nomorews6

iTrader: (7)

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?

Magnet

iTrader: (36)

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...

nomorews6

iTrader: (7)

328rwhp is down with just the 224 cam lid and muffler through a 3500 stall? I am not sure if it is corrected times or not...

WS6Drop

iTrader: (10)

Your car is a bit heavier as well. You would make a lot more to the wheels with headers and a ls6 intake. Maybe the dyno pull was done unlocked, makes a big difference.

12secSS

iTrader: (30)

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.

nomorews6

iTrader: (7)

we were both 1.7's

12secSS

iTrader: (30)

... 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.

nomorews6

iTrader: (7)

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?

12secSS

iTrader: (30)

Depending on the efficiency of the converter, the MPH difference would be from 0 to as much as 4 MPH over a stock TC. BUT your ET will drastically reduce, any where from .5 second reduction to as much as a full second (1.xx). I experienced .88 reduction with a Vig3200 over a stock TC, and my MPH went up 2 MPH.

Vintage Iron55

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