Lithium

Have been in an EVO running a twin scroll 1.06a/r GT3582R, the spool is seriously seriously impressive.... I have a .82a/r GT3076R and I'd honestly not expect to feel too much compromise going to a T4 GT35R.

^ Fully agree with all the above, though I would highlight that the GT-RS as something that you should try for 250kw as an absolute max - some people like to think of them as something you can push up to 20psi but I really wouldn't run one much beyond 1bar, personally. Not with that little turbine flow on a 2.5litre... I'd treat it as a stock turbo setup that the RB25 should have received in the first place.

Cool, cheers for the pic - as DP said, be interesting to see the hotside... Yeah mine definitely has full boost before 4000rpm, I am really hoping to get it on the dyno soon and get a proper tune in so I can provide a sensible power and boost curve for it.

Very nice - got any pics of the new turbo? What I find strange is it sounds laggier than my GT3076R...

Haha yeah I think we understand each other Will have a look when I got home... Something I would be curious to see, is a stock turbo RB25 setup running E85...

On the GT3071R vs GT3076R 56t vs GT3076R 52t - I'd be interested to see if anyone can bring out a dyno plot which shows evidence of a GT3071R/GT2835R coming on conspicuously faster than a equivalent turbine a/r GT3076R.... before hypothesising that the GT3076R has a major fault in spool versus power production on an RB25 it'd be good to determine how weak it is down low compared to the next smaller. I am sure its gotta be worth some salt that HKS chose to supply a 56t compressor with their GT3037 units designated for RB25s, they weren't the silliest bunch and they obviously had the option of a 52t version. I am reasonably sure there are people on this forum who have gone from GT2835s to GT3076Rs as well, instead of working on theory - surely the people who have been there and done that would be a good indicator? For what its worth, me and a mate running a healthy stock turbo R33 (FMIC, S-AFC etc) did a very scientific test the other day - accelerate hard from 70kph in 3rd gear side by side, with my car running straight wastegate boost. He pulled about a foot or so on me before mine made up the boost difference and started pulling him back. OK it could get more in depth than that, but ALL of the options we are discussing will be laggier than a stock unit - and pulling from lower revs than you'd ever "play" from (unless you completely fail at driving) the stocker hardly has a huge edge over a .82a/r 56T lag monster in a real life comparison, I think there are unnecessarily twisted undies. Just get a 56T GT3076R, if you are too ponsy for that lag then stay stock, if you are unsure if the lag is worth the power then get a GT3582R and know that at least when the lag is over you have a very real risk of dying.

Haha don't worry, I figured there was more to the story than I picked up on - but you gotta know to understand The converter thing makes a lot of sense, I've not really been exposed to them before but have seen quite a few dyno plots from auto cars which look like that... hadn't really thought too hard about it so cheers for the explain. Sounds good, and sounds like there is more party to be had which makes me happy - looking forward to hearing what she does when you hit the strip with the latest setup!

I think housings aren't the primary place the worries lie, though one of my mates inadvertantly did a burst test with an HKS T51R SPL and it proved to be pretty safe haha

Don't get me wrong - 335kw is a good level of power, but I would have thought even on a low reading DD and through an auto - 335kw would be a bit low for a built/cammed RB25 on E85 running 22psi and revving to >8000rpm? And mid 5000rpm for full boost, even with a 1.06a/r hotside? That, and the fact the power goes flat makes me wonder if something weird is going on - trans slipping, or an air leak? Either way its clearly got the goods to go fast, but I really was kinda expecting more power than that. Feel to set me right if I am missing something. Was there any reason you didn't go for a more aggressive boost level?

How does direct injection work with turbocharging? Does it make any difference, I haven't noticed any forced induction DI setups before - but otherwise the VK56VD seems quite cool. At the very least, a VK50VETT would be awesome but I thought I'd refer to an engine which is comparatively obtainable haha.

HERETIC! VK45DE... ohhh yeah....

