OK, I'll play...
Don,
I think anybody somewhat familiar with GM transmissions in general, and the differences between a modulated line pressure and a TV system can understand the differences here.
OLd style GM 3 speed, engine vacuum (or lack thereof)= greater engine load. This causes the modulator valve to increase line pressure. Nearly instantaneously, as you said real-time input.
The TV cable is USUALLY a linear device and therefore cannot in anyway except throttle position determine the input torque delivered from the motor.
So in effect a STOCK TV cable geometry will not compensate for a motor that makes huge torque down low. Say a 500+ cube BBC with a supercharger. Instant torque delivery at even a very low throttle angle when the TV system hasn't gotten the line pressure up to higher levels.
As Chris stated he expects to see a linear rise in line pressure with throttle opening.
I think a "bellcrank" linkage could be made to cause a more pronounced rise in line pressure at lower throttle openings, and then level off near WOT. This would work better on huge torque motors.
However a TH400 and Gear Vendors unit would work well and be about the same price, better longetevity IMO..
Don,
I think anybody somewhat familiar with GM transmissions in general, and the differences between a modulated line pressure and a TV system can understand the differences here.
OLd style GM 3 speed, engine vacuum (or lack thereof)= greater engine load. This causes the modulator valve to increase line pressure. Nearly instantaneously, as you said real-time input.
The TV cable is USUALLY a linear device and therefore cannot in anyway except throttle position determine the input torque delivered from the motor.
So in effect a STOCK TV cable geometry will not compensate for a motor that makes huge torque down low. Say a 500+ cube BBC with a supercharger. Instant torque delivery at even a very low throttle angle when the TV system hasn't gotten the line pressure up to higher levels.
As Chris stated he expects to see a linear rise in line pressure with throttle opening.
I think a "bellcrank" linkage could be made to cause a more pronounced rise in line pressure at lower throttle openings, and then level off near WOT. This would work better on huge torque motors.
However a TH400 and Gear Vendors unit would work well and be about the same price, better longetevity IMO..