Lithium

13.3 @ 112mph I'd post a time slip but its a huge pic. That was done with no boost controller it was effectively boost creeping, until it finally reached 1bar and it would stabilise a bit. I needed to be well into 3rd before it reached 1bar of boost, so first gear was no/hardly quicker than with a stock turbo (running 11psi pretty much) and then built up from there. By 3rd is was starting to stomp. Since then I have put an AVCR in it and the comparison is night and day from back then - on the dyno it makes pretty much no peak power difference, just that in first and second it all comes in and the midrange feels WAY better. It was also lagging a bit on each gear shift prior to the boost controller

Yeah thats a fairly good point, if thats in 2rd - mine gets a lot more savage than that and romps through second. Makes the pretty noises too, but probably a fair bit cheaper setup - and only running conservative boost. The GT2835 vid posted in this thread sounds like it'd give it a spank Heres a clip with mine when I got the internally gated housing, before I got the boost controller for it: http://www.youtube.com/watch?v=1tajFNv_q7Y

This is interesting to me - GT3071R and GT3076R being capable of similar power, cases I have seen at least the GT3071R (at least on our hub dynos) start falling over just above 300kw where the GT3076Rs can start pushing higher than that. You probably need cams to really utilise the higher flow of the 76mm compressor wheel though. I know people have got well into the 350wkw area on hub dynos with them on pump gas, or over 370kw on race gas with the right setup.

Haha I have a fair idea of what a setup like yours drives like, and I recommend semi slicks being a permanent fixture to the back of the car

Most cars are around 1400kg these days, all the EVOs etc have porked up to that kind of weight. There isn't much you can get modern which is much under 1300kg. And in terms of fuel, you just described the state in NZ - 98oct is $2.04 a litre at the moment

Very nice video Was interesting to observe, I can't tell watching it if my turbo (.82a/r GT3076R) is any laggier - nothing obvious thats for sure . Something else which is interesting is your car is definitely a bit quicker than mine, I have made very similar power number but on a hub dyno so all it does is confirms what every already knows - hub dynos read a bit higher haha. When I sort a couple of things out I am tempted to try a 17-18psi tune and have a blat at the local race track (I actually have one 15mins drive from my house!! ) and see what mine does the rolling to 200k thing like. Should be good for some rapid 1/4 mile times like that, especially with some sticky tires.

Read it off the core - ie, not the housing but the bit between the exhaust and compressor housing - looks like this: Most Garretts have a tag with a serial number on it

Well I can't imagine what an RB26 with a GT30R would be like if thats true (which I doubt)!!! My car seriously makes GTRs feel lazy down low, and nothing too special up high. A stock turbo R32/R33 GTR feels like they have nothing on mine anywhere in the rev range, in my opinion. Again weight comes into it, but the thing even at part throttle starts pushing nicely from 3000rpm - if you still have much throttle by 3500rpm then you're probably breaking a law if you are on a public road.

I'm going to really have to go in a car with GT-SS, from what you're saying they spool better than the stock twins?!

I am glad you said that - I have said similar before and been flamed for it. A mate of mine is making in the high 300kw @ wheels area with his R32 GTR running a .82a/r GT3582R and it feels better on the road than another mates GTR running twin GT2530s. The GT3582R car and the GT2530 are running the same boost, the GT3582R is faster down the 1/4 (trap speed and ET) and doesn't need to be basically bounced off a limiter/launch control to launch without bogging. It feels to me like a better setup, and its far tidier, easier and more impressive to look at haha.

Yeah I understand what you mean, and without proof I (or neither of us) can really debate it. I can tell you that my car (RB25 + GT30R) monsters any GTR I have driven for spool etc. I can't promise how much it is to do with vehicle weight however. I've never driven a GTR with GT-SS however, but they wouldn't make any more power than a GT30 would they?

There is only one GT3040R in that thread which I have seen, and it was making ~300kw @ wheels with stock fuel system - the guy never came back (that I am aware of) with a result using the 555cc injectors he promised. Do you know of any others? I know people making well over 300rwkw with GT3076Rs on RB25s, so presumably people would make even more on GT3082Rs.

