Jump to content
SAU Community

Recommended Posts

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?

Link to comment
https://www.sau.com.au/forums/topic/419058-quick-turbo-question/
Share on other sites

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.

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

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.

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.

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 :P

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.. :yes:

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 ... :D

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 ... :D

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 :yes:

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

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Ok i will get those 310mm. I found one but on a different site. This is the description on those...is it ok? Technical parameters: - Axle: front. - Disc type: ventilated. - Number of holes: 5. - Disc diameter: 310mm. - Total height with center: 54mm. - Thickness (new/min.): 30/28mm. - Designed for brake calipers manufacturer: Sumitomo.
    • You Gregged a whole racetrack!?
    • Look for broken wire or bad connector at the motor. Might not be it, but is worth starting there, as it is easy.
    • Hi everyone, I’m having an issue with my R32 GT-R. Sometimes, when the car goes over a bump or experiences some vibration, the 4WD warning light comes on the dashboard. When I check the code from the control unit in the trunk, it shows Code 19 – ETS Motor. However, everything seems to be working fine — if I turn off the engine and restart the car, the light goes away and everything functions normally. Has anyone experienced this before? Where should I start troubleshooting this issue? Thanks in advance!
    • I'm back from the dyno - again! I went looking for someone who knew LS's and had a roller dyno, to see how it shaped up compared to everything else and confirm the powerband really is peaking where Mr Mamo says it should. TLDR: The dyno result I got this time definitely had the shape of how it feels on the road and finally 'makes sense'. Also we had a bit more time to play with timing on the dyno, it turns out the common practice in LS is to lower the timing around peak torque and restore it to max after. So given a car was on the dyno and mostly dialled in already, it was time for tweaking. Luis at APS is definitely knowledgable when it came to this and had overlays ready to go and was happy to share. If you map out your cylinder airmass you start seeing graphs that look a LOT like the engine's torque curve. The good thing also is if you map out your timing curve when you're avoiding knock... this curve very much looks like the inverse of the airmass curve. The result? Well it's another 10.7kw/14hp kw from where I drove it in at. Pretty much everywhere, too. As to how much this car actually makes in Hub Dyno numbers, American Dyno numbers, or Mainline dyno numbers, I say I don't know and it's gone up ~25kw since I started tinkering lol. It IS interesting how the shorter ratio gears I have aren't scaled right on this dyno - 6840RPM is 199KMH, not 175KMH. I have also seen other printouts here with cars with less mods at much higher "kmh" for their RPM due Commodores having 3.45's or longer (!) rear diff ratios maxing out 4th gear which is the 1:1 gear on the T56. Does this matter? No, not really. The real answer is go to the strip and see what it traps, but: I guess I should have gone last Sunday...
×
×
  • Create New...