Whos Interested In The Gt3076r/gt3037 In 52 Trim ?

[scotty nm35]

I'd suggest you try to have a look at the two housing types, say a GT30 0.82 split pulse, and a GT30 0.82 single scroll.

Make sure you have an engineers ruler, and or a set of verniers, and even get hold of a couple of small thick wall pipe sections in the size you think you'll need. Do some research on what size steam pipe bends are available because that's what your fabricator will need to work with. Then after you've measured the size of the scroll where he will be cutting into, try to imagine how that can be married up to the pipe section. And be prepared to explain to your fabricator how he will do it - because the sizes are such that I'm pretty sure he won't see it as achieveable.

Single scroll will be a different situation - they can, and they do fit EW setups onto the housing. There are those who swear by them. That sort of setup must work, but it's got to be limiting if you ever want to try a different spec (even just an A/R change in housing for your existing turbo).

So for a split pulse GT30 onto RB engine, your realistic current options are

1. Get a fabricated manifold to suit the Evo spec IW housing. Bonus is that there are two housing sizes available. Run with a 6Boob, ETM, or even the Kiwi-made Hybrid manifold.

2. Get a fabricated manifold to suit an EW setup. Ideally there should be two gates, and you're going to have fun fitting all the exhaust plumbing into a limited space. Best bet for this one is find who supplies this setup already done, otherwise you're paying workshop rates for someone to figure it all out.

His fabricator should have no problem with it.

For someone that was looking heavily at exactly this as a cheap and worthwhile solution 6 years ago, you seem to be pushing the expensive manifold options now, any reason you dropped it?

[GTScotT]

FYI I recently called 6boobed Kyle about a manifold with alternate evo flange and unfortunately he wasn't interested. He would only do odd flange types if they were basic single scroll options IE evo 3 or tial v band.

As for cheaper manifold options I have seen a couple of cheaper manifold based setups go wrong now and I am of the personal opinion the manifold was to blame. Physical damage scenario. Better to stick to a trusted item at the moment as warranty on cheapies is limited.

[scotty nm35]

No Scott, not 'cheap' manifolds, he asked me to modify the split housing for external gate, so it can be bolted to the stock manifold. As the power goal is a responsive 300kw it should pose no restriction...

Kyle won't change his design because it would mean making a new jig.

[discopotato03]

Twin scroll collectors for a six cylinder engine involve a lot of time consuming work and thats probably not something your average Joe can see or want to pay for .

Most people would be more than happy with the performance Mick o got from his RB25/factory exhaust manifold and that combination would be hard to beat on price . The Rolls Royce option would probably be a Garrett TS T3 flanged twin integral gate turbine housing like their Evo 10 GT30 housings have .

Thats about as far as I think you'd get with the std manifold and whilst It may not make that much more total power the overall spread and delivery is in theory better .

Back in the real world its a lot less grief to just put together a system that gets you the power you want with minimul turbo lag . The fact that you can make lots of bolt on power is a big plus .

A .

[34GeeTeeTee]

If only i could change my rear housing and gain response without losing top end power lol

[GTScotT]

No Scott, not 'cheap' manifolds, he asked me to modify the split housing for external gate, so it can be bolted to the stock manifold. As the power goal is a responsive 300kw it should pose no restriction...

Kyle won't change his design because it would mean making a new jig.

Sorry mate I was referring to the recommendation to consider something like the NZ Hybrid type manifold.

I fully support the move to have you mod his ewg housing ala ARTZ.

[scotty nm35]

Do you see any drawbacks? I recall there is a slight split in the divider of my manifold at the flange, is the rb one the same? It shouldn't affect things too much though.

As for evo footprint manifolds, I will be heading down that path soon with my 2.4 stroker 7. I was going to make a t3 mani for a gtx3071 but if this works as I imagine, I might try it myself. I don't like internal gates.

[GTScotT]

Do you see any drawbacks? I recall there is a slight split in the divider of my manifold at the flange, is the rb one the same? It shouldn't affect things too much though.

As for evo footprint manifolds, I will be heading down that path soon with my 2.4 stroker 7. I was going to make a t3 mani for a gtx3071 but if this works as I imagine, I might try it myself. I don't like internal gates.

With the FP units on the market I really dont see any place for a GTX on an evo lol

[scotty nm35]

So I keep getting told. Why would a fabricator bolt on internal gate turbo when there are so many other avenues to take.

[Dale FZ1]

His fabricator should have no problem with it.

For someone that was looking heavily at exactly this as a cheap and worthwhile solution 6 years ago, you seem to be pushing the expensive manifold options now, any reason you dropped it?

No disrespect to you Scott, if you are doing the work for him. I'm aware of the dimensions of the scrolls, and the likely/available pipe sizes that would be employed if modifying a "free floating" type housing to take external gates, and don't see that as a particularly viable option. There's not a lot of cross-sectional area in each scroll at the likely point you'd cut in, versus the size of pipe you'd be using to feed the wastegates. That said, I am not a fabricator - perhaps you'd modify the manifold?

Disco seems to get the thrust of my comments - at that 300kW mark the best bet from a cost:benefit standpoint is to run with an internally gated, bolt-on setup. Anything else means spending time and real $$ to get it set up right. I do feel that an external gate setup IS better because - provided the design is a good one - better/more flexible boost control is possible. That is why in some earier discussion about Disco's options I indicated knowledge of two members who had difficulty running less than 19psi from a 0.63IW GT30.

