[sqidd]

You'll never be able to achieve the theoretical top end speed in the Mustang with any gear.

I can't pull top speed in my car with the 3.55. It's 192mph. I would need about 600hp to do that. Which is odd because that is how it's coming out of the garage in the spring........imagine that

My supposed top end with 4.10s and 295-45-18s is 192 mph.

Are you calculating the tire size to get the height of it? In most cases that is not very accurate. I just calculated it out and it's telling me your rear tires are 28.45" tall, which is a very tall tire for it's "size". I have 295/40-18's and my tires are 26.2" tall when you measure them with a tape.

I just ran the top speed of your car with 4.10's, 28.45" tall tires (it's all I have to work with) and a 6000rpm redline (I'm sure yours can rev higher though). I got 182.148mph as max speed. Which is pretty damn fast for 4.10's. If you do the calculation with a 27" tall tire you get 172.865mph which shows how much tire height effects the top speed of the car, or the calculation of it. Your car may actualy be able to do 172mph with 400+ at the wheels. It wouldn't exactly zip right up there though. You would need to be in it for a while.

There's not a chance my, or any other, S197 Mustang could do that without a rocket assist

The FR500C's were going 180mph plus on Daytonas banking the first race they were entered in a few years ago. And they are only running a 5.0L 4v which makes 440rwhp (I was standing next to one for an hour while it got mapped is the only reason I know how much power they make). The cars also had almost ZERO aero equipment on them too. They were stone stock 05 GT bodywork. I imagine they did a lot of work around the radiator and lower air inlets between the bumper and the bottom of the bumper cover. Getting just the right amount of air through the rad and deflecting the rest somewhere else does a ton for top speed. They also have these sweet little vortex generators on the trailing edge of the roof too.

[sqidd]

RE-Quote for STLwagon

My supposed top end with 4.10s and 295-45-18s is 192 mph.


Are you calculating the tire size to get the height of it? In most cases that is not very accurate. I just calculated it out and it's telling me your rear tires are 28.45" tall, which is a very tall tire for it's "size". I have 295/40-18's and my tires are 26.2" tall when you measure them with a tape.

I just ran the top speed of your car with 4.10's, 28.45" tall tires (it's all I have to work with) and a 6000rpm redline (I'm sure yours can rev higher though). I got 182.148mph as max speed. Which is pretty damn fast for 4.10's. If you do the calculation with a 27" tall tire you get 172.865mph which shows how much tire height effects the top speed of the car, or the calculation of it. Your car may actualy be able to do 172mph with 400+ at the wheels. It wouldn't exactly zip right up there though. You would need to be in it for a while.

I just calculated you top speeds based on how high you may be able to rev the car:

Rear End Ratio 4.10:

6000rpm = 182.14
6250rpm = 189.74
6500rpm = 197.32
6750rpm = 204.92
7000rpm = 212.51
7500rpm = 227.69
8000rpm = 242.86

[StangAddiction]

I was thinking about a gear change also, but I don't have stock size tires. Is there a website or number figures for me to use to convert my present gear ratio before I purchase a new set of gears?

Thanks

[Steve Smiley]

Randys ring and pinion.com

[Punisher27]

BLAH! im getting confused! i got a '01 Mustang GT....took it to the tracks ran 14.5, :/ it' OK. i drive mainly in the city and im looking to go fast! a friend recommends the 3.73 but seriously doubt his reasoning Lol.

oh! im looking to go fast in the long run....so 3.73's or 4.10