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10-03-2012, 03:05 PM
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#1
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Internet Tough Guy
Join Date: Jun 2008
Posts: 1,545
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Dyno variances
What do you guys think:
Vette doctors performance built my 416 and tuned it to 530 rwhp. The car runs great. I thought it would have run a little faster than the 122-125 trap speed that it ran at AAA.
I installed a FAST 103 and 102MM TB. We are almost done with the tuning and are around the 450 rwhp range.
The VD dyno was a land and sea dyno. The JBA dyno is a load bearing dyno. Do you guys think that there is enough difference in dynos for the huge difference in power.
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2007 C6 z51 416ci, KW variant III, Wilwood WS6, Traqmate.
2005 F-350 PSD 4x4 DRW Lariat
2013 Mustang GT Grabber Blue, track pack, Brembo, Recaro, 3.73s
2009 Jetta Auto 2.5 liter
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10-03-2012, 03:23 PM
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#2
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pain's fun, hit me again
Join Date: Sep 2009
Posts: 6,264
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If its a loaded dyno then very much so. One is probably a mustang dyno and the other is a dynojet.
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10-03-2012, 05:53 PM
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#3
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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That seems like too much to me. In my case I ran 380 and 391 on a mustang and dynojet respectively. The car was setup almost identically AIR.
Weren't you at 465 with your previous setup and running 122 traps? If so, that's a fair indicator this engine may simply not be making anywhere near 530 RWHP, which I would think in a Vette would put you closer to 130.
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10-03-2012, 06:47 PM
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#4
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Internet Tough Guy
Join Date: Jun 2008
Posts: 1,545
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The first H/C/I ls2 made 490 and would run 118-120. The ls3 stroker made 530 and would trap 120-123, almost 124. I thought it had more in it because it didn't feel like it pulled up top like the ls2. That's why I got the FAST and the TB. The only way to find out is to take it to the track.
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2007 C6 z51 416ci, KW variant III, Wilwood WS6, Traqmate.
2005 F-350 PSD 4x4 DRW Lariat
2013 Mustang GT Grabber Blue, track pack, Brembo, Recaro, 3.73s
2009 Jetta Auto 2.5 liter
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10-03-2012, 06:51 PM
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#5
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Internet Tough Guy
Join Date: Jun 2008
Posts: 1,545
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The first H/C/I ls2 made 490 and would run 118-120. The ls3 stroker made 530 and would trap 120-123, almost 124. I thought it had more in it because it didn't feel like it pulled up top like the ls2. That's why I got the FAST and the TB. The only way to find out is to take it to the track. I made more power after they were done then when I drove it in. I will go drag racing soon and see what she traps.
Regardless, I will have to put the car on a dynojet dyno for NASA.
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2007 C6 z51 416ci, KW variant III, Wilwood WS6, Traqmate.
2005 F-350 PSD 4x4 DRW Lariat
2013 Mustang GT Grabber Blue, track pack, Brembo, Recaro, 3.73s
2009 Jetta Auto 2.5 liter
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10-03-2012, 07:20 PM
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#6
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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When's that gonna be? The 14th.
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10-03-2012, 07:40 PM
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#7
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Senior Member
Join Date: Apr 2008
Posts: 1,557
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Hot Rod mag did a dyno compare a few years ago. Same car taken to 4 shops without changes to the set up
And the whole article....
http://www.hotrod.com/techfaq/hrdp_0...e/viewall.html
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10-03-2012, 08:40 PM
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#8
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Internet Tough Guy
Join Date: Jun 2008
Posts: 1,545
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Not the 14th. Speedventures has a points systems that determines the class. I have enough point to force me into the unlimited class.
NASA is strictly a pounds per horsepower system (when you have a major engine mod). It will be in Jan or Feb.
__________________
2007 C6 z51 416ci, KW variant III, Wilwood WS6, Traqmate.
2005 F-350 PSD 4x4 DRW Lariat
2013 Mustang GT Grabber Blue, track pack, Brembo, Recaro, 3.73s
2009 Jetta Auto 2.5 liter
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10-03-2012, 08:49 PM
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#9
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by kdracer73
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That's what I thought. The spread is not *that* big. 530 vs. 450 is pretty major. Maybe a combo of difference between Mustand and Dynojet and shit hot day vs. a nice cool day? Even that seems a little much.
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10-03-2012, 08:56 PM
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#10
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Senior Member
Join Date: Feb 2010
Posts: 325
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How did they determine RWHP with just the motor?
Is that called a scientific guestimation, like global warming?
There are a myriad of variables between the flywheel and the where the rubber meets the road and every car is different.
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