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vortech supercharged 1992 fox mustang speedo only reads 140, pegs almost 2 inches under that in s...
From: blown309jtd
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11 comments
October 17, 2007
thanks for the help by the way
 
 
its a t-5 world class, slightly built, just recently actually, but same ratios. tires are 225/50/15s. before i had the cop hit me with radar for top speed, i had another cop do it at 35,45, and 55 mph. at 35 it was accurate within 1 or 2 mph, at 45, it was off by like 5, and 55 it was off by like 8. sais im goin faster than i am. like you said, i just need to get it recalibrated, but i dont have the money lately, so it dont bother me much. just kinda keeps me from getting tickets i guess...ironic, i just got one for the first time in the two years ive had the car
 
 
if anybody could give me a better guess to the top speed for both 3.55s or 3.73s, i would appreciate it just to know. im thinking they are 3.73s. like i said, when i was radared, the speedo was about an inch past 140, and i had it at around 5400 rpm, give or take a lil. this time it was almost 2 inches past, and was around 6200-6300, give or take. i was more watching the oil pressure, road, and fuel pressure, shifting, steering, and holding my phone all at once more than watching the rpms to give an exact number. but ya, if anyone has top speed numbers, please let me know, im sick of guessing.
 
 
honestly, im not sure if they are 3.73s or 3.55s . i bought the car with h/c/i, and since then, the motor and everything on it is completly diffrent, but im not sure what gear the guy had in it.i had my cop friend hit me radar a couple months ago, and i pulled the rpm to about 5400 or somewhere around that, and he said i got 141 mph. this time i brought it to about 6200, getting either braver or dumber, whichever one. and when i was radared, the speedo was about an inch past 140, give or take, so whatever the right speed is, your guess is as good as mine.