Lithium

I can't believe that I am inclined to agree with you. I have been daily driving with 270+wkw since the end of 2006 though - I gotta admit it kept me a little amused for a while haha

I am working on it

Don Dada - btw, slightly OT threw the Skyline for a power run at a local car event just to test the cars behaviour and determine if its ready for tuning. The internal gate is still a little lazy compared to an external but far better than before, hits 1bar by 3600ishrpm then eases off its aggression in spool (wastegate easing open) to hit 17psi by just over 4000rpm - where it holds flat enough to redline that it could have been done with a pencil and a ruler. Power figure inconsequential at this point, fat as hell fuelling at that boost level as its not been tuned to do anything other than not pop - hopefully will be sorted very shortly now I know its all good to go... then I might be able to add a revised IG GT30R result

Shame there isn't a dyno plot of the GT3076R showing its full strength in there - you see the slight compromise in low down over the GT2835, and not the top end roar. Fwiw, GT3037 and GT3076R are exactly the same - so really you could just stipulate "GT3037/GT3076R - .xxa/r" as the a/r bit is going to be the only thing which changes the spool and top end flow.

Awesome - really have to look into getting over for Winternats if I can. Side by side mid 7s GTRs would blow my mind

The spool difference is interesting given the 6765 supposedly spools better than a GT40R 900whp... dyno plots and specs please. Otherwise, I don't know why you'd bother - my off the shelf GT30R does 700whp and gets full boost at 3200rpm. Honestly.

Here's an overlap of a PT6765 and a GT4088R: Not too surprisingly the GT4088R spools better (carrying ~20whp more up to 6000rpm) and the 67mm has a bit more flow - being the bigger compressor. The dyno plot looks a bit like the 67mm is running a bit more boost up high, but there are bound to be all sorts of additional things to the picture, shame there is no boost plot. Edit: A mate of mine has an R33 GTS25t with a built RB25 which is going to be running with a PT6765 pretty soon, I don't really expect to see it make full boost before 5000rpm... if it does then they really are a good have your cake and eat it too solution. It will be tuned with Biofuel I believe, so shouldn't mess around

I don't know about the spool better and make more power thing, they definitely do really good for a particular size but whenever I've seen evidence of say a PT6262 billet turbo - it seems substantially laggier than a GT35R equivalent. In the PT's defence, they seem to make a metric shit tonne of power for "inducer size" but it feels more like comparing a rotary to a piston engine. Sure its technically smaller, and makes more power than the same size equivalent - but it also has the downsides to having a bigger turbo. At least from what I've seen. I've also seen people grumbling about reliability with the new Billet turbos, though it may just be that people are trying to push the limits with them - most people don't both trying to run 40+psi through a GT3582R. Nonetheless, AWDMotorsport's EVO9 always impressed the hell out of me by doing that 8.9 in a full interior car running a PT6262, even though the rumour mill indicates the thing was a grenade. ForcedPerformance HTA-series turbos seem a bit more attractive in terms of spool versus power, the Precision ones seem better for drag racing where there are "inducer limitations" in classes... so you don't need the response but you want as much power for the compressor size - and if I were worried about bang for buck - Borg Warners seem to lead the charge imho.

I reckon broad minded person is a much more accurate term. PS, it was a coil.

OK sweet, I thought so but just wanted to be sure. For what its worth - I know a couple of people who have independantly switched to twin scroll configurations using the same CHRA, just changing the manifolding to suit and have fantastic results. One was from a .82a/r GT3582R to a 1.06TST4 GT3582R on an EVO and it gained a few hundred rpm in spool and made roughly the same peak power. The other was going from a .96a/r single entry T04Z to a 1.00a/r twin scroll housing (on my recommendation and having issues with disappointing spool and power <gloat>) on a built VG30DET. The car also improved spool by around 400rpm, torque for a given boost level went up substantially and as such power did. The car also wanted to take much more timing, so much so that the owner and the tuner decided to change the ECU on the car as the amount more timing it wanted seemed alarming compared to where the car previously became knock limited. They stopped tuning at around 430wkw (from 390wkw at the same boost on the .96a/r housing) and ran it up again with a G4 Link, where they ended up with 460wkw on pump gas - with far better spool and generally way better driveability. The owner of the car did all fabrication himself, so this is not a fancy big dollar twin scroll setup

Very nice - tensions getting up for when the defending champion touches down.... he's done his last meet on NZ soil before heading back over to Oz. HT were running around 7.8 @ 180mph this weekend just passed on Meremere, weather and a split plenum stopped them from getting opportunity for a better run but they had reckoned a 7.6-7.7 would have been doable on a clean run. Should be good when they get it onto a track which can handle the power better again, it'll be some amazing racing!

What specifically are you after? I've seen some pretty convincing results from twin scroll setups and am a total convert, my next turbo setup will definitely be a twin scroll one

They are a slightly mutant version Bullseye put together, I have actually been considering going to a genuine Borg Warner S300SX 83/75 for my next setup....

Awesome awesome car, can't wait to hear how it goes when its all dialled in. What wake up call is this, and why do they deserve it? They have been doing an awesome job of setting near impossibly high bars time attack , definitely not being cocky about it at all as is evidenced by heading to Australia to take part in this event - they are obviously looking for the sport. They are well ahead of the game, though racing away from their home turf will no doubt narrow the gap a bit. Good luck!

Hello! Good to see you on here

Holy shitballs, is that this car?

I've seen 2/3 stock R34s on dynos around here and they all ran near 11psi with just exhaust - I don't recall even seeing any sign of dual boost levels, like the R33s have.... though its been a while. I do remember the ~11psi part (with no boost control) vividly though.

Nytsky, slightly off topic - going from 365wkw with the GT3076R to 390wkw with the GT3582R.... which is your preferred setup?

Completely and utterly disagree - by far the fastest street car I have ever been in was making around 480awkw when I went in it. Not just top speed stuff, just everywhere. RB30DET running 1.8bar with a hearty turbo etc... in an R33 GTR. Nuts, at any speed. I liked

Awesome - congrats, and let us know how you find it to drive etc

Not many words necessary: http://www.htlracing.co.nz/workshop.html

At around 175kph... BTW, V6 twin turbo?

A thing worth knowing about bonnets of cars is they are part of a boundry layer - subject to LOW pressure, you will be breaking up the boundry layer and having a huge negative effect on the car's aerodynamics... which if the car is intended to be fast enough that you are worried about the air flow to this degree (with a GT3040!?!) then aeros are worth considering. There is also the whole fact that the bonnet surface of most cars tends to be a low pressure zone, unless really close to the windscreen - its going to want to suck air away from the turbo unless turbo the turbo is FULLY outside the bonnet. That'd look pretty gay, and do shit things to aerodynamics. If its that full on a drag car, remove the headlight and duct air straight to the turbo, also if you haven't already bought a turbo - get a Borg Warner S300SX series turbo.... you seem worried about the staunch look of the turbo (even if you don't admit it) and they look sound and flow awesomely, not the best spool (not the worst either) but they are pretty cheap if you are willing to go to the effort of getting one. RE: The intercooler question, are you serious? Have you almost built this? This is a drag car right? Cooling/more power is well worth more than response in a drag car. Cold air induction is not going to negate the need for an intercooler, as the act of compressing air is where most of the heat you need an intercooler for comes from.

Yay! Good luck

Do I have to set you on the right track with everything?