Hey guys, Consider this idea...
Use a General Motors MAP sensor instead of TPS input. This would give you a true load value.
EDIT: Did the math. I'm going this route.
GM 2bar map sensor has a voltage slope of roughly v=2.45+.17x ... X being PSI.
The lower voltage limit accepted by the TCS is .31v, with a 4.9v maximum, so you have anywhere between "-12.5psi" (Which is somewhere around 26 in/hg) and 14.31psi to work with....
The TCS has 10 steps in it's load table, and to make tuning easiest, it is helpful to have atmospheric pressure be one of the major axis.
The minimum voltage is going to be .31v (-12.5psi), so that we have as high of resolution as we can in the lower load ranges.
Given that, we need to find a step that will iterates up evenly to get to "0psi"... If you set the maximum tps voltage to 10psi, which is 4.15v, there is a 2.5psi step, giving you the following scale for load:
I'm sure you can do the same math for a naturally aspirated application.
This should gretly improve driveability, since, as load on the motor decreases, vacuum will increase, and a shift can be triggered. It seem much more logical than having to wait to achieve a certain speed, or modulate your throttle position in order to induce a shfit.
Megasquirt EMS, Vortech Superchargers, Renegade Racing, Gator1980Transmission, Innovative Motorsports, Devil's Own, Magnaflow, Eibach, KYB, Kooks
Last edited by Silenced; 04-20-2010 at 10:15 AM.