EVO VIII Dyno Result!
Jan 22, 2003, 09:29 AM
#16
What dyno was this tested on? It seems way too optimistic for the WRX, which makes me wonder about the Evo results. If you were to assume the WRX had 227hp then that would equate to about a 16% drivetrain loss based on those dyno numbers. Using that same number for the Evo would give you about 273hp to the crank.
Mark
Mark
Jan 22, 2003, 09:38 AM
#17
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Originally posted by Turboniam
If the EVO dynoed at 230 to the wheels and it is rated at the crank as having 271, the drivetrain loss would be 14.76%.
I thought AWD had more drivetrain loss than that??? I thought they were like high teens or low twenties for drivetrain loss??
If the EVO dynoed at 230 to the wheels and it is rated at the crank as having 271, the drivetrain loss would be 14.76%.
I thought AWD had more drivetrain loss than that??? I thought they were like high teens or low twenties for drivetrain loss??
Fedja
Jan 22, 2003, 09:43 AM
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Actually, MrAWD when I do the calculation on percentage loss for that it's ~15.13% ... not the 18% you said it was pointing to.. the 14.76 is a wrong calculation for 230/271.
Jan 22, 2003, 10:00 AM
#21
Doesn't look right. You have to take the percentage loss form 271hp. Sort of guessing game till you match the 230hp.
Your taking 18% wheel hp loss or does that translate to 24% flywheel hp loss? Which ever you do depends on what your drivetrain percentage applies.
Your taking 18% wheel hp loss or does that translate to 24% flywheel hp loss? Which ever you do depends on what your drivetrain percentage applies.
Last edited by gtr; Jan 22, 2003 at 10:04 AM.
Jan 22, 2003, 10:06 AM
#24
Originally posted by theaphextwin84
(271-230)/(271) = .1513
calculating loss from flywheel hp to wheel hp
(271-230)/(271) = .1513
calculating loss from flywheel hp to wheel hp
Problem is we are uncertain on two variable. Friction and Flywheel hp. Actually we can calculate the friction like the aphextwin84 has done but is it really 271hp? And Why is that dyno # so high. I think they messed up like what SCC has omitted on correction factors on the dyno. I recalled SCC had high numbers at one point also.
Last edited by gtr; Jan 22, 2003 at 10:10 AM.
Jan 22, 2003, 10:08 AM
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both ours are right KK, which give hope that if it really did dyno at 230 and the drivetrain loss % is similar to previous which has been said earlier around 18% (not sure on this) it should be about 280.5hp
although I will say that it does make perfect sense that if the dyno is too optimistic then ~222 sounds like a good number that it could be up from which probably makes the most sense. So basically you can assume that 222 is probably what it should dyno to and we are probably truthfully getting ~271 at the flywheel... yay US regulations
although I will say that it does make perfect sense that if the dyno is too optimistic then ~222 sounds like a good number that it could be up from which probably makes the most sense. So basically you can assume that 222 is probably what it should dyno to and we are probably truthfully getting ~271 at the flywheel... yay US regulations
Last edited by theaphextwin84; Jan 22, 2003 at 10:10 AM.
Jan 22, 2003, 11:05 AM
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remember, MMC has a tendency to underrate HP, so I have no problem believing 230 whp in the Evo8. I have seen dyno sheets on the WRX from 165 to 175 hp, depending on temp, elevation, gas etc. (and there are a TON of WRXs in Minneapolis - like hundreds)
Jan 22, 2003, 11:43 AM
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Originally posted by WestSideBilly
What kind of dyno and under what conditions was this tested? DynoJets tend to yield higher results than Mustangs, etc. And weather, even though it is "corrected" out, can affect the result, especially on a T/C car with intercoolers.
What kind of dyno and under what conditions was this tested? DynoJets tend to yield higher results than Mustangs, etc. And weather, even though it is "corrected" out, can affect the result, especially on a T/C car with intercoolers.
Jan 22, 2003, 02:03 PM
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Originally posted by ru4real
Ben, you've hit on a new theory that now proves everyone else wrong!
Drivetrains don't have a set horsepower loss or resistance. While you may have found an example that works, it's just a coincidence, and you can't always rely on a manufacturer's claimed flywheel horsepower numbers. Drivetrains lose a percentage of the flywheel horsepower, because they perform according to the power transmission efficiencies of the gears.
Ben, you've hit on a new theory that now proves everyone else wrong!
Drivetrains don't have a set horsepower loss or resistance. While you may have found an example that works, it's just a coincidence, and you can't always rely on a manufacturer's claimed flywheel horsepower numbers. Drivetrains lose a percentage of the flywheel horsepower, because they perform according to the power transmission efficiencies of the gears.
http://www.vishnutuning.com/dyno_myth.htm
Last edited by Ben; Jan 22, 2003 at 02:07 PM.