Gear Selection
Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,687
Likes: 86
From: De Pere, WI
Gear Selection
Need advice on gearing....Car is a C5 'Vette, M6 manual trans, roughly 1,100whp, 28" tire. I am wanting to go 8.90 - 9.0. I currently have 3.90 gears and with those gears I could theoretically hit 160mph @ 7500 RPM. Should I keep the 3.90s or go with 3.73s which theoretically give me 167 at the same RPM.
AMP Racing
Joined: Aug 2006
Posts: 10,753
Likes: 587
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
Even with 3.73, that's a pretty high SLR for 1100 hp.
Seems most corvettes will use a 3.42 ratio once they get to that kind of power level. Likely because it's difficult fitting a taller tire than the 28".
If you move forward with the solid rear/4 link setup, perhaps a 3.50 ratio might work well.
Seems most corvettes will use a 3.42 ratio once they get to that kind of power level. Likely because it's difficult fitting a taller tire than the 28".
If you move forward with the solid rear/4 link setup, perhaps a 3.50 ratio might work well.
AMP Racing
Joined: Aug 2006
Posts: 10,753
Likes: 587
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
Starting Line Ratio.
http://wallaceracing.com/calc-slr.php
It determines how hard the tire is hit.
Configure your SLR, shocks, and suspension geometry to get the maximum traction and forward movement at the hit.
http://wallaceracing.com/calc-slr.php
It determines how hard the tire is hit.
Configure your SLR, shocks, and suspension geometry to get the maximum traction and forward movement at the hit.
Last edited by C5 Pete; Jun 5, 2017 at 08:30 PM.
Burning Brakes
Joined: Dec 2010
Posts: 1,223
Likes: 360
From: Southington CT
Question: Have you ever been drag racing before? I think I know the answer. You need a lot more than just HP to achieve an 8.90-9.00. Just ask 427 HOTROD he has way more than 1100 HP and hasn't gotten the 8.XX timeslip yet. Nobody can give you any real definitive direction without knowing a ton more information about your car. More specific info would be helpful.
Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,687
Likes: 86
From: De Pere, WI
Question: Have you ever been drag racing before? I think I know the answer. You need a lot more than just HP to achieve an 8.90-9.00. Just ask 427 HOTROD he has way more than 1100 HP and hasn't gotten the 8.XX timeslip yet. Nobody can give you any real definitive direction without knowing a ton more information about your car. More specific info would be helpful.
What further info would you like?
AMP Racing
Joined: Aug 2006
Posts: 10,753
Likes: 587
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
Kyle ran his nitrous car to low 9s with a 6 speed and 3.42 in an IRS corvette. I think he had a 402" LS with a boatload of nitrous.
I'm sure you've researched it a bit and have seen his setup. I don't remember which trans he had.
I'm sure you've researched it a bit and have seen his setup. I don't remember which trans he had.
