A6 with 3:42 gears?
Melting Slicks
Joined: May 2005
Posts: 2,231
Likes: 0
From: Brownsville Tx
Thats an awesome time there on the 3.15's!! What other mods did you do to get the car to run that?
Last edited by jogar80; May 1, 2008 at 12:59 PM.
Melting Slicks
Joined: Jul 2007
Posts: 3,097
Likes: 5
From: Brentwood World's first A6 in the 9's (including N/A, blower, turbo and nitrous cars) 9.950@139.267 CA
- Vararam CAI with throttle body spacer
- American Racing headers
- Comp Cams camshaft (230/236, 591/601, 113 LSA)
- 3000 Stall converter
- 3.15 differential
- Borla Stinger Catback
- MT Street ET radials
Here's a video of the run if you're interested:
http://s155.photobucket.com/albums/s...0315144555.flv
Heel & Toe
Joined: Aug 2007
Posts: 17
Likes: 0
Absolutely no difference on the track with 3.45's over 2.92 in a H/C Holden/ Pontiac G8.
Car ran 12.02 with 2.92's @117 then 12.03 with 3.45's stock stalled and over 3900 lbs.
Was trapping at 6700 approx rpm with 2.92 in 3rd, now traps at 6100 approx with 3.45's. in 4th.
Another car here did the same thing and had exactly the same result as me no improvement at all.
cheers
Car ran 12.02 with 2.92's @117 then 12.03 with 3.45's stock stalled and over 3900 lbs.
Was trapping at 6700 approx rpm with 2.92 in 3rd, now traps at 6100 approx with 3.45's. in 4th.
Another car here did the same thing and had exactly the same result as me no improvement at all.
cheers
Melting Slicks
Joined: Jul 2007
Posts: 3,097
Likes: 5
From: Brentwood World's first A6 in the 9's (including N/A, blower, turbo and nitrous cars) 9.950@139.267 CA
Absolutely no difference on the track with 3.45's over 2.92 in a H/C Holden/ Pontiac G8.
Car ran 12.02 with 2.92's @117 then 12.03 with 3.45's stock stalled and over 3900 lbs.
Was trapping at 6700 approx rpm with 2.92 in 3rd, now traps at 6100 approx with 3.45's. in 4th.
Another car here did the same thing and had exactly the same result as me no improvement at all.
cheers
Car ran 12.02 with 2.92's @117 then 12.03 with 3.45's stock stalled and over 3900 lbs.
Was trapping at 6700 approx rpm with 2.92 in 3rd, now traps at 6100 approx with 3.45's. in 4th.
Another car here did the same thing and had exactly the same result as me no improvement at all.
cheers
Come this Wednesday however I'll be able to confirm or deny those numbers once I get back to the track again.
Pro
Joined: Sep 2007
Posts: 747
Likes: 0
From: S. Jersey .............. Low 11sec club
St. Jude Donor '11
Looking forward to your results. Good Luck!
Melting Slicks
Joined: Oct 2006
Posts: 2,228
Likes: 5
From: Gainesville Georgia
To the O.P - A friend of mine has this paddle mod called "The Paddle Reverse Mod" if I remember correctly. I know this has nothing to do with the gearing or anything, I just figured I would tell you about it so you can look it up or someone on this forum could explain what it is better than I can. I couldn't get in touch with my friend to ask him where he got it. I'm sure a search would find it though. He likes it alot that's all I know. 
Good luck with the gears
Good luck with the gears
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
Absolutely no difference on the track with 3.45's over 2.92 in a H/C Holden/ Pontiac G8.
Car ran 12.02 with 2.92's @117 then 12.03 with 3.45's stock stalled and over 3900 lbs.
Was trapping at 6700 approx rpm with 2.92 in 3rd, now traps at 6100 approx with 3.45's. in 4th.
Another car here did the same thing and had exactly the same result as me no improvement at all.
Car ran 12.02 with 2.92's @117 then 12.03 with 3.45's stock stalled and over 3900 lbs.
Was trapping at 6700 approx rpm with 2.92 in 3rd, now traps at 6100 approx with 3.45's. in 4th.
Another car here did the same thing and had exactly the same result as me no improvement at all.
And I mean EXACTLY the same?
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Racer
Joined: Dec 2003
Posts: 346
Likes: 10
From: New Orleans La
Gear changes in reality only effect 1st gear. If your car has trouble with bogging then maybe I would consider a gear change, but for the majority of C6 drag racers, traction would be a much larger problem. All a gear swap does is shorten the gears mph range and make the tranny shift more often. That's why typically even a radical gear swap only nets a .1-.2 eta change. It's all made in the first 40 feet or so and after that your car progresses down the track just as it normally does. I'd do a 3000 stall torque converter long before I did a gear swap.
Pro
Joined: Oct 2007
Posts: 708
Likes: 0
From: Mandeville LA
Gear changes in reality only effect 1st gear. If your car has trouble with bogging then maybe I would consider a gear change, but for the majority of C6 drag racers, traction would be a much larger problem. All a gear swap does is shorten the gears mph range and make the tranny shift more often. That's why typically even a radical gear swap only nets a .1-.2 eta change. It's all made in the first 40 feet or so and after that your car progresses down the track just as it normally does. I'd do a 3000 stall torque converter long before I did a gear swap.
Drifting
Joined: Jul 2001
Posts: 1,978
Likes: 4
From: San Diego CA.
Good luck Christopher.
Racer
Joined: Dec 2003
Posts: 346
Likes: 10
From: New Orleans La
Previously I might have agreed about using more gear to minimize the dips in the powerband but with the advent of the A6 and the tighter ratios, I don't see that as being such an issue as it was in the A4's. Generally all increasing gear does in these cars is cause you to smoke the tires all through first gear. One good tip if you do plan to do a gear swap is to match the top of 4th gear to the mph you need to cross the lights at. So 4th gear@6500 rpms should be 120 mph or so(more or less depending on your hp). If you're not willing to modify your gearing upwards to that ideal number then you're wasting your time/money. I just ran some non-exact numbers but to get those kind of rpms you'll probably need upwards of a 3.60 rear gear to be ideal.
Last edited by Demented; May 16, 2008 at 02:13 PM.
Safety Car
Joined: Nov 2007
Posts: 4,537
Likes: 1,404
From: Bethesda MD
A good torque converter makes an big improvement. People with 2.56 geared cars would be amazed by the gains. I'd love to see a stock geared car with a 3200 stall line up against a 3.42 car with a stock stall. That would be an interesting race.