Which Size Rear Housing?

[Dale FZ1]

The GT30 turbine is marginal for flow capacity on a 3 litre. It is very good but I would only suggest that spec if it's a dedicated road car. Go GT35, Lithium is right.

[Blackkers]

Yep. I'd love to see a HTA3582 on a twin cam RB30.

please someone do it with the neo 25 head for high-ish compression, VCT and decent lift cams in stock form.

Killer response combo with massive boostability. maybe mid 400's rwkw on E85? can't say for sure

[AngryRB]

There would be a power difference but I personally wouldn't go smaller than a HTA3582 on an RB30, remembering that the HTAs spool noticeably better than the GT, the difference between a GT3076R and a HTA3582 on a 3 litre should also not be a huge deal

In the GTX3067 thread it was expected that the compressor wheel being small would spool up fast, but with the 0.82 rear it would seem to be very on par with a GT3076 meaning that the

GT30 turbine has a big say in how things spool. So in the case of a HTA3582 can you be that confident that it would spool that much earlier than a normal GT3582 based on the GTX3067

results?

To go down the HTA35 route It would have to be giving a good push in the seat around 3000rpm to justify the expense over a cheaper GT3076 on a Dedicated street car, being GT35 hotside

with stock manifolds and pistons it would might not be able to justify itself being there as far as its power potential, and a GT3076 RB30 might leave it behind in the short city streets where the 2500-6000rpm is probably the sweet spot?

that's assuming they don't just leave black lines everywhere.

Edited July 16, 2014 by AngryRB

[Lithium]

Ok, on stock manifolds I would possibly look at it differently... I am not sold on expecting to make good use of near 70lb/min turbos like that.

In regards to the GTX3067R results with .82 housing is in almost no way comparable to this, so many levels of different kettle of fish to this comparison.

If you want a general indicator of comparable HTA versus GT on the same turbine, check out 34GeeTeeTees post on the first page of the HTA thread.

[discopotato03]

I think you need to be serious enough money wise to justify the GT30/35 HTA turbos , at a certain gas speed the standard manifold will become a problem and the larger the engine is the more apparent that would become . Costs would escalate faster with header manifolds and gates and stealth dies a quick death .

Hard to say what size turbo (turbine size) is the limit on the factory manifold . Be interesting to see a 3076HTA and the 0.82 GT30 IW hanging off the standard one .

I think it's impossible to say that the GT30 turbine limits an RB30 because no ones ever tried one in the largest 1.06 IW turbine housing AFAIK . Again back to questionable turbine maps but the GT30 1.06 combination is vaguely similar to the GT35 0.82 combination . I reckon GT35 turbines are fine for driving 82mm compressors and maybe even the GTX76mm one but the GT30 doesn't do too badly on the 76mm GT or HTA compressor wheels .

If Mick o screwed 330 wheel wasps out of his RB25 with a 0.82 GTX3071R we know the stock manifold is at least that good . We don't know what a 1.06 GTX3076R or GT3076HTA would be like with this manifold on an RB30 , it may do even better .

Actually , RB30 would lift the turbo up off the engine mount with the HKS cast RB20/25 manifold . Mmm interesting possibilities and I got me one of them .

A .

[34GeeTeeTee]

Didn't Simon try a GTX3076 on the RB30 and said it ran out of puff? Its been a while since i checked his thread though...

[juggernaut1]

PJ's dyno running a GT3076/3037 with HKS 1.06 (from memory) ex hsg on an SR20.

Over 500hp on E85. From memory it set some kind of Australian quarter mile record at the time in that state of tune.

Edited July 16, 2014 by juggernaut1

[34GeeTeeTee]

Yeah both Dave and I ran identical power on an RB with the GT3037/3076..... 363rwkw is where they stopped! Same dyno etc... This was with the 0.82 rear housing!

[juggernaut1]

Pretty sure the HKS ex housing (as used on PJ's car) on are only T25 size so amazed the small inlets can flow that power.

