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  #21  
Old 07-07-2010, 03:55 PM
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Originally Posted by JCL View Post
What is really funny is that the numbers he shows aren't 30% in any case. He calculated 30% of the wheel hp, instead of 30% of the presumed flywheel hp. His number of 167 hp losses in the drivetrain is actually 23% of the measured wheel hp. Even that number is questionable, as it means that 167 hp = 125 kw are being radiated out of the transmission and differentials as heat.

If the standard vehicle makes 550 flywheel hp, and actually had 23% driveline losses, that means that 126 hp is being dissipated as heat. Why would modifying the engine result in 41 more hp being lost in the driveline? It is the same driveline as before the modifications. Any discussion of driveline losses as a percent is on a shaky foundation to start.

I don't know what is worse; this tuner not knowing any of that; or making an error in the calculation if we give him a pass on his illogical approach; or him knowing it is all bogus and trying to use it to sell his tune.

Wonder if it comes with a dash plaque saying 724 hp?
holy wow... i totally skipped the 30% of the wheel hp part. That's kind of funny.

Take this for what it's worth... (and let me preface this with the comment that the only similarities in my example are the AWD/Auto)... Dinan quotes the S/C 4.6L motor at 451 brake, and I saw 325 wheel.
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  #22  
Old 07-23-2010, 02:07 PM
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Yeah.....30% is WAY too high. If that is the case then my car has 728 crank....I put down 510 AWHP on my mustang dyno.....i htink the only issue right now is that no one has standardized the [email protected] number....im still thinking that it is 10-15% drive train loss and 20% at the max.
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  #23  
Old 07-29-2010, 03:50 AM
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I did an upgrade for my chip & exhaust and they claim 630-650 HP, so i did my dyno test and it came around 511whp

but lets be honest the difference is huge you can feel more power and more acceleration it real worth the money i spend.
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  #24  
Old 07-29-2010, 10:08 AM
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Originally Posted by x6m_monster View Post
I did an upgrade for my chip & exhaust and they claim 630-650 HP, so i did my dyno test and it came around 511whp

but lets be honest the difference is huge you can feel more power and more acceleration it real worth the money i spend.

What chip and exhaust? Spoke with ESS and they are getting about 610-620 without exhaust. But they are still doing more testing.

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  #25  
Old 08-01-2010, 01:41 AM
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I did it with PP performance, i think most chip (ECU) upgrade have same output.
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