Visit The Dirt Forum for More Information

Author Topic:   Which gear
KrisA
Dirt Newbie

Total posts: 3
posted May 09, 2005 10:08 AM  
I need to know which gear you run in with a 350 turbo tranny, with 373 gears. I tried 1st but had too much rpm, was running almost 7grand.

sideways
Dirt Forum Champ
Total posts: 715
posted May 09, 2005 10:22 AM  
th350 1.52 second gear,2.52 first gear and drive 1.00.Take the rear gear and multiply the gear you want to run in and it will give you final drive.We run 2.41(rear gear)x2.52 in first =6.07 final drive.

KrisA
Dirt Newbie

Total posts: 3
posted May 09, 2005 10:36 AM  
Sorry wrong rear gears...I'm running 3.70 in the rear. when I calculated that I am running 9.32 final drive. I tried it in drive on a test run yesterday, drove like a champ. But I am still not sure. Does that work for a chevy or ford 9" rear end?

sideways
Dirt Forum Champ
Total posts: 715
posted May 09, 2005 01:37 PM  
As long as you know what rear gear it is and gear in the tranny you are running in it does not matter.I am sure you dont need 3.70 final.On a 1/4 mile dirt generally 6.00-6.50 final drive some a 5.83.What size is the track you run on?We run 6.33 or 6.00 final drive on 1/4 mile tryed 6.45 to much for me but it works well on 1/5 mile.5.43 is what we use on 1/2 mile.

racer17j
Dirt Forum Champ
Total posts: 5390
posted May 09, 2005 05:42 PM  
quote:
Originally posted by racer17j:
it all depends on the track size,rpm you want to run and rear tire roll .run a tape around the rear tires and get the roll out then let us know the track size what you have for a motor and what rpm your cam calls for

Am curious about a gear also for a 1/4 mile dirt track. 3000lb car with a decent motor. would hope to keep the r's around 6 grand with 88 inch tires. No more than 6500 for sure. We have run like 6.27 on a 3/8ths and 5.38 on the 1/2...I was thinking it would take more in the 7 range for a gear? Any help peoples? Thanks, The Dog

racer17j
Dirt Forum Champ
Total posts: 5390
posted May 10, 2005 08:41 PM  
with that tall a tire 7.0 would be a good starting point

    

Back to the Archives