Quote:
Originally Posted by Bob Cosby
Please, go look up SAE Certified. The Ford GT was not - the GT500 is. As for Dyno's....holy cow....dude, they are a tuning tool, and when used for their primary purpose (tuning), the Mustang dyno is actually more useful than inertia dynos.
Finally....accurately calculating BHP off of RWHP is simply not possible. Way too many variables.
|
From what I have read the document for certification is very long and vey complex.
And you are wrong about your comments about chassis dynos from every point.
1.) It is a Mustang Dyno that is the most inaccurate because the operator has to enter in variables such as weight of the car. Then you have an eddy flow current motor trying to match an engine accelerating plus loss of power from inertia. Sorry, the numbers I see posted form Mustang dynos are pure BS, all over the map and some even bordering The Twight Light Zone.
2.) So, if an engineer is designing a machine to process a product and he has a requirement for X-amount of HP. He specs out a combustion engine or an electric motor and fits it to a gear box then he does not know what HP and torque is coming out of the gear box? Give me a break. The chassis dyno can be looked at as a machine processing a product.
3.) An inertia dyno has the Laws of Physics on it's side. Not some logical controller programmed by some dumbass simply trying to get a set of numers he thinks is accurate.
4.) This is from the Kenne Bell Tech forum on SVTPerformance written by Kenne Bell themselves. This test is an "Engine Dyno versus a Dynojet". All numbers remarkebly close to 15%.
http://www.svtperformance.com/forums...rip-tests.html
5.) An owner on SVTPerformance just posted the numbers for his 2013 at 614 rwhp SAE. Do you honestly believe that car only lost 48 HP thru the drive train? That is a 7% loss. Dang, Ford sure is good at building an efficient drive train and overcoming the Laws of Physics. Maybe it's that carbon fiber drive shaft. Yeah, that shaved 8% off the drive train loss. That means that DS would have to have removed about 50% of the weight from the drive train. Um, no.
6.) Drag testing will prove I am right.
7.) After owning a 2003 Cobra and laying claim to the first private dyno sheet posted on the net from a PRIVATE owner and putting up with all the liar allegations and that I swapped the pulley because I removed the pulley cover, well, I think the 2003 Cobra's reputation far exceeds all the DENIALS.