Rear gears
Melting Slicks
Joined: Mar 2008
Posts: 2,666
Likes: 289
From: Spring Park MN
A lot depends on traction too. If you have a car that has traction problems with say 4.11 gear, going to higher gearing, lower numerically, may help with traction.
If there is abundant traction lower gearing, higher numerically, will usually accelerate quicker and get better 60 foot times.
That being said, in drag racing you usually want to go through the traps at max RPM for your engine in high gear. Not overdrive though, 1 to 1 transmission gearing. Direct is the most efficient gear. This is probably not how you would want to gear a street car, unless of course you have overdrive for street/highway use.
Mike
If there is abundant traction lower gearing, higher numerically, will usually accelerate quicker and get better 60 foot times.
That being said, in drag racing you usually want to go through the traps at max RPM for your engine in high gear. Not overdrive though, 1 to 1 transmission gearing. Direct is the most efficient gear. This is probably not how you would want to gear a street car, unless of course you have overdrive for street/highway use.
Mike
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,794
Likes: 430
From: Aarhus, Denmark
A lot depends on traction too. If you have a car that has traction problems with say 4.11 gear, going to higher gearing, lower numerically, may help with traction.
If there is abundant traction lower gearing, higher numerically, will usually accelerate quicker and get better 60 foot times.
That being said, in drag racing you usually want to go through the traps at max RPM for your engine in high gear. Not overdrive though, 1 to 1 transmission gearing. Direct is the most efficient gear. This is probably not how you would want to gear a street car, unless of course you have overdrive for street/highway use.
Mike
If there is abundant traction lower gearing, higher numerically, will usually accelerate quicker and get better 60 foot times.
That being said, in drag racing you usually want to go through the traps at max RPM for your engine in high gear. Not overdrive though, 1 to 1 transmission gearing. Direct is the most efficient gear. This is probably not how you would want to gear a street car, unless of course you have overdrive for street/highway use.
Mike
So a good idea would be, keep the 3.70, if the wheels doesn't spin @ WOT in first, then go for 4.11?
Melting Slicks
Joined: Mar 2008
Posts: 2,666
Likes: 289
From: Spring Park MN
Mike
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,794
Likes: 430
From: Aarhus, Denmark
Regards,
John
Pro
Joined: Jul 2012
Posts: 707
Likes: 147
From: St. Petersburg Florida
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
With 3:70 gears and a strong running engine, you are already on the edge of maximum traction. Unless you are going to slicks or some serious sticky tires, the tiny fraction of a second gain isn't worth it. Ripping out of first into second at 30 mph is fun but at 20 mph screaming past redline is looking for trouble down the road. IMHO
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
If you're not going to be running the car on a track and you already have a 3.70 rearend, I think you should go with the 3.70. The 4.11 gear would make the car quicker if you have traction, however the 4.11 rear will give you more mechanical advantage making it more likely that you would have traction problems.
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Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,794
Likes: 430
From: Aarhus, Denmark
With 3:70 gears and a strong running engine, you are already on the edge of maximum traction. Unless you are going to slicks or some serious sticky tires, the tiny fraction of a second gain isn't worth it. Ripping out of first into second at 30 mph is fun but at 20 mph screaming past redline is looking for trouble down the road. IMHO
If you're not going to be running the car on a track and you already have a 3.70 rearend, I think you should go with the 3.70. The 4.11 gear would make the car quicker if you have traction, however the 4.11 rear will give you more mechanical advantage making it more likely that you would have traction problems.
