Why are our mph so different?
Why are our mph so different? my best friend has a 5 speed mustang weighing in at 3600lbs with him in it. He is running 12.7's @ 110 (best time ever) and dynoed at about 330rwhp.
The previous owner of my a4 / 3500 stall / tr224 cam WS6 'Vert dynoed at around 328rwhp and went 12.7 @ 105 (keep in mind this is with a da of 2000 - but even at 0 it should only be 107). Why such the huge different in mph?
The previous owner of my a4 / 3500 stall / tr224 cam WS6 'Vert dynoed at around 328rwhp and went 12.7 @ 105 (keep in mind this is with a da of 2000 - but even at 0 it should only be 107). Why such the huge different in mph?
your car seems to be down on power to be honest, also he has a five speed, manual transmission always trap alot higher than autos, but autos run better time so its give and take...
The MPH difference has to do with the Manual vs. Auto comparison you are doing, and nothing else! His T5 is directly linked to his drivetrain, so he has no loses in the drivetrain. Your auto will always MPH lower then a similar ET manual car. What were the 60' times for both.
... and there you go, it is due to the fact your are an auto and he is a manual. Manuals can put down more power to the ground more efficiently than an auto, which means a higher MPH. The auto will always ET better then the manual due to the torque multiplication of the stall converter.
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Originally Posted by nomorews6
wow very interesting ... i had no idea it could vary like that! is there any mph different between stock converter w/same power as a car with a bigger stall?
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In my experience with different transmissions in the same car with the same engine combo, I ran quicker (though not by much) in et and higer mph with the 5 speed manual transmission than the TH350. But then again, I can shift and there is always the factors of launch rpm and torque convertor selection. I used 2800 stall with the auto and left at 6000 rpm with the stick shift. If I had a more optomal converter like 4000 stall, the resulting et may have differed. Bottom line, the stick shift will always mph higher, but it's he who gets to the big end first who wins!
BTW: My old man won all of his races with a Glide!
Henry
BTW: My old man won all of his races with a Glide!
Henry
Last edited by Vintage Iron55; Dec 8, 2006 at 10:45 AM.