Shifting on Time

[Lou SG2340]

Being in high gear before the stop closes will soften the hit on the tires when the stop opens. I turn the stop on at .02 and shift at .04. Shifting after the stop goes thru its cycle is no different than shifting by rpm.

[SGSST109E]

Have you ever tried shifting before the stop?

[Lou SG2340]

Originally Posted by SGSST109E

Have you ever tried shifting before the stop?

No when I shifted by RPM I shifted after the stop opened. In my opinion the point of shifting by time is to shift after the stop closes. In shifting by time, when you close the stop & shift will depend on car weight, HP, & other veriables.

In my opion the car is more consistant & you will be on the stop for a shorter period of time by shifting by time while the stop is closed. Lou

[GaryGoFast]

How heavy is the car?
Does it have a 2 or 2 speed trans?
Whats the 1st # in the stop?
Air or Electric Stop?
Slow or fast car for class?

Super Street 2800 lbs., if your at or slightly above 2800 with a 2 speed trans, air stop, 4200 stop rpm, I shift at .75 and thats just after the car settles ON the stop. Heavy car low stop RPM = Bad thing for convertor.

[Lou SG2340]

First started shifting on time at 2500lbs 9.90 at 150 mph. T. stop is air 1 stop. PG trans 8" 6200 stall convertor.
Present car is 2260 lbs with same motor combination. 160 mph . Go on stop at .02 shift .05.Convertor slipage is 75 to 55% while on stop. Never had a convertor or trans problem while at 2500 lbs. Convertor in car has 300 passes on it slips 8% at finish line. Stop RPM is 4100. Lou

[jmarkaudio]

By shifting on time while on the stop you don't hit the tires as hard when the stop comes off. That may help on a marginal track.

[SGSST109E]

I agree but it hasn't been and issue on my combination. Just looking to make it more repeatable.