under 4000rpm), power 250kw max

I hear the gt3582r doesnt make much noise, id like this thing whistling its tits off so gt3076 is what im leaning towards, but im thinking theres a 10lbs/min difference at say 12psi so thats going to have an effect on the way it drives.

thoughts?

[R31Nismoid]

The motor isn't exactly the same, but it ain't far off in terms that it's a 4L and the GT35. The motor is nearly 40% larger than a RB25 where a GT35 comes on ~4400rpm

Factory BA/BF XR6Ts end up making around 220-250rwkw with the GT35 and come on well under 4000rpm mate, it just doesn't feel like it because the motor is so large making it nice and linear.

They also don't "whistle" simply because of the factory airboxes, low turbo RPM, standard comp cover - and it's not needing to run 20psi (nor would a GT30). You put a pod, metal intake - you'll get more sound from the turbo.

[AngryRB]

would there be much difference if the gt30 was running 10psi and the gt35 7psi or would the gt30 build too much back pressure and have to be detuned to compensate? im thinking the gt30 would be more responsive and compact due to the gas converter sitting near by

[R31Nismoid]

GT30/35 are virtually identical in size (just depends on the comp cover, there are different options etc etc. There is no real space saving

[ARTZ]

3582

LPG has great knock resistance too

[*LOACH*]

If you can, have a look at direct LPG injection too. I believe there has been a fair amount of work done with them on the Ford sixes. Direct LPG keeps the LPG as a liquid until it is expelled from the injectors. As it turns into gas it cools the combustion charge which lets you make more killerwasps. The current setup you have allows the LPG charge to turn into gas much earlier in the intake tract and the cooling benefit is lost. In addition direct LPG allows greater precision in the tune which again will allow greater power/better fuel efficiency.

[AngryRB]

The motor isn't exactly the same, but it ain't far off in terms that it's a 4L and the GT35. The motor is nearly 40% larger than a RB25 where a GT35 comes on ~4400rpm

Factory BA/BF XR6Ts end up making around 220-250rwkw with the GT35 and come on well under 4000rpm mate, it just doesn't feel like it because the motor is so large making it nice and linear.

They also don't "whistle" simply because of the factory airboxes, low turbo RPM, standard comp cover - and it's not needing to run 20psi (nor would a GT30). You put a pod, metal intake - you'll get more sound from the turbo.

what kind of boost do you think would be sensible for this setup with everything standard then? hoping 10psi should be fine without being silly with it, probably will convert to E85 for the fuel part, and switch over to LPG for the cruising/economy side of it which obviously Is wont be hard driving.

[ARTZ]

I remember seeing somewhere old foulcans with turbos on LPG running 10s with stock s/h taxi motors...thing is you can wind silly amounts of timing in so the knock resistance of LPG would allow you to run a big turbo (much bigger than 3582 anyway) and you can wind a heap of boost in to cover that hole in low down response...for eg run a to4z or bigger maybe at 2 bar....the high boost and big engine Will give you reasonable response down low and still have killer top end..maybe if you have it setup so that it drops off boost in upper rev range so you don't grenade the motor..

Am I on the right track here ??

I mean if your going to waste your time boosting a hey you foulcan,instead of just buying a BA..you might as well do.it good

[AngryRB]

dunno if we on same page .. lol..

i bought this xr6 tray back for $1200 reparable write off , its really nice condition and has 1yr old duel fuel setup and nice red, just put 18inch ford rims on so looks nice, just needs a front end fix up so im thinking a couple grand for that and a few grand for turbo conversion,

id like a unique looking older car anyway cause i like old school stuff that dont have so much plastic, and being a daily driver i just want some extra torque and to hear a turbo whistling away, no plans for thrashing it much.. want it to be a reliable workhorse, the rb serves the thrashing duties..

[ARTZ]

I'd still go large on LPG, just cause u can...just because its running 2bar of boost doesn't mean you need to thrash it..and it won't cost much more either way it Just means you will have a shitload of power with room for improvement ...

[AngryRB]

I'd still go large on LPG, just cause u can...just because its running 2bar of boost doesn't mean you need to thrash it..and it won't cost much more either way it Just means you will have a shitload of power with room for improvement ...

thanks for the replies, a gt3582 from hypergear sounds like the cheapest quality option then, and convert to E85 and have a spike onto boost, so potential for 400kw down the track, but be happy with 230-250kw for a start.. id do a build thread but this is a skyline site and it will take alot of time on a budget

quite excited how it will go, im not that into falcons really but with some personal touches it seems alright and reasonably stealth