Lithium

Yes it does. Depending on the track and dyno, I've got an pretty damn good "hit rate" on predicting ETs and trap speeds here. You guys just have weird reading dynos

Are you going to use the NOS shot with the new setup?? Again, I suspect this is going to be a damn fast car soon.

I have no idea how you guys get those kinds of times, but they sound extremely unrealistic most places. I reckon a high 13 at ~103mph with 190-195rwkw and maybe a low 13 with MickyT drag radials would be a decent target with a decent driver etc in any tracks/dynos I have come to know. 1.81 60ft on shitty road tires just messes with my head - I have no idea what you did there. Are you running 90:10s etc?

However as mentioned earlier, I personally have an internal wastegate - the reason I had not bothered with any other kind of boost control is that I thought the gate should close enough to do its job. Apparently I was well wrong, Cubes runs a similar internal gate setup and gets similar - before it reaches its sprung pressure it creeps open and slows the rate it builds the last few psi quite severly.

I had a Turbosmart bleed valve in there for that run and for my 13.3 @ 112, but am installing an Apexi AVC-R soon. I can set the target manifold pressure for several different RPM zones as well as the "gain". Also can configure adjustment for dealing with spiking or boost dropping, and have gear specific adjustments to "gain" etc to have different effects or correction in different gears. Powerful wee unit, if you are inclined to learn how to use it properly - unlike the majority who just set a target boost level and hope it works it out.

Not sure if you are referring to my example or not - but what I meant by mine is that the wastegate actually cracks open before I reach 1bar. It doesn't fully open, but opens enough to greatly reduce the rate that it builds the last 3 psi or so and makes 4000-6000rpm feel quite hollow after you have felt how the car goes from 6000-7000rpm. I have an internal wastegate however. See boost curve (and this is done on the dyno in 4th gear, where it will build much more optimally than on the strip): I'd love to know, if its not too much of a hijack - if the experienced racers here think I could gain a bit on the strip when I have the AVC-R in there and set up to hold ~1bar flat?

For what its worth my car traps at ~112mph on street tires on ~14-15psi with a GT30R making 270rwkw on a hub dyno, BUT its not running a very nice power curve - internal wastegate slows the spool from 11psi to 14psi quite bad so reaches 11psi by 3400rpm, but then only 14psi by 6000rpm. Have an AVCR to go in, so will have to try again with same peak boost/power but fuller boost/power curve.

Nice read - very cool Probably the best driving impression I've read so far, including car mags.

I *know* you guys aren't morons and have heaps of experience racing, but saying "220rwkw is NOT 106mph" is ridiculous. Saying its wrong IS an assumption, and given he has a dyno plot for it - is a completely irrefutably incorrect assumption. The fact that it doesn't equate with the dyno you use doesn't change the fact it read 220rwkw on the dyno he ran it on which obviously reads different (not wrong) to what yours does. DON'T pay too much attention to the dyno results, you're right in focussing on the trap speed as indication of the cars true power. A dyno result however isn't a completely level measuring stick for a cars true power - so you can't realistically (unless you are well used to the particular dyno) make any kind of educated guess on what trap speed it should or shouldn't do for a given power level .

Not sure why you posted this in NA performance area, its clearly to be compared to RB25DETs... if anyone got as much or more they have done a crapload. I've never heard of an NA RB making that kind of power, VQ and VK series Nissan motors are where its at for that level. I've actually seen a VH41 make >300kw @ wheels naturally aspirated as well, that was pretty cool. Basically sounded like a motorbike....

All looks on track for this Saturday. Apparently they have done initial tuning/testing and going by the numbers etc which have been going around, its probably going to go "rather fast"

Gah apparently they are having teething problems with it so it won't be racing quite so soon

I believe this will happen sooner rather than later

Looking very nice man - how quick are you aiming to go with this???? Going by your nack, I'm not going to be surprised if I hear very near single digit numbers - if not...

Hi All, some of you may know that the Heat Treatments R32 GT-R has been in development in the off season and now is sporting a redeveloped engine/trans/turbo setup with the intention of going quicker. It is now back together and is now tuned and ready to run again with the intention of knocking its world record down a bit lower. Its next meet will be on the 5th of January at Meremere in NZ, given it will be the first meet with the new setup I wouldn't necessarily expect any records straight off - but I'll be there and will post up results if there are any people interested. Here is a link to HT's workshop updates: http://www.htlracing.co.nz/workshop.html

Awesome!! I love this car, and it must be incredibly well set up to do the times you are doing. Be good to see it nose ahead of FUUJIN in the UK as well, as thats one of the quickest actively campaigning GTRs. Either way, well done - and good luck

Errr, any tires you could use on a street aren't likely to hold the power a maxed out GT5591R or bigger would make :S I'd probably stick to putting something like that on a tube framed drag car with huge slicks. Here is a GTR running 4 full slicks black tracking down the dragstrip - running a lowly GT4508R:

Hi Mr twin turbo M3, if the twin GT30R is really yours the I am pretty sure we've communicated albeit under slightly different names. There is only one trim comp/turbine setting for the GT55 and GT60 turbos out there - they have an awesomely wide map and aren't likely to build boost quick enough to surge on a 3.9litre anyway. It'd make sense to go one of the smallest turbine a/rs on a BMW. You mention rev range etc - what boost level/power level are you actually after? GT5591 is a HUGE turbo, I'd not even consider a GT60 and barely think about a GT55. The GT60 you showed, and the only other GT60 I've seen used were both on 26Bs which would provide a shiteload more exhaust gas than a 3.9l BMW though I guess you have to consider compressor efficiency, spinning a 3.9 to near 9000rpm will probably require a decent one though again what are you needs? Are you sure you need to rev that high to meet them?

Sheesh thats honking, well done!!! Its running a T51R aye?

Cool congrats on going with that setup, look forward to seeing how it goes with cams etc. Would you like to post your RB26 GT-SS dyno plot? It would make for some interesting comparison. I overlayed my .82a/r GT30R dyno plot with my stock turbo one and I have overtaken the stock turbo by 3500rpm, so you are effectively saying the RB26 + GTSS will make better power everywhere than an RB25 ever will - perhaps short of putting a smaller than stock turbo on it and converting it into a tow setup.

I'd not be surprised if a Z06 did a high 10/low 11 on drag radials - Edmunds gave a time for the Vette and gave ~125mph trap speed, which is pretty solid. Clearly a quicker car in top end, just without the AWD launch. Nuts results for the GTR, nonethless.

No the V series have already outdone the RB in terms of making outright power, ~2000hp as been made on drag VQ35s. Heat Treatments in NZ *WERE* going to run the motor from the GTR in their 350Z but with research decided that the VQ was a better motor, and they've pushed an RB further than anyone. A stock standard R35 GTR has already hit the dyno and made power which you basically need a cammed, forged, aftermarket twin turbo etc etc RB26 to make which feels gives you a quite laggy car - VR38 looks like its just yawning the power out. Thread: http://www.nagtroc.com/forums/R35-Dyno-t20782.html

Dyno Dynamics dynos DO read silly low though, even compared to most other rolling road dynos. Giants result seems really high for a dynapack though - assuming he is the dude running N1s? Theoretically there isn't a huge amount you can do to make them read real high, you can see the TCF is set to 1.00 which is the main place you can inflate figures.

I am just curious - why do people consider the GT3076R too small for an RB26 but too big for an RB25?

Done 280rwkw on its last run on a hub dyno at 1bar of boost. Not too surprising it sounds just the same, its basically the same as an HKS GT3037 Pro S