Mine too: And my car racing a 500kw @ wheels R32 GTR:

Neat idea, where in the country are you aiming at doing this?

http://en.wikipedia.org/wiki/Convicts_in_Australia Thats why all the best Australians are Kiwis

Here is one of the loose runs from the weekend:

Weather was pretty aweful, they didn't get a clean run in that I am aware of. Fastest time I heard was 8 flat, I ended up getting sick of the weather and left so didn't see any of their runs. RIPS left without having a go, as well.

It'd be very helpful to know what you are hoping to get from it? I am guessing from the lack of high spec engine mods being listed and only 555cc injectors, you aren't aiming for way more than 300kw @ wheels. I am at work and can't follow that link, but I can say that a 64mm inducer is not normal for a Garrett GT42 - so I can't help but be dubious of how genuine it is, and on top of that any GT42 based turbo is WAY overkill for a 300-350kw setup, it will be laggy as. Even a 64mm turbo is overkill for that...

Just for the interest of those that way inclined, the lads seem to have been busy with the new bigger turbo setup and have done some testing at the strip and some suspension/alignment tweaking to get the car down the strip better and one gets the impression that its all heading in a good direction. Last weekend Reece ran a single full 1/4 mile pass and recorded a 1.19s 60ft time (which is its best on NZ soil) on the way to a 7.8 @ 177mph. This run was done with too much clutch, so there was plenty available power not making it to the tyres - as many here would know the car is capable of >190mph trap speeds when the boot gets really put in so fingers crossed there should be some fun times ahead. This weekend in the NZ Four and Rotary nationals event, with the drags on Sunday - fingers crossed there may be some interesting results to report for both the Heat Treatments guys and also Robbie Ward who will be racing his RIPS FED, which has to date run a 7.4 but I quietly suspect that it has a bit more in it yet

Really would have loved to have seen what it would have run on a GT30R, I am really confident on a clean run it would have rewritten a few viewpoints on what you can do with a GT30R. That really could be 10s power with the right situation.

Need an RB26 with a GT4088R to compare results with here

Sorry I meant rated, hit Garrett up about the semantics as they are the ones who rated it to 400-700hp. GT4088Rs aren't as big and nasty as a lot of people seem to think... not that they aren't big and nasty, but

GT4088R is suited for 400-700hp, GT2530s are as you say 320-350hp x 2 = 640-700hp. You reckon that it sounds far fetched that GT2530s would be more comparable to a 700hp turbo setup than a 600hp one? And before you jump up and down about it, I've driven cars with GT3582Rs and GT2530s and if you had a roll on from "the basement" in 1st gear between a GT3582R .82a/r single entry (let alone a TS one) and a twin GT2530 GTR, I'd happily bet a hunger buster combo that the GT35R GTR would be gone before the GT2530 setup was wound up so long as all else were equal. In regards to the "How i cringe when the ole Mines comparo gets thrown around.... Mines is running what... different diff's, superlight driveshafts, and i think different gearbox gearing. Its more about what is going on behind the motor than what is attached to the side of it."... well yeah, of course - that was the point I was making. Despite what a lot of people seem to think - the power level and how soon it comes on is not the final word on how the car is going to perform on the track. An early spooling turbo would make life easier, but realistically if you are going for real fast times then the odds are you'd be looking at more revs, aggressive gearing and hearty power levels. A GT40 based turbo + big cams moves the rev range up, but the working area of the rev range would monster your typical GT-SS setup - just will also be harder on the attached bits, including driver.

The Mines R34 GTR is one of the best "street"/track monsters ever and that uses GT2530s which are more comparable with a GT4088R than a GT3582R in spool, imho.

If I were going for a fast RB26 powered car and a GT35R wasn't going to cut it, I'd be running a .95a/r twin scroll GT4088R for sure. I'm hoping to catch up with a mate of mine this weekend who is running the same cams as you and a 1.06a/r GT4094R (should be quite a bit laggier than a 4088R) on his stock displacement RB26 and go for a jaunt in that. Its only running 13psi at this stage, but I should be able to get a good impression of spool etc.

PS, f'en ROFL at the banner ads