Chuck, isnt the 67mm near choke flow at our altitude? If you think it can go higher then no complaints here! Engineer mike claimed something like only 60lb/min flow potencial at our elevation even though its 75lb/min at sea level.
As intelligent as Mike is (and don't get me wrong, I wouldn't even dream of challenging him to a physics competition), I think sometimes he may read into things a little too much. There is always some variable that may not be taken into account.
With 32 PSI, I'm only using 80 - 82% duty cycle from the boost controller. I would have gone higher on the boost, but I'm already scared enough as it is to continue running it at 32 PSI. I'm certain that I haven't run the turbo out of steam yet, as you can see by the dyno graph, the drop off in power is minimal, at the very worst!
If I were dropping power significantly before redline, I would agree that I was at the limits of the turbo. But being that it is maintaining a steady curve that minimally drops off right at the redline, I'd have to say the turbo has at least another 50 HP in it!
Going from 28 PSI to 32 PSI yielded a 80 HP gain over my last dyno session. That's a gain of 20 HP per PSI. Granted, some of the power could be attributed to the E85. But I have a hard time believing that pushing the turbo another 4 PSI couldn't at least yield another 50 HP or so. That would be a return of 12.5 HP per PSI.
All this is only speculation, and only time will tell. But when it comes right down to it, I'd have to say this setup works VERY well and efficiently, and will be even better when I can extend my redline into the 8k territory. If I'm not satisfied with the turbo alone, there is always the option to top it off with some spray! And if that doesn't do it, it's on to a T4 footprint!
I am guessing mine would top out earlier. Huge H cover on the compressor but I have a 4 bolt .63 instead of your 5 bolt .82. (its a 5 bolt right?).
I love the p trim wheel. Superrunner is running a new wheel that supposedly spools like the P trim but flows a lot more....a "GTX" wheel or something like that. Maybe the t3 housing is the plug in the system though Not that its a plug right now though. I always get pissed because the 67mm map is not public. I don't understand the reason.
I have the same desire to add 1000 rpms onto my revs in order to widen the powerband.
Your 2-3 shift sucks doesn't it? Maybe if this setup will let you powershift......
I am guessing mine would top out earlier. Huge H cover on the compressor but I have a 4 bolt .63 instead of your 5 bolt .82. (its a 5 bolt right?).
I love the p trim wheel. Superrunner is running a new wheel that supposedly spools like the P trim but flows a lot more....a "GTX" wheel or something like that. Maybe the t3 housing is the plug in the system though Not that its a plug right now though. I always get pissed because the 67mm map is not public. I don't understand the reason.
I have the same desire to add 1000 rpms onto my revs in order to widen the powerband.
Your 2-3 shift sucks doesn't it? Maybe if this setup will let you powershift......
It's actually a 5-bolt .63 Precision housing (which AMS claims flows just as well as a .82 garrett).
As for my 2-3 shift, yeah...it sucks! 3rd gear is a P.O.S. in these trannys! That will all be fixed soon enough, though. I have a fully billet shift fork, a new 3/4 syncro, a twin disc, a billet input shaft with a longer 1st gear ratio, and a few other goodies. It should, for the most part, alleviate the issues with shifting. If not, DEATH will become the car!
if you decide to do that let me know first so I can get that drivetrain and turbo setup...
I don't think I could allow it! If the twin disc and billet fork don't solve the shifting issues, I could only conclude the car is CURSED! And we can't be passing on curses like those! They must be destroyed! Eradicated from the face of the earth!
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Not that its a plug right now though. I always get pissed because the 67mm map is not public. I don't understand the reason.
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