General Fox question

**Cam99** · 04-19-2007, 12:19 AM

I don't know what forum to post this in so... Trying to guesstimate what gears are in the notch I just got (without actually checking!). 93 5.0 with 5 speed. Stock size 16" tires on ponys. At 70 mph I was running about 1900 RPM give or take. Any guess

**383taman** · 04-19-2007, 12:24 AM

Most came with 3.27 at best i think rpm and mph seems right.

**Pure Stock** · 04-19-2007, 01:01 AM

Originally Posted by Cam99

I don't know what forum to post this in so... Trying to guesstimate what gears are in the notch I just got (without actually checking!). 93 5.0 with 5 speed. Stock size 16" tires on ponys. At 70 mph I was running about 1900 RPM give or take. Any guess

If your running a 225/55/16 tire, they are close to being 25 3/4" tall. Using this formula: rear gear x 336 x trans ratio gear (5th in your example) x speed and then dividing that by tire height we arrive at a 3.08 gear.

Here's what it looks like... 3.08 x 336 x .68 x 70 divided by 25.75" =1913 rpm

Tires by different manufacturers will vary slightly in height and the calculator is intended only as an approximate guide.

**383taman** · 04-19-2007, 01:05 AM

Yup that the other gear ratio they came with.

Originally Posted by Pure Stock

If your running a 225/55/16 tire, they are close to being 25 3/4" tall. Using this formula: rear gear x 336 x trans ratio gear (5th in your example) x speed and then dividing that by tire height we arrive at a 3.08 gear.

Here's what it looks like... 3.08 x 336 x .68 x 70 divided by 25.75" =1913 rpm

**Troll** · 04-19-2007, 01:05 AM

what are you plans Cam? Post up some pics. I'll have to come by and take a look at that one some day.

**White5.0** · 04-19-2007, 01:06 AM

Originally Posted by Pure Stock

If your running a 225/55/16 tire, they are close to being 25 3/4" tall. Using this formula: rear gear x 336 x trans ratio gear (5th in your example) x speed and then dividing that by tire height we arrive at a 3.08 gear.

Here's what it looks like... 3.08 x 336 x .68 x 70 divided by 25.75" =1913 rpm

thats some crazy math! lol

**383taman** · 04-19-2007, 01:11 AM

I agree but it right.

Originally Posted by White5.0

thats some crazy math! lol

**6987stangs** · 04-19-2007, 01:12 AM

Originally Posted by White5.0

thats some crazy math! lol

I AGREE. YOU CAN ALSO CHECK THE TAG ON THE DIFF IT HAVE 3.08 LL. THE LL I WAS TOLD MEANS IT HAS A POSI

**Cam99** · 04-19-2007, 07:10 AM

Originally Posted by Pure Stock

If your running a 225/55/16 tire, they are close to being 25 3/4" tall. Using this formula: rear gear x 336 x trans ratio gear (5th in your example) x speed and then dividing that by tire height we arrive at a 3.08 gear.

Here's what it looks like... 3.08 x 336 x .68 x 70 divided by 25.75" =1913 rpm

Tires by different manufacturers will vary slightly in height and the calculator is intended only as an approximate guide.

WOW. They felt like the stockers which is going to have to change. Thanks for the info!

**Cam99** · 04-19-2007, 07:12 AM

Originally Posted by Troll

what are you plans Cam? Post up some pics. I'll have to come by and take a look at that one some day.

It's going to be mostly a strip car, but still streetable. I'm going to de-mod the mach a little and just leave it as a cruiser. I'll get some pics up shortly. Stop out anytime, I wouldn't mind seeing your new ride as well

**Troll** · 04-19-2007, 08:22 AM

Originally Posted by Cam99

It's going to be mostly a strip car, but still streetable. I'm going to de-mod the mach a little and just leave it as a cruiser. I'll get some pics up shortly. Stop out anytime, I wouldn't mind seeing your new ride as well

I might have a set of 3.27 soon. You'll probably want something bigger than that, though ??? !!! LMK.

**Cam99** · 04-19-2007, 08:25 AM

Originally Posted by Troll

I might have a set of 3.27 soon. You'll probably want something bigger than that, though ??? !!! LMK.

Yeah I'm probably going with 3.55 or 3.73 depending on what route I take with the car. Thanks though.

**9002stang** · 04-19-2007, 09:03 AM

Hey good luck with the project! Thats a great project car!

**scott5** · 04-19-2007, 12:14 PM

can never go wrong with 3.73s for all around driving use

**coralcoupe1993** · 04-19-2007, 12:23 PM

Originally Posted by Cam99

Yeah I'm probably going with 3.55 or 3.73 depending on what route I take with the car. Thanks though.

Do This:
4.30s Put it on a diet, slicks, launch at 6k.

**gmkillr** · 04-19-2007, 12:41 PM

Originally Posted by coralcoupe1993

Do This:
4.30s Put it on a diet, slicks, launch at 6k.

X2!!!

**Troll** · 04-19-2007, 12:45 PM

Originally Posted by coralcoupe1993

Do This:
4.30s Put it on a diet, slicks, launch at 6k.

then call Summit for some new axles and lca's.

**Cam99** · 04-19-2007, 01:03 PM

Originally Posted by Troll

then call Summit for some new axles and lca's.

LMAO. troof. I am thinking 31 splines and 3.73's at this point....but that is subject to change

**coralcoupe1993** · 04-19-2007, 01:33 PM

Originally Posted by Cam99

LMAO. troof. I am thinking 31 splines and 3.73's at this point....but that is subject to change

Oh yea. I always ditch the stock axels when mods come into play!

**Shaggy** · 04-19-2007, 03:51 PM

Originally Posted by Cam99

I don't know what forum to post this in so... Trying to guesstimate what gears are in the notch I just got (without actually checking!). 93 5.0 with 5 speed. Stock size 16" tires on ponys. At 70 mph I was running about 1900 RPM give or take. Any guess

Sound like yours???
Just guessing. these is what mine was
3.08s.

All at 6200rpms
1st : 43mph
2nd : 73mph
3rd : 91mph
4th : 130mph
5th : ?