gear shift and the dyno

[Joe DeMarzo]

How would you use the dyno sheets to help determine what to shift 1st to 2nd and then 2nd to 3rd in a small block stocker? We use the dyno sheets as a guide for the converter stall, is there a formula or guide for torque & HP in relation to shift points? Then it will be time to test that theory. How does everyone determine before testing what to shift at their cars at?

[ron mattson]

this is a very good question, i use peak tq to figure stall speed and peak hp for shifts
and then look at the playback to see where motor falls back to after each shift and
adjust accordingly. P.S. Joe you have p.m.

[Joe DeMarzo]

Ron, I have PMed you back.

[Dinsdale]

Dyno with shift simulator.. This is cool!

[Owen S Quirion]

Joe,

The way I do it is to determine the RPM drop going from 1-2. Then look at your Torque curve to find the peak and also see how flat the curve is around the peak. I take the net rpm difference and overlay that around the torque peak to try to take as much advantage of the flattest part of the torque curve when the engine is recovering from the shift. For the 2-3 I would run the car out closer to the HP peak using the same RPM Drop philosophy.

[Mike Taylor 3601]

Superflow says about 10% above peak, on glide that work pretty good,but 3 spd. or stick is a little much for low gear, what I always have found is usually shift low as soon as can without bogging then second close to peak to about 10% above peak hp rpm.
Like everything else depends on lots of factors,closer ratios are together less you'll need
to stretch out that gear,most cases the sooner you can get in high gear the quicker it will be.
Mike Taylor 3601

[Glenn Briglio]

Originally Posted by Dinsdale

Dyno with shift simulator.. This is cool!

Who makes this for engine dyno ?

[Kevin Musial]

Originally Posted by Glenn Briglio

Who makes this for engine dyno ?

That looks to be a Depac dyno systems controller.
https://www.depac.com/loadcontrol.htm