My position is as steady now as in '07 - practical and cost efficient setups should rule. Manufacturers are knocking out some pretty cool gear these days, and there are undoubted benefits to split pulse (Evo, Mini) and compound turbochargers (BMW, VW) - but I don't see great need to go there. The question was posed about split pulse, and the intent was to point out complexity and expense (whether IW or EW) in going that path simply to achieve bragging rights of technical superiority. I wouldn't push anyone down the path of an expensive split pulse setup, but if they feel compelled to do it that way, it should be done properly - as you point out that is an expensive modification path.

I'd rather see the extra funds diverted into making sure the grunt can be put to the ground - diff/tyres/suspension. People mention 300kW like it's nothing amazing. In my view, achieving that figure on an RB25 is relatively straightforward and thare are a good range of options to get there. Being able to do something with it is a whole 'nother subject.

[scotty nm35]

So my bolt on viable option might be of interest to a few of you? We shall see how it turns out I guess.

This one will be single 45mm gate with a single split feed, (similar to BW's internal.) Cost wise it's just as cheap as Artz's Kando external with perhaps better spool, hopefully comparable to Owenliberts results. (all in by 3500) Will be interesting to see how it goes anyway.

[Dale FZ1]

So my bolt on viable option might be of interest to a few of you?

Will be interesting to see how it goes anyway.

Yep, it is interesting - thumbs up for backing yourself and having a go. I hope it is a good thing.

[discopotato03]

Well if you can find a way to do it thats not too costly or difficult more power to you . Many have tried and fail to do so mainly because the ext gate stands out like the proverial or they have thermal issues and cracking . I think if you want cost effective to a degree the way is to beg/borrow/steal that HKS cast low mount manifold and go from there . Possibly even do something with the rare RB26 version of this manifold because of its larger ports particularly into its T4 turbo flange . I think the only other way is to make a manifold to suite the Evo 10 GT30 turbos flange . Maybe speak to Geoff Raicer of FullRace though he'll very likely say buy an off the shelf EFR turbo with T4 flange and twin integral gates . I sure he could make an Evo flanged manifold if you really want one .

I don't want to go into the GT30 TR30 turbine debate again , simpler for Garrett to have a few more GTX compressors to close up the gaps in their range . I think the GTX3067R was easy to bash together because they had the bits to GT30 a GTX28 turbocharger . Had it been a clean sheet approach it may have had a 69mm GTX wheel of ~ 50 pounds flow and a bit more usefull as an entry level GT30 IW turbocharger , IMO anyway .

A .

[scotty nm35]

I realise you are speaking generally, but this setup has specific goals, and I doubt a T4 is required for that 300kw target. It must utilise the stock mani, and the 3037 has already been purchased, other than that he wants the best spool possible, and I think the .82 split housing will do that (from what I remember of Owen's graph) It's not rocket science.

A full race manifold would blow the cost out 10 fold. lol.

As for cracking, Artz has tracked and thrashed his Scotty modified Kando for years with no issues. I can't see sticking a divider into his design would change anything.

[AngryRB]

The stock manifold has been ceramic coated and the turbine housing will cop the same if it makes a difference

[discopotato03]

Yes if you can keep the heat in the gas rather than heating the manifold and turbine housing it does help .

In some ways I look forward to tuning with a larger turbine and housing because I fiddle a lot to get every last Nm I can out of part throttle running . Something a little unusual happens to mine over 3000 and I'm not sure if its tuning or the GTRSs erm modest exhaust path .

A .

[scotty nm35]

More likely the internal gate leaking Disco.

[ARTZ]

So my bolt on viable option might be of interest to a few of you? We shall see how it turns out I guess.

This one will be single 45mm gate with a single split feed, (similar to BW's internal.) Cost wise it's just as cheap as Artz's Kando external with perhaps better spool, hopefully comparable to Owenliberts results. (all in by 3500) Will be interesting to see how it goes anyway.

more spool my ass and if it does its because of cams and gears...pretty sure some cam gears will wake mine up a lot earlier too

I realise you are speaking generally, but this setup has specific goals, and I doubt a T4 is required for that 300kw target. It must utilise the stock mani, and the 3037 has already been purchased, other than that he wants the best spool possible, and I think the .82 split housing will do that (from what I remember of Owen's graph) It's not rocket science.

A full race manifold would blow the cost out 10 fold. lol.

As for cracking, Artz has tracked and thrashed his Scotty modified Kando for years with no issues. I can't see sticking a divider into his design would change anything.

yep cars still running good not one weld cracked and there is lots of em..

anyway sell 3037, buy t67 with 6boob = winning...stupid garret fanbois

The stock manifold has been ceramic coated and the turbine housing will cop the same if it makes a difference

has it been ported...pretty sure mine has another 20kws in it with some good manifold porting...the few cars i have seen that have pushed 330-350 on stock manifolds have all had good port jobs...I know Abe was pushing 350+ with his and a HG turbo and mick-os was ported too iirc...

either way thats my next mod + (maybe)HGs billet wheel + cam gears and I think I have quite a bit more to offer , quicker spool, more top end...MORE FAST!!!

[scotty nm35]

more spool my ass and if it does its because of cams and gears...pretty sure some cam gears will wake mine up a lot earlier too

I think you guys need to revisit Owen's dyno graph with the .82 split rear. Now how to find it... Here is the petrol one, I couldn't see the 350kw ethanol graph.

Have you seen a 76 spool like that before? The 6boost with it's large runners wouldn't help it out much, believe me. Even Stao mentioned the stock manifold is a response monster.

[ARTZ]

yeah but owen had a 6boob and plazmaman..its hardly a fair comparo...and if staying stock manifolds and inlet its hardly going to make 350kw so why not just use a smaller turbo for same spool results...

anyway enough jibber jabber, just build the thing Scotty and prove us all wrong