20's
03-05-2015, 06:14 PM
#1
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Thread Starter
Join Date: Oct 2014
Location: CALI.L.A.- Las Vegas
Posts: 251
20's
so everyone i bought my car with these 20's on it and havnt got around to find a fair price for a set of stocks
now since i broke my rear end what gear should i put in it to be about to do my burnouts and still be reliable ? tire size are 20/40/245
im thinking 3.42 what do i need to change my gears to 3.42 ratio
now since i broke my rear end what gear should i put in it to be about to do my burnouts and still be reliable ? tire size are 20/40/245
im thinking 3.42 what do i need to change my gears to 3.42 ratio
03-06-2015, 07:55 AM
#2
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Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 70,633
Re: 20's
Terrible choice for tire size. I'd get rid of the 20's, get a set of 17x9 or 17x9.5 wheels, and put 275/40-17 tires on them. They should have used a 245/30-20 tire to match stock tire diameter.
Compared to a 2.73 rear with say stock (optional) 245/50-16 (25.7") tires, your oversize (27.7") make the car accelerate like it had 2.53 gears (if there was such a ratio).
If you change the rear axle ratio, which is a $500-600 investment if you swap gears, here is what each available ratio will feel like:
3.23 will feel like 2.99
3.42 will feel like 3.16
3.73 will feel like 3.45
3.90 will feel like 3.61
4.10 will feel like 3.79
The 27.7" tires are really slowing the car down. Thin sidewalls will allow burnouts, because they provide poor straight line traction. The huge 20" wheels, plus the oversize tires consume a larger amount of HP during acceleration compared to smaller wheels and tires, and they reduce the effective ratio of the rear axle.
If you simply put the correct diameter tires on the car, a 3.42 rear will actually provide the torque multiplication of a 3.42, and not feel like a 3.16
Compared to a 2.73 rear with say stock (optional) 245/50-16 (25.7") tires, your oversize (27.7") make the car accelerate like it had 2.53 gears (if there was such a ratio).
If you change the rear axle ratio, which is a $500-600 investment if you swap gears, here is what each available ratio will feel like:
3.23 will feel like 2.99
3.42 will feel like 3.16
3.73 will feel like 3.45
3.90 will feel like 3.61
4.10 will feel like 3.79
The 27.7" tires are really slowing the car down. Thin sidewalls will allow burnouts, because they provide poor straight line traction. The huge 20" wheels, plus the oversize tires consume a larger amount of HP during acceleration compared to smaller wheels and tires, and they reduce the effective ratio of the rear axle.
If you simply put the correct diameter tires on the car, a 3.42 rear will actually provide the torque multiplication of a 3.42, and not feel like a 3.16
