LLADNAR

don't bag too much hes probably just seen Fast and Furious too much. hell if they can thoretically run 10s in those piles of **** a v-6 mustang should too right?

and based on those theories of logic my crap pile 88 should be kickin John Forces ***


i am just playin by the way in case anyone is sensetive to what i said

VertStangGT86

you can run 10's in a 6 if it's set up right it's just gonna take a lot of work. That movie has some serious problems like how fast they show the speedos going up in the beginning of the movie. But you can get those cars to go that fast, it's just done in different ways, a lot of electronic tuning and power adders. There are four bangers out there that do that entirely on engine. Roundman's right though, you're gonna need all that other stuff even if you get the power you need, that's something a lot of people forget about and it can cost just as much as the engine components.

EmptyEvergreen

three seven threes in a five speed four tens in an automatic is the first rule of the mustang club

e40water

well youre not going to get good gas mileage with 4.10's the gearing is basically good for racing, 3.55 or 3.73 is youre best bet, I had 4.10's in my 93 5.0L, I took them out and put in 3.73's

VertStangGT86

He's also got a new one that has different ratios to start with and 4.10's will still have less of a difference on his then 3.73's will on a 5.0.

Vert_Lover

Digging back to an old topic I know... sorry... where do the 3.90's I've seen mentioned a few times fall in... are they the happy medium between the 3.73's and 4.10's, do they lean too far one way... or did I miss something and they're just a different beast all together?

RollinThunder

they lean more towards 4.10's if ur lookin at 3.90's dont waste ur time get the 4.10's ...its just like the 3.55's lean more towards the 3.73's theres not much differance at all

roundman

Don't believe you can even get 3.90 gears for an 8.8 Ford rear end, so your question is a moot one. The bottom line on gears is just the ability to do some simple math and calculate engine rpms versus overall drivetrain gear ratio to decide which rear end gears are the best fit for your particular situation. for example, let's assume you have a 26" diameter tire on the rear wheels, the circumference of this tire is 6.807 ft. 5,280 ft/mile divided by tire circumference of 6.807 feet says this tire will make 775.67 revolutions to travel 1 mile in distance. to keep this simple, let's say you are driving 60 mph, then this tire is turning 775.67 rpms. if you have a 3.00:1 rear end gear ratio, then the driveshaft must be turning at 775.67 x 3 = 2,327 rpms. if your tranny is in the 1:1 gear, then the engine is also turning 2,327 rpm. if you are in an overdrive gear, let's say .85:1, then the engine speed is reduced to 1,978 rpm (.85x2327). If you were to change the rear end ratio to 2.73:1, then the engine would run even slower at 1,800 rpm in overdrive at 60 mph. (775.67x2.73x.85=1,800) this would save gas for you and let the car reach a higher top end speed before the engine reaches its redline speed, but it would also mean the car would be slower to accelerate than the car would with the 3.00 gears. now change the rear end gear to a 4.10:1 ratio and do the same math. the engine speed now at 60 mph in overdrive would be 2,703 rpm vs the 1,978 rpm with the 3.00 gear, an increase of 725 rpm or a 36.6% increase over the 3.00 gear. the 4.10 gear would have a negative effect on the gas mileage since the engine is running 36% faster, but the car would accelerate from a start much better as the 4.10 gear makes the engine rev up higher in its powerband to run the same road speed but the car would also have a lower top end speed when the engine is at redline rpm.
Grossly oversimplified, if you want the best mileage and top end speed but aren't too worried about acceleration, go with the lower numerical gear ratios like 2.73 or 3.08; if you want quicker acceleration and aren't that worried about top end speed and mileage, go with the higher numerical gear ratios like 3.55 or 4.10. The choice is up to you!
BTW, with my '88 Stang AOD racer with a 4.57 rear gear and 26" tall slicks, I cross the finish line in third gear (1:1) in the tranny at 6,100 rpm at about 96 mph after leaving the line with a 1.77 60' time!

NOS/MAN

I TRYED 4,10S IN COBRA WAS TO MUCH ON LONG TRIPS ,,HAPPIER WITH 3.73S YOU STILL CAN FEEL THR DIFF,,I STILL GET 27/28 ON HIGHWAY

horseshoeing

Leave it stock. If you want a fast car, get one that is easyer and cheaper to make it a fast car. Better yet, buy one that someone is tried of or needs the money.