----- Original Message -----
From: <JD_Kemp@URSCorp.com>
> Cary Alpert writes:
> "Does anyone know the correct equation for determining
> the best shift points?"
>
> Cary-
>
> Equation? Dump the clutch, stomp on it, exhale, shift to second. Iffen
ya
> do it right, the car will squirt sideways around the first cone. Hold 'er
> in second until you can't stand the noise, then grab third. If ya run
> outta rip-ems in third, call me. I wanna run that course!
>
> Peace, Love & Pushrods-
> JD Kemp &
> "Lucretia MacEvil" #13 MGB
>
JD,
That might work with ol' British Rust, errrr, Iron :-) Rule of thumb is to
shift 10% past the hp peak, for example, if your car has a hp peak at 4500,
you would want to shift around 5000rpm, or redline, which ever is first.
Now, the REAL way to determine shift points.... You need to know the torque
or hp curve and gear ratios. Convert torque to hp, then multiply all hp
points by the gear ratios, where the hp number is less at the higher rpm,
than the lower rpm for the next gear is the time to shift.
Ron N. - Dalton, GA
former Brit Car Pilot (Triumphs!!!)
looking for a TVR (maybe :-)
90 SHO
84 300zxt
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