wheel horsepower
Hi Glen,
understand your veiws of santapod, this surley must
be aceptable to most people though as the intrest in track days and top speed events and santapod its self is massive on this site
so i thought this reflected the ability of the club members with the type of cars we own be it with a bit of practice me included.
Regarding the benchmark side of things with tjs rolling road it is not a problem if the figures were quoted as road horsepower, and torque (tractive effort) would not be a problem as thats what is actually being measured anyway, so all the mods could be recorded each time they are done and using a weather station for air density and humidity and temperature a correction factor could be applied that will stay true to the last regardless of the day.
This would then only leave the wheel spin and wheel size criteria
to over come,
my point is the figures must be repetable and all information accurate,
looking forward to sunday see you there
Guy,
sorry i was vague i am talking R33s here i dont want to get into a discussion about the difference between 33 and 34 as they are two different comparables due to gear ratio and roller speed as you well know, the figures they show will be different
due to the measurement being taken at a slower roller speed less tyre deformation and loss to friction etc, but again still measurable at the wheels,
to give tractive effort results and if speed was recorded comparisoms could be made,
now regarding the point i am making,
if i use my car as an example i have 11 dyno sheets different times from tj but the drag co varies from 122 to 157.5 in the space of 20 minutes on the same day so where can i draw a conclusion as to what my power is,
with this much variation ?
Gary
GT-ART