At the track ive noticed after I put my 3.73s in im VERY close to going into overdrive, sometimes right when i go through the traps it shifts into OD.

So I hooked up the LT1 to datamaster yesterday and it showed at 3rd gear @ 5700 RPM i was only going 107. Calculators show I should be at around ~115 @ 5700 RPM...

Im just wondering after I start trapping a little higher what will I need to do... Its like i have a 4.10 in my car lol

-Robert

 

Taller tire, or you can drop down to 3.42s

 

No way will I take out my brand new 3.73s... What drag radials are 28'' tall?

 

FWIW, the rpm/mph discrepancy is due to converter slippage.

Rich Krause

 

bfg 275/60/15 drag radials are 28" according to jegs, thats what i run and there are no clearance problems at all on my car.

 

If you don't want to go with a full 28" tire (sometimes has clearance issues), you could look at the Hoosier QTP 27" tires. They're the best hooking drag radial IMO.

 

So when I get my vigilante converter should these problems go away?

-Robert