Alright, with the 215 65 16 tires and 4000 in 5th with the 2.73's....the estimated speed is 173mph.
can you calculate my 4000rpm in 5th gear with 2:73 gears, at 60mph I'm dead on 1500rpm (my tires are taller than stock).Car would not slow down in 5th, I wasn't flooring it, I know I could have taken it further too... I guess I have more power than a stock Mustang but the car didn't feel all too bad at those speeds, just real light. Also note that my car weighs less than 2800lbs.
Ive had my 86 speedo wrapped around to the 15 before as well.
A stock 86 speedo won't wrap itself around like that. The needle stops once it hits the bottom, center of the speedo. I've done it more times than I can count.
Alright, with the 215 65 16 tires and 4000 in 5th with the 2.73's....the estimated speed is 173mph.To funny...it just goes to show how much things can be out of wack.
That works out to between 105 to 115 mph.
Very true. One must remember that aerodynamic drag increases by the square of speed, and the power needed to overcome it increases BY THE CUBE!
If you want to double your speed, you need EIGHT TIMES as much power to do it.
Using your 110 to 145 mph example:
If a vehicle needed 100hp to reach, 110 mph, it would actually need 129 MORE horsepower (229 total) just to gain that 35 mph! It would take 800hp to get it up to 220mph.
Bingo.
After a certain point the HP required to gain 10MPH is significantly greater than the HP required for the previous 10MPH. It grows exponentially.
A fox is limited to approx 145 due to areodynamics and HP limitations. Increase your HP and you can go faster, the t-5 is geared for it. You just need power to overcome the sever drag.
That's why i always laugh when some kid in some 200HP car claims he has done 160MPH in it. Breaking 150MPH requires approximately 300-350HP. Even my 260HP Gt has struggled to hit 150MPH in that one crazy time i had a chance to try it.
FWIW, the Lincoln Mark VIII held the production car land speed record with a completely stock DOHC 4.6L at one time. Given, they modified the car, itself, by adding panels to the underbody and using really skinny tires/rims with those smoothie hubcaps to reduce drag significantly, but they got some pretty amazing speeds outta that thing with just a stock DOHC 4.6L...
Finally some one who agrees sort of..
It would take roughly 660 hp to get a fox-body up to 200mph. Obviously there are cars that hit that speed with less hp than that (the Ford GT -- 205mph with 500 hp). The coefficient of drag plays a huge part in the equation. There are cars that have gained 10mph in top speed with just a body redesign that lowered the Cd. As far a drag goes, the fox-body is pretty much a brick compared to the GT.Bingo.
After a certain point the HP required to gain 10MPH is significantly greater than the HP required for the previous 10MPH. It grows exponentially.
A fox is limited to approx 145 due to areodynamics and HP limitations. Increase your HP and you can go faster, the t-5 is geared for it. You just need power to overcome the sever drag.
That's why i always laugh when some kid in some 200HP car claims he has done 160MPH in it. Breaking 150MPH requires approximately 300-350HP. Even my 260HP Gt has struggled to hit 150MPH in that one crazy time i had a chance to try it.
Ive maxed out overdrive with 275/50/15's and 4.10 gears about 6500 rpms. My suspension is nowhere near stock and I have alot more power then stock. My speedo was showign well past 140 but Im not sure how accurate it was. What does this work out to
Again...so you think. Even with your mods, you are no where near the power level required to run at those speeds. Using a simple gear calculator, 6500rpm with those tires and a t-5 in 5th is an approximate 179 mph.
thats still was with the stock tach. Maybe I need to get some speedo pics or maybe a vid right?
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