Thread: Hello Please help?????

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I need help on my drivetrain I am scared that I will top out this is what I will have: 3800-4000 stall a 2speed powerglide and 4.56 rear end gears will I be ok I want to race 1/4mile and 1/8mile?

well how tall is the rear tire ? and how hi do you want to rpm the engine?

28 or mabey 29 I dont know have not disided yet what is a good size?

With a 4.56 rear, 1:1 trans ratio (high gear in a powerglide), and 28" tires, you'll max out at 110mph at 6000rpm, if your motor can rev that high.

With 29" tires, you'll max out at 114mph at 6000rpm

I estimate mid11's in the quarter so I will be going faster than 114 so what do you suggest I do?

Originally Posted by HotRodKush

With a 4.56 rear, 1:1 trans ratio (high gear in a powerglide), and 28" tires, you'll max out at 110mph at 6000rpm, if your motor can rev that high.

With 29" tires, you'll max out at 114mph at 6000rpm

So get some 44" tires...mudbogger/drag racer!!


I'm pretty much worthless...sorry.

Originally Posted by Speed Freak

I estimate mid11's in the quarter so I will be going faster than 114 so what do you suggest I do?

Smaller rear end ratio, much larger tires, or a transmission with an overdrive. Go to www.bgsoflex.com and click on "rpm and mph correlation" or something along those lines - it'll give you a calculator that you can use to try out different combinations. I think the site is down now though, if you go here: http://clubcamaro.net/index.php?page=bg_rpmmph it's the same calculation on a different site.

Yea I think I will use a 30 or a 31in tall tire. Thank you!