Originally Posted by RCZ Sorry to respectfully disagree. So...GTM advertised 460whp at 8psi on 93 OCT w/ 2.5" exhaust and 420whp @ 8psi with stock exhaust in their press release
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02-28-2011, 06:00 PM | #31 (permalink) | |
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Boost is back pressure. The stock exhaust is as restrictive as it gets. When you relieve back pressure in a force inducted application, you have a PSI drop off but you pick up torque and power. Now it seems like this SC is capped @ 8 PSI. What that tells me is that no matter what you do to it, it cannot move enough volume to move more air than 8 PSI. Put the larger stage II or III head unit on it create more volume and turn the boost up, period! The garbage idea of leaving a stock exhaust on a force inducted car is one of the most outrageous things that I have ever heard...
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02-28-2011, 06:03 PM | #32 (permalink) |
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I hope this doesn't turn into another flame thread
TBH i really do like that torque curve. Plenty of power throughout the band, I'd love to have that for Rin. |
02-28-2011, 06:07 PM | #33 (permalink) | |
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02-28-2011, 06:14 PM | #34 (permalink) | |
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Are you talking about a vortech kit if so they dont make a kit for a 350z HR the do make it for the DE 350z If its 8 psi thats the normal numbers for a DE. The one thing I notice about all the GTM supercharger dyno's is that flat spot up top most of the times a centrifugal supercharger will keep building boost all the way to redline. Last edited by Mr.Squeeze; 02-28-2011 at 06:17 PM. |
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02-28-2011, 06:44 PM | #35 (permalink) | |
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Now as far as making 460 at the wheels, c'mon thats bogus. The Stillen/Vortech head unit moves much more volume and to the best of my knowledge they haven't even seen those kind of numbers, (YET)! If you want to make 450+ you are going to need to turbo the car, plain and simple!
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02-28-2011, 06:50 PM | #36 (permalink) | |
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02-28-2011, 06:56 PM | #37 (permalink) | |
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Tony
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02-28-2011, 06:58 PM | #38 (permalink) |
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460whp is what intro level TT's are running, are we to believe that the stage 1 SC and TT make the same power? Still I'm with RCZ on this one, GTM led us to believe more, clearly the stage 1 compressor is not enough.
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02-28-2011, 07:01 PM | #39 (permalink) |
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BTW I'm a huge fan of Tony's long tube headers. Every SC setup I've ever seen, headers and exhaust setups at 2.5" have increased power not robbed.
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02-28-2011, 07:37 PM | #40 (permalink) |
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Shumby made 390 rwhp at 6 lbs with stock exhaust manifolds and stock cat's. Not sure what exhaust he had.
Headers and high flow cats will cost you boost and RHWP.
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02-28-2011, 07:44 PM | #42 (permalink) |
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If GTM made 460 rwhp then just think what my stage 2 will make.
I will be happy if it makes 450 rwhp. (if it ever gets to me ). It looks like the average GTM makes around 400 rwhp and that not SAE measured. The real # would be around 388 to 390 SAE. Z
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02-28-2011, 07:57 PM | #43 (permalink) | |
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So far, we have many customers that have installed the system and they are on target for the average horsepower we anticipated. At no point did we ever say that our kit is going to make 460whp. Take the same exact supercharger and install it on an engine that doesn't have crazy overlap (read VQ35HR), and the kit is capable of making 487whp without any special intakes and on stock cats and HKS cat-back exhaust. That's with full control over cam timing (intake and exhaust). |
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02-28-2011, 08:24 PM | #44 (permalink) | |
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02-28-2011, 08:34 PM | #45 (permalink) |
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I think the inability to tune VVEL has always been the limiting factor, once they crack it everyone using F.I. is going to see massive gains.
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