What is the best axle ratio for a camaro upgrade from stock 2.73 gearing?

Question

max rpm is 4400 and cruise currently 1600 at 65mph

this is the v8 i want it to be faster and currently does 70 in 2nd gear which is way to big for an automatic

Answer 1

I wouldn't go lower than 3.73, I don't think you'll be too happy with it. You could use a 4.11 in that car and still get away with it however.



With a 3.73 your RPM at 65 will be 2186. If your redline is 4400 your top speed would be about 130.



With a 4.11 you would be doing 2859 RPM at 65, and your top speed would be about 100mph at 4400 RPM.



Bear in mind you will lose 20 - 30% of your fuel economy if you do this.



If you were going to change your axle ratio that much, you might need to get a shift kit for your transmission as well, since your potential acceleration would be a lot faster. I ran a 4.11 in an old Impala, and while it really brought the car alive, I got tired of how much it revved on the highway, and went back to a 3.23.

Answer 2

3.42's would be liveable on the street. 3.73's would be better if you don't mind a touch of fuel enonomy loss. 4.10's are out of the question because of your terrible cylinder heads and "milk toast" camshaft.



There's no way on this grean earth that a stock 305 will go anywhere near 125 with 3.73 gears. It'll run out of steam and go flat @ 5,000 RPM. You might squeeze 105 - 110 if the motor was new and sharp with 3,73's.



I had a 350 horse 327 in a 65 Chevelle that would bury the needle @125 and the tachometer read 5,500. That was with a four speed with a 1-1 high gear. No overdrive!



Think about my little English class would you? Start sentences with capital letters and learn what I told you earlier today, when to use to, too and two.



You don't read replies or pay a bit of attention.

Answer 3

You could go all the way to 4.10, but your top speed would be like 95MPH lol. Would accelerate like holy hell though.



Personally, I've always been a fan of really low rear gears. I'd keep the 2.73.

Answer 4

3.55 if you just want to be faster.



3.73 if you don't care about mpg and really want to go fast.