How much of a gain do you see me getting in the 1/4 & in the 60' by re-stalling my Vig3200 to 3600 stall & runnuing a full slick? My times now are consistant 12.3's on 1.64 60's with a 3700 # Race WT.

Thanks
Eddie

 

What is your current tire size, finish line rpm, and gear ratio?

 

I'm running MT ET Streets 26 x 11.5 x 16
My gears are 3.73's
My RPM have to be 5500 RPM if not more at the finish line. Can't remember....

 

Not sure of what your entire setup consist of, but 3200 to a 3600 should easily put you in the LOW 12.20 area. With that up grade you'll flash to 3800. I'm sure if you can drop the race weight close to the 3600 mark you should see some 1.5 60' times and 12 teens.
Steve...

 

Your tire diameter from the MT tire specs is 26.2"
Finish line rpm = 5500 (probably close enough)
Finish line mph = 108.13
Gear ratio = 3.73

That gives you a converter slip of 6.0%
Even assuming you get some tire growth to 26.5", that only increases the converter slip to 7%.

It's going to be hard to improve on that. Going to a looser converter may increase your ET if it brings the engine up into a better power band but your mph will decrease.

The ET street tire have the same rubber compound as ET Drags. The only difference is the tiny rain grooves to give it a DOT rating. You'll only see an improvement if the ET Street tires are not hooking up any more. I doubt it with 1.6x 60' times.

If you want to get a quicker ET then have the car go on a diet. 3700 pounds is a lot of weight and can easily stress or break parts.

In a heads up race you want to go as fast as possible. In a bracket race you want consistancy. You already say it runs consistant 12.3's.

 

Smokn- have you encountered the 2-3 non-shifting problem yet?

 

I did but I had Bryan @ www.pcmforless.com take care of it through programming. No problems since. Now I don't have to worry about it cause I am getting an FLP Level 4 trans which is vaccum modulated so it will never happen again....