Rear gear
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,106
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Thread Starter
Intermediate
Joined: Mar 2009
Posts: 40
Likes: 0
From: Holbrook New York
Rear gear
I am an old timer, won over 150 trophys in several classes. Just playing with my car for something to do. I didn't. Want to go to 315 or converter because I drive my car on vacatios and have crane low end power cam. Car ran 12.14 last year at Englishtown with Runflats. Was hoping to maybe gain 1or 2 car-lengths in 1/4 mile. Thanks
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,106
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
I am an old timer, won over 150 trophys in several classes. Just playing with my car for something to do. I didn't. Want to go to 315 or converter because I drive my car on vacatios and have crane low end power cam. Car ran 12.14 last year at Englishtown with Runflats. Was hoping to maybe gain 1or 2 car-lengths in 1/4 mile. Thanks
I've driven my '08 through 47 States and ran at several out-of-state tracks while touring, including Englishtown in '08. Last Summer I took a 5400 mile road trip, even though I currently have a 4000 stall converter. I've taken longer trips with stock, 3200, and 3600 stall converters. A 3200 drives almost like stock until you hit it. They aren't like the converters of our youth. It'll still lock up for 27-30 mpg road trips, while dropping nearly 3 tenths in the 1/4. You can't get bigger bang for the buck.
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Race Director
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From: Washington Township Michigan
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I currently have a 4000 stall converter. I've taken longer trips with stock, 3200, and 3600 stall converters. A 3200 drives almost like stock until you hit it. They aren't like the converters of our youth. It'll still lock up for 27-30 mpg road trips, while dropping nearly 3 tenths in the 1/4. You can't get bigger bang for the buck.
the torque convertor will be a lot more beneficial than a small gear ratio change.....................and about the same overall costs..................
Le Mans Master
Joined: Apr 2013
Posts: 5,376
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You're getting good advice in here. My vote would be for a 3200 FTI or Yank converter, and tune it so that that TCC locks up under cruise, and leave the gears alone. With good traction, that will put you deep into the 11s, without affecting your highway mileage. You should install a good trans fluid cooler too, preferably a plate type.
Supporting Vendor
Joined: Feb 2011
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2024 C6 of the Year Finalist - Modified
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A few years ago I ended up having to temporarily go backwards from 3.42 to 2.56 in my low 10 second race car and I hated it as the car actually felt sluggish around town.
Another anecdote that occurred is I swapped cars with my friend for a 20 minute test drive a few years back. My car at the time was still an LS2 running right around 11 seconds flat with a 3.15 differential and his was also a 2007 LS2, but with a blower and 2.56 gears. After the test drive we both agreed that my car felt like it pulled harder just driving around town, despite having at least 100 less HP.
Melting Slicks
Joined: Oct 2009
Posts: 2,004
Likes: 392
From: Long Island New York
I am an old timer, won over 150 trophys in several classes. Just playing with my car for something to do. I didn't. Want to go to 315 or converter because I drive my car on vacatios and have crane low end power cam. Car ran 12.14 last year at Englishtown with Runflats. Was hoping to maybe gain 1or 2 car-lengths in 1/4 mile. Thanks
Don't help him out to much guys, it's expensive staying infront of him.
