I've read so many arguments about when to shift. Interestingly, in the Skip
Barber Racing book "Going Faster", the only mention on getting to speed is
to shift at the redline. This is stated in, like, one sentence, and the
rest of the entire book is on stopping and turning....
Chris Thompson
B382000331
> -----Original Message-----
> From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net]On
> Behalf Of Bob Palmer
> Sent: Wednesday, February 21, 2001 11:43 AM
> To: Fraser, Ron; tigers@autox.team.net
> Subject: RE: E-Mail me off the list
>
>
> Larry,
>
> It's interesting that this kind of mis-information is so pervasive. The
> torque curve is definitely not what you want to use to pick the shift
> points, although there seems to be a fair number of people out there that
> seem to believe it. There are computer programs that will compute quarter
> mile times based on your dyno data, car weight, gears, etc. They
> all use the
> right physics as far as I know. However, a lot of "seat of the
> pants" racers
> seem to have lost the rabbit.
>
> Bob
>
>
> -----Original Message-----
> From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net]On
> Behalf Of Fraser, Ron
> Sent: Wednesday, February 21, 2001 8:18 AM
> To: tigers@autox.team.net
> Subject: RE: E-Mail me off the list
>
>
> Larry
> I'm not sure about the 80% part but I did see an explanation about
> shift points.
>
> You need to look at your engine's Torque Curve and you need to know
> what the RPM change is for each of your transmission gears. The
> idea was to
> shift at an RPM after peak torque that would bring you to that same torque
> value before peak torque. This uses the Max Torque of the engine
> to propel
> the car. This seems to make sense but I do not know if will get you down
> the track any faster. I have never drag raced, only short bursts on the
> street, so I'm no expert.
> Ron Fraser
>
> -----Original Message-----
> From: Larry Paulick [mailto:larry.p@erols.com]
> Sent: Wednesday, February 21, 2001 8:58 AM
> To: Bob Palmer
> Cc: cvaught@hawaii.rr.com; tigers@autox.team.net
> Subject: Re: E-Mail me off the list
>
>
> Bob, interesting point on the shift points. I understand having the
> revs in the sweet spot, but how did the 80% come about.
>
> If I have the stock motor and cam from the 90 5.0L, and its max hp is at
> 5200 rpm, the the shift point is 6500 rpm. That is quit a jump, and
> with stock valve train, mainly springs, I am sure that valve float would
> become a problem.
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