I just thought I would throw this question around and see what everyone thinks. I presently have a 10 bolt with 3.23 gears. I like the performance. The thing is , I am putting in a Moser and the standard ratio for them are 3.25, 3.50, 3.70, 389 . Ok this is where I am . I had a 700R4 built for me .I had a motor built 383 with 430 hrspower and 470 tourque . I want this to be a daily driver. What gears do you recommend for daily driver. I am going to use a trutrac diff for daily driver pumpkin. I would like to buid a full spool for the track to play on too. But right now is figuring out what gears are working best for you all on the streeet. I never had this horspower under the hood before . I had a 305 with a few mods, don't get me wrong the 305 worked damn good . I am just wandering because maybe I should just put a gear in it that will do both worlds. What do you guys think. Thanks for any info .

 

So, when you ran the car on the chassis dyno, where is its power curve? At what RPMs did it make peak torque and peak HP? Scan & post your dyno sheet.

All of this "430 HP" kind of stuff is pretty much irrelevant, without that. Unless you have a real-life, real-world, in-operation MEASUREMENT, with the total output vs RPM curve included, and not just some kind of a guess, then any gear choice will just be a guess too.

That said, with a 700, 3.70ish is usually about as far as you want to go, for the street.

 

My car will never see a chasis dyno sorry. They do not have them up here. There might be one within a days drive. Too far for me. Canadas fastest street car The Nuclear Banana is from just up the road . It never seen a chasis dynoe. My motor is crank hrspower from a dynoe. I am just asking what people are running for gears on the street and what they are happy with .

 

Well then, post your engine dyno graph.

Anything that tells what RPMs it makes its power at, is useful. The idea is to pick a gear that allows YOUR SPECIFIC UNIQUE engine to stay within the RPM range that IT produces the most power.

Just hearing that "so-and-so has x.xx gears in his car and it's fast" doesn't mean that you can put the same gears in your car and they will be the best choice. Doesn't matter that it's even in one of these cars; the wrinkles on the sheet metal don't have much to do with gearing.

Like I said, with a 700 and its DEEP 1st gear, 3.7x is pretty much the end of the line, for the street. Not only because the engine will redline before it can shift out of 1st, but also because you'll end up with SO MUCH torque multiplication, that it will be useless. It'll just blow the tires off and tach out even quicker.

Car weight in race trim (or however it is that you intend to optimize it for) would be another useful parameter to post.