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Thread: 3.90's worth about 2 cars
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05-20-2010, 08:28 PM #1
3.90's worth about 2 cars
After installing the 3.90's, I thought that it would be helpful for others to know what they feel like. They feel like a 50 shot of nitrous. I have a buddy with a 300 which is generally dead even or he nudges me by a nose in the quarter. With the 3.90s its an easy 1.5 cars my way. I hope this helps.
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05-20-2010, 08:33 PM #2
- Join Date
- Sep 2005
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- Port St. Lucie Fl
- Age
- 51
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- 31
Black- 2008 C6 Corvette LS3
Hows the fuel economy? Also would you think 4:10's are better?
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05-20-2010, 10:53 PM #3
- Join Date
- Sep 2006
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- Canby, Oregon
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- 36
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- 2,121
Pewter- 1999 Camaro SS-M6 #1775
i love my 3.90s deff. made a difference
1999 Camaro SS/ Pewter/ #1775 - LS1 6-speed - Predator 3 Custom Tune - Pro 5.0 - LS7 Clutch - 3.90's - Koni's - Strano Springs and Sway Bars - SFC's - Full UMI Chassis and Suspension - LS6 Intake PnP TB - ARH LT's and Kitty Ran Away - Magnaflow.
12.6 at 112
http://www.fquick.com/Tyler_LS1
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05-21-2010, 05:08 AM #4
- Join Date
- Jan 2010
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- East of Cleveland, Ohio
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- 3,827
Black- 99 WS.6 - Modified
If the car is a A4, 3.73s or 3.90s are a good gear choice. 4.10s are good for a M6. My opinion, but many seem to agree.
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05-21-2010, 09:45 AM #5
Hadn't notice a change in fuel economy. I mostly run on the street so 3.90s are almost too much. 4.10s would simply spin. it depends on hp level. If you are stock with LT's to about 400rwhp get 4.10s If you make 400-550, 3.90's, above that you're probably boosted and need 3.42s. Just my opinion for the street.
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05-21-2010, 10:07 AM #6
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05-21-2010, 10:20 AM #7
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