How to choose correct gearing?

[speED]

67 Camaro
3200 lbs
28" dia. M&h drag radial tire
630 flywheel horsepower
700r4 transmission
Dana 60 rear

Looking for ideal rearend gear ratio for quarter mile racing.

[Skip Fix]

HP peak on the motor? Want to run the quarter with all 4 gears or just 3?

Generally want to be at the finish line at or 500 rpm above peak HP. Some guys do want to use all 4 gears on an OD tranny, others just 3 especially if does more street service.

[speED]

Looking to use only 3 gears for quarter mile. 630 HP @ 6500 rpm's

[sam 74]

there are calculators to give you an idea of where you want to be, off the top of my head with a 28" tire with a 1to1 final gear you'll want to use something like a 4.11 or 4.30.

[speED]

Thanks Sam, I'm actually running 4.30's. A little difficult to control excessive wheel spin on the street.

[66SuperSport]

Try this

http://www.apexgarage.com/tech/gear_ratios.shtml

[speED]

Thanks Chris

[TheJDMan]

When I was drag racing Dust Off back in the 70's I was running a T-10 with a 4.88 rear gear and 28" slicks. I lauched and shifted at 7000. I would cross the 1/4 mile at 6500 in fourth gear. Of course the 4.88 is totally useless on the street.