3/8th mile gear for 383 - IMCA modified

[lledford]

I am fairly new to imca modifieds. My car has a fairly stout 383 and with a 6.0 final drive. Will this gear work ok for a 3/8 mile track? I am looking to stay around 6500 to 6800 rpms. I have been told a 6.0 final drive is a good overall gear for most tracks. Will this final drive stay within the above rpm range on a 3/8 mile track? Thanks

[Dirtracer50]

Tracks can vary greatly even when called a 3/8. I race on a couple of pretty fast 3/8 tracks and usually run a 5.29 or 5.43 and turn 7-7400 rpm. not sure how much help that is but if you post the track you intend to run someone may have better info for you.

[Confused?]

Depends on the track. Ours is a 3/8 and anywhere from a 5.67 to 6.0 is run. Another 3/8 in south Texas would use a 5.43 to 5.83.

[LateModel B23]

We ran a 5.43 @ Devils Bowl with a well built 383 and AR tires.

[lledford]

Thanks guys. I will be running cotton bowl speedway in Texas. Again, I would like to stay around 6800 rpm. I am assuming 6.0 final dive would put me in 7000 to 7500 range?

[Confused?]

It will. That's what I had when I ran there. I had a 7600 chip in mine and never hit it. I do know, the really fast cars are not running that low of a gear.

[mod88s]

If you want to be around 6500-6800 at cottonbowl, you will need to run a 5:67 or 5:83. Also depends on how much lightweight stuff you have in your motor and your cam selection.

[lledford]

If anyone has a 5.43 ratio ford 9" third member, full spool for sale in the Dallas, Ft. Worth area, send me a private message. Thanks

[LateModel B23]

PM was sent