New Gear Calculator
Race Director
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Race Director
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From: Fort Worth, Texas
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Race Director
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From: Fort Worth, Texas
Race Director
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From: Southampton NJ
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Race Director
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From: Fort Worth, Texas
Did you try putting in 7% converter slip since you don't lock yours up as the numbers are then spot on not accounting for any tire growth though, which is maybe what Gary is talking about...
Race Director
Joined: Mar 2005
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From: Southampton NJ
no i dont think i have any slippage at that rpm because it couples quickly, im not a converter expert and locking in third wouldnt give me that much more mph or lower the rpm that much, the reason i never used the nitrous at the track dont have a built trans to shift into 4th and that still isnt a good idea if it was
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Race Director
Joined: Dec 2006
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From: Fort Worth, Texas
no i dont think i have any slippage at that rpm because it couples quickly, im not a converter expert and locking in third wouldnt give me that much more mph or lower the rpm that much, the reason i never used the nitrous at the track dont have a built trans to shift into 4th and that still isnt a good idea if it was
That calculation is an indication of yours like I said w/o taking into account of tire growth which shouldn't be more than an inch overall at that speed on a radial with only 4.25" of sidewall IMO, but should remember the last 66' is an average mph for the trap speed so you'll actually going slightly faster when crossing the stripe at the end than what prints out on the slip. I like to think the small amount of tire growth offsets that.
Melting Slicks
Joined: Nov 2009
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no i dont think i have any slippage at that rpm because it couples quickly, im not a converter expert and locking in third wouldnt give me that much more mph or lower the rpm that much, the reason i never used the nitrous at the track dont have a built trans to shift into 4th and that still isnt a good idea if it was
On your PB run, what was your
mph
rpm at the stripe
gear
tire size (radial or bias)
.
Le Mans Master
Joined: Nov 2005
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From: Kendall Park NJ
I chose the TR6060 for my car and inputted the values. The resultant rpm was higher using their calculator versus mine. Transmission gear ratios are correct so I assume there is an issue in the actual calculations.