DD gear change advice.
DD gear change advice. Hello,
Im working on putting together a 2002 camaro m6. When completed the car will have an LQ9 forged bottom end, TFS 225cc heads, and an EPS custom grind cam and FAST 92/92. I think ill be making close to 480whp (i know i have high hopes...)
Anyway im going to put in a MWC 9" rear with all the suspension components, but im stuck on gears. Im gonna DD this car, so i dont wanna give up to many mpg's. I know alot of guys with m6 cars do the 4.10 gears, but what about 3.9?
I know the difference is about 300RPM when cruising at 60, but how much does that affect the mpgs? anyone done this, or any input in general?
Thanks
Im working on putting together a 2002 camaro m6. When completed the car will have an LQ9 forged bottom end, TFS 225cc heads, and an EPS custom grind cam and FAST 92/92. I think ill be making close to 480whp (i know i have high hopes...)
Anyway im going to put in a MWC 9" rear with all the suspension components, but im stuck on gears. Im gonna DD this car, so i dont wanna give up to many mpg's. I know alot of guys with m6 cars do the 4.10 gears, but what about 3.9?
I know the difference is about 300RPM when cruising at 60, but how much does that affect the mpgs? anyone done this, or any input in general?
Thanks
Registered User
Joined: Jan 2013
Posts: 5
Likes: 0
I'm in the same debate myself. My cousins ss has them and he swears on back roads it made it a lil better and didn't effect the highway but maybe one or two but then again if we were worried MPG we would be driving civics haha
You say it's a DD, do you plan on 1/4 mile racing it? If you are then the gear ratio you choose is dependent on things like tire size and rpm through the traps. If you're not going to race it then 3.89s will work good for you. I lost 1 mpg around town with my 4.10s, don't know about highway milage change as I haven't had the car on any long trips. With the T56 double overdrive steep gears aren't the handicap they used to be for a DD.
You say it's a DD, do you plan on 1/4 mile racing it? If you are then the gear ratio you choose is dependent on things like tire size and rpm through the traps. If you're not going to race it then 3.89s will work good for you. I lost 1 mpg around town with my 4.10s, don't know about highway milage change as I haven't had the car on any long trips. With the T56 double overdrive steep gears aren't the handicap they used to be for a DD.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
