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04-04-2011, 02:30 PM
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#1 |
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Re: Percentage diff between a Chassis Dyno and an Engine Dyn
Actually I just went to their website. Don think thats the brand I was thinking of.
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04-04-2011, 03:50 PM
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Re: Percentage diff between a Chassis Dyno and an Engine Dyn
Quote:
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Art Leong 2095 SS |
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04-04-2011, 03:59 PM
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#3 |
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Re: Percentage diff between a Chassis Dyno and an Engine Dyn
As with any dyno, the numbers don't actually matter, it's the DIFFERENCE you see from the changes that matter. The shops I was refering to had Super Flow engine dynos and Dyno Jet chassis dynos. Mustang dynos don't alwaye read lower. Depends on the operator and the load factors they use. When the ATI Procharger people hauled their prototype cars from my shop (Dynojet), after tuning, to their place (Mustang dyno) they typically picked up around 5%.
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Ed Wright 4156 SS/JA |
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04-05-2011, 02:26 PM
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#4 |
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Re: Percentage diff between a Chassis Dyno and an Engine Dyn
Only thing I can tell you is my car lost 28% on chassis dyno.It was automatic then. Dynoed engine on superflow SF900AT It was calibrated as close as possible,air corrected to 29.9 baro 60 degrees. Then later we got a Dyno jet chassis so my car used to test it lost
28%. As Ed said don't compare your # to others,just look at gains from where you started. I don't know about others but dyno jet has setting where you let car coast after pull and it calculates driveline drag or % of loss I can't remember term they use. I don't have much chassis dyno experience but in my opinion they probaly not as repeatable as good engine dyno. Mike Taylor 3601 |
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04-05-2011, 10:06 PM
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#5 |
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Re: Percentage diff between a Chassis Dyno and an Engine Dyn
Mike your sure right. A race converter causes more loss, also converter & fluid temp changes effect slippage losses. Tire slippage is another variable. Had a 10.5 car bring his car two days after it was on Reher & Morrison's engine dyno. His showed a 28% loss also. Mine has never been on an engine dyno. Sure hope mine looses more than 28%! LMAO!
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Ed Wright 4156 SS/JA |
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04-06-2011, 07:19 AM
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#6 |
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Re: Percentage diff between a Chassis Dyno and an Engine Dyn
Ed,
Good morning. Are you saying the HP math on your car is: 0 - 28% = 0 ??? :~)
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Adger Smith (Former SS) |
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04-06-2011, 08:05 AM
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Re: Percentage diff between a Chassis Dyno and an Engine Dyn
Quote:
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Ed Wright 4156 SS/JA |
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