I think that'd probably be the way I'd go, especially if you have it in a RWD - I think lack of power isn't going to be your biggest problem For interests sake, if I read it correctly the 1.06a/r GT30 turbine actually flows better than a .82a/r GT35 turbine, and if that is correct and I am not missing something else (which is entirely possible) then using the 1.06a/r you will actually be able to make more power at higher boost than the typical .82a/r GT3582R. Given that the GT design is fairly well suited to bigger a/r housings, and that there is less rotating mass, it makes me wonder if you could end up with a combination almost capable of making similar power AND better response to with a GT35R. I hope Discopotato03 finds this, and enlightens... or shares an opinion

Well my personal opinion/what I would do in your position would be run with the .82a/r with the stock cams and pour a bunch of boost into it make the most of it being a punchy set up. Regardless of how much power it makes, it will be quite punchy though you probably won't have the full top end monster you could have. I reckon it could be quite a fun car though If I remember rightly the .82a/r GT30 turbine side has very similar exhaust flow to a .63 GT35R, and runs exactly the same compressor housing and wheel - so I can't see why it'd not do anything a .63a/r GT3582R would do, maybe SLIGHTLY less flow and better response. Its when you start getting into .82a/r and 1.06a/r GT3582Rs where you will start losing out in my opinion, I'm no expert though haha. If you intend on later on down the track upgrading cams etc, then you'll have a good idea of if the GT30 turbo is going to be sufficient - going GT2860s or GT2530s would probably be a waste when you already have the turbo and don't have the cams to really justify the extra flow up top. Again, only my opinion.

Hiya, sounds like quite a neat build - though I'm not sure why you'd go to so much effort and stick with the stock cams, I'm not entirely sure if or how much that may conspire against you in going for your power goal. Which turbine housing are you running on it, the .82 or the 1.06?? Also I'm not sure what dyno you will be running on, some of the aggressively low reading dynos over there you may struggle to get that out of a GT3082R though 340kw SHOULD be achieveable on most I'd imagine though no matter what you will be pushing the higher end of what a GT3082R can do. I know someone over here (NZ) running one on his RB25DET R32 GTSt and on slicks he has run 10.1 with a small shot of NOS.

Precision SC61 or Garrett GT3582R is fine for mid tens - they are much of a muchness power wise but the Garrett spools better. One of my mates did 10.6 on MickyT drag radials with a full weight R33 GTS25t using Jun ~260deg cams on an RB25, 272deg are pretty overkill in my opinion. You should be able to make do with 260deg Tomei Cams, and not revving over 8000rpm - another mate of mine was running 500whp with a .82a/r GT3582R on 1.4bar with those cams on an RB26, trapped over 120mph with a full weight R32 GTR on his first outing. With a S13, pure rwd, much less weight and exactly the same setup with decent suspension and tires you should be well into the tens and >130mph.

Have a look at their website www.htlracing.co.nz and get in touch with them there, or at least have a look there. The car will be racing again at Jamboree in Oz this year.

Looks laggier than mine :|

I thought dredging up this old thread would be the best way out pointing this "new" turbo out to see if the masses (ie, DiscoPotato...) have any say on this new thing ForcedPerformance have started playing with - their new "HTA" design turbos. Of most relevance to this thread, the GT3076HTA which claims to both spool better and pump more air than the old 56Trim GT3076R - it seems to use a 7blade 52trim 76mm wheel of some sort, which I thought is the bad juju? Its an interesting looking inducer though. Thoughts? http://store.forcedperformance.net/merchan...y_Code=Turbo-FP

Very nice pics, and bummer to see it went wrong first time - gotta gut you. I was sure I've heard that unless you're going mental with it, theres no point doing any more than maybe a basic tidy up of the ports - no reprofiling or anything as they're so good stock. I know not everything you hear is true, but sure that I've heard that its not uncommon for RH9 cars to not have had any work done to the ports on the cars - just big cams and whatever is needed to fit them and actuate the valves correctly.

Gah wtf I'm sure I wrote more in that post. What I must have deleted was that while its a good idea, and many forums have done so - I suspect if someone isn't going to search the forum or use Google to find the information, how much of a pain in the arse would it be if people (I'd be willing to help if a team effort was going to be put together to write stuff up) never actually used the data compiled?

I suspect I'm still under that post count I got this for $350 - does anyone know if this turbo will make a decent upgrade to my old VG30 turbo (housing pictured on the left)? Will I get full boost by 3000rpm? Chur: (j/k)

Goddamn - congratulations!!! Awesome to hear someone getting really close to the 7s. Be neat if it gets there soon, when Heat Treatments get over there it could be a particularly epic show - may be the first time the world has seen side by side 7s from GTRs

Nevermind, I just discovered this deserved two threads.

Nice numbers! What is the car/engine?