Edited July 16, 2014 by juggernaut1

[discopotato03]

HKS did non gated T25 flanged GT30 turbine housings in 0.61 0.73 0.87 1.01 and I think 1.12 .

I guess this proves that the port through the T25 flange is big enough not to be a greater flow limiter than the volute passage .

The thing is that little flange wouldn't work too well if it had 6 runners merging into it .

Years ago someone in the States had a GT3037 52T in a HKS T25 flanged 0.73 housing and the tubular manifold was quite involved . Being in a FrWd Sentra B13 with an SR20 the manifold had the turbo out over the boxes bell housing and the ext gate was between the merge and the turbine housing inlet .

HKS housings had better formed passages and nozzles than Garrett production ones and looked more like the Tial ones of today .

Also people the "GT35" turbine housings are really machined out GT30 castings , the only GT35 turbine housings I've ever seen were diesel spec ones and they were probably GT40 housings with enough meat to take the smaller 35 wheel . Bitzer - GT3540 .

A .

[Dale FZ1]

I recall there was a R33 time attack car that made a change to the 1.06 housing, still on RB25. Can't recall whose thread it is in.

I agree the GT30 1.06 IW combination should do the job on a RB30. Wanted to go down that line with mine. Cost and availability of housings at the time weren't good and other demands of practicality/service dictated that the solution was high mount/external gate and stealth wasn't part of the mix - easy spanner checking of fasteners and easy removal of components was far more important.

With a few horror stories of the GT3582 failing on high boost setups, I think I'd steer to something else if chasing 500rwhp.

[juggernaut1]

With a few horror stories of the GT3582 failing on high boost setups, I think I'd steer to something else if chasing 500rwhp.

Enter the GTX3576 on E85 and GTX3582.....

Edited July 17, 2014 by juggernaut1

[scotty nm35]

Gregs one did ok on his RB28, my old flogged GTX3076 managed 380kw on his auto with a stock engine bay, externally gated .82 Kando housing. Surely there is an easy 450kw in it with the right setup (1.06 rear) in a manual.

I think with the larger housing it would be perfect for a 30.

[Dale FZ1]

I agree with the GTX3576.

I don't see the sense in flogging a turbo to the point of failure.

Comes a point when the GT37 range makes sense though, ask Fineline for experiences on that.

[Lithium]

With a few horror stories of the GT3582 failing on high boost setups, I think I'd steer to something else if chasing 500rwhp.

That's weird eh - then you have 34GeeTeeTee burning around every track day he can with an HTA3076 making 500+whp and not exactly holding back with no issues

EFR all the things

[34GeeTeeTee]

That's weird eh - then you have 34GeeTeeTee burning around every track day he can with an HTA3076 making 500+whp and not exactly holding back with no issues

EFR all the things

All the track days

[scotty nm35]

Mmm, I've done 6 track days with my Garret pushing 40psi up the straight... Why not flog a turbo hard?

Perhaps we shouldn't be running turbo's at all, I mean it's just another part to fail right?

[34GeeTeeTee]

Mmm, I've done 6 track days with my Garret pushing 40psi up the straight... Why not flog a turbo hard?

Perhaps we shouldn't be running turbo's at all, I mean it's just another part to fail right?

All the pushrods!

[juggernaut1]

Gregs one did ok on his RB28, my old flogged GTX3076 managed 380kw on his auto with a stock engine bay, externally gated .82 Kando housing. Surely there is an easy 450kw in it with the right setup (1.06 rear) in a manual.

I think with the larger housing it would be perfect for a 30.

One of the Ford boys on Xr6turbo made just under 450rwks with an internal gated GTX3576 (1.06) through a ZF on E85 with just a tune, injectors, cooler and exhaust so the compressor is able to flow that sort of power.

[lcxu105]

Has anyone used one of these. http://m.ebay.com.au/itm/181543403816?nav=SEARCH