Lithium

Madness, nice work.... whats the spec as raced? Any vid?

Plenty have made 500whp on normal GT3582Rs, a PT6262 is a bigger turbo again. When E85 has been involved, the 6262s have gone well north of 600whp...

Its all day after tomorrow like now, I figure you should at least share some details after this much waiting

Yes. Jason - I've never seen a yank estimating flywheel power.

Orrr... you could get your Garrett upgraded to a 68HTA wheel

It depends on how good your engine is, how heavy your car is, how much boost you are using, what fuel you are using etc etc.... I know of people running anywhere from 9s to 11s with those turbos. The standard response is, go and do it - what someone else has done bares little relevance to yourself. In short, as fast as 9s are possible - odds are you won't hit them unless you have a car hell bent on going fast with good tyres fuel and are a well experienced driver.

14.1 @ 98mph, depending on boost.

Totally, no idea why people still aren't totally convinced when a lot of people (including Nissan) obviously swear by it. Proof has been posted and lots of credible people have stated time and again that its well worthwhile, it should be as clearly defined as is the fact that a turbo helps our cars make more power and torque. <edit: Sorry, missed you had already responded - but still, VCT fully makes a worthwhile difference, I've seen ~10% gains for reasonable portions of the rev range by tuning it properly... and a couple hundred rpm or so improvement in spool> And yes, how did it go Jez?

119mph isn't a bad trap speed though, to be fair... though in saying that when you are limited by small injectors you can still make a car quite a bit faster than many would expect doing sneaky wee tricks. At lower rpm you have a longer pulse period, so you can actually move more fuel with an equivalent duty cycle. As an example - I've tuned a Silvia running a G4 Link & boost control but still on stock injectors was quite held back, hitting 85% at 7000rpm at the boost level we were setting it up for. That boost level just wasn't going to do the setup justice, so I set up a "tapering" boost curve which resulted in a boost level some 6-7psi higher at 4500rpm than at redline and progessively dropping down... but injector duty cycles still never went over 85%. The resulting change in how the car performs is VERY substantial, torque wins races and hp sells cars?

Hmmm if you are finding that the fuel flow into the engine is levelling off at 85% IDC I'd consider looking at whats supplying fuel to the injectors more than the injectors themselves, personally - what pump is that with?

I agree, its the one I was most looking forward to - however I think the stock manifold(s?) could turn out to be a problem in this particular instance. Yep

Awesome, look forward to hearing final results - hopefully better luck this time

This weekend just past the RIPS front-engined dragster ran a 7.19 @ 180mph, then followed it up with a 7.14 @ 181mph!!!! Absolutely awesome stuff, would have loved to have been there to see it myself - but still very cool and I look forward to seeing footage (oh please let there be footage). Congrats Rob and team, well deserved - you must all be over the moon. See this thread on GTR UK for banter and more details: http://www.gtr.co.uk/forum/162514-rips-fed-6-990-192-74mph.html -------------- HOT OFF THE PRESS - RIPS just ran 6.99 @ 192.74mph Which makes it the quickest and fastest time run by RB power ever, as well as the first 6 second run done by an RB... congrats RIPS!!

Is there SAE J1349 a separate setting to SAE? I always have used SAE... and "inflates power" is surely a relative term, regardless. So long as all details are considered it is what it is, I'd call it more "inflated" where people reduce smoothing in the hope spikes will boost the #s.

How is reading DD like dynos "properly" calibrated?

Awesome, very much looking forward to hearing an analysis of the differences

Bugger, that sucks! What is the rest of the setup on the car again? Is it a stock mount turbo etc? Jason, not bad result still - would have been nice to see how it went with VCT etc though. How does it compare with the old car?

Awesome, looking forward to updates on both cars

Not the way Rockabilly has done it, he has a twin scroll manifold and twin scroll turbo - the flapper in his turbine housing diverts the gases from one scroll into the other by way of some material removed from the housing. When pressure reaches a certain level, the "gate" closes and the divider becomes complete again - so there is never a point either of the groups of 3 cylinders will ever be completely blocked, however one set will have a direct path down the turbine housing and the other set will be forced to make a restrictive detour which I'm not completely confident would be confidence inspiring to tune for.

OK. Fwiw, I'd say 270-280kw is a good target area for .63 - 300kw is well proven with .82

Ask the tuner, fair chance he has tried it

I guess with a decent manifold it would make things easier. There is no reason for more midrange torque on the .63 unless the tuning was off with the .82, have any EGT log comparisons etc to show? Again, I've owned both and drove both for thousands of km and I never missed the .63. Everyone is going to have different views, but its worth the OP knowing that its not clear cut. I never had anyone go in or drive my car that considered it laggy, I actually had a bit of a queue of people keen to buy my turbo when word went around I was going to sell it off due to how nice the combo works as a road etc car.

Technically possible, but imho its a bit rough - a lot of heat etc involved with that tight a housing - most of the results for that combo I have seen have involved ethanol blends or water/meth injection. I started off with a .63a/r external wastegate GT3076R and swapped it out for a .82a/r internal and never looked back. Well, sortof anyway. The difference in drive wasn't much different aside from below 3000rpm, either. If I were doing the whole thing again I'd use an FP GT3076R HTA with external gate and 6boost style manifold

No no no, don't go the .63 - especially for that power level. Are you going with an aftermarket exhaust manifold as well?

Woot, your GT30 is quite the broad minded person