How to convert atw BHP figures
03 January 2005, 03:53 PM
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How to convert atw BHP figures
Hi guys. I've been reading through some RR results on a different site and they are all in atw figures. I'm used to flywheel figures. Can someone tell me a easy quick conversion? Alternativley a standard STi quoted as 280 BHP would give how much BHP at the wheels?
Cheers,Deep.
Cheers,Deep.
03 January 2005, 04:34 PM
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John,was looking at the MLR site where they had results from a RR at G Force. Cars all quoted in atw figures. Some sort of traction figure given aswell? Many Evo6s with Autronics,zorst etc all produced about 270 BHP atw. C'ant you give me an approx of what this would equate to atfw or what a std Sti would make atw at G Force?
Many thanks,Deep.
Many thanks,Deep.
03 January 2005, 04:51 PM
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Almost without apparent explanation my losses have varied from 47 to 104 BHP depending on setup and rollers.
Some insist on quoting figures ATW which has some advantages and disadvantages, namely tyre compound/pressure/wear/size/temperature/deformation, transmission and clutch type/wear/gear used, transmission oil type/temp, dragging brakes/clutch, temp/atmo compensations, double contact patch when comparing with 2WD, RPM at which power is produced, slip, wheelbase amongst others. You are asking a piece of string question where the more you know the less you realise you can know or control, and I'm not being evasive or unnecessarily philosphical. Anyone that quotes a fixed percentage or figure to add has not thought it through IMHO based on the c.220% variance I've seen in losses.
Some insist on quoting figures ATW which has some advantages and disadvantages, namely tyre compound/pressure/wear/size/temperature/deformation, transmission and clutch type/wear/gear used, transmission oil type/temp, dragging brakes/clutch, temp/atmo compensations, double contact patch when comparing with 2WD, RPM at which power is produced, slip, wheelbase amongst others. You are asking a piece of string question where the more you know the less you realise you can know or control, and I'm not being evasive or unnecessarily philosphical. Anyone that quotes a fixed percentage or figure to add has not thought it through IMHO based on the c.220% variance I've seen in losses.
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