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Old 06-19-2010, 03:20 PM   #15 (permalink)
silver04rollas
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I ran a 14.72 with my XRS on stock 2650 lbs weight that makes piddly amount of torque down low(with little modifications such as intake and exhaust, lighter weight wider wheels etc.) Many cars with a lot more torque (albeit much heavier) cannot come close to this time.

Simply, you want to make sure you can get off the line fast enough to not get bogged down while if you give too much revs, you might end up spinning like crazy and not go anywhere. It is a delicate balance that only you can find out through experimentation since every car has a different torque band (some make lots down low and plummet as the revs climb while others can make piddly amounts down low and then makes lots on top etc.) .

In my current state, the car puts down around 140 ft-lbs of torque at a lofty 6800 rpm and well over 190 HP + @ 8000 rpm. In fact, the car has very little torque below 4000 rpm. However, once the needle swings past 6000 rpm the car pulls insanely hard uptill 8400 rpm and never lets off after that gear change to gear change.

In short, gearing, the way your torque builds over the rpm (whether it holds flat or falls on its face as the rpms climb etc.) all play a major factor.

The trick was I launched from 4000 rpm as the car tried to hook up, the revs fell to 3200 - 3300 rpm as the tires were struggling to find traction and then as soon as the car hooked up, the needle zoomed up to 8400 rpm. Having such a wider rpm band and short gearing allows a lot of torque multiplication so I needed to find the perfect spot where I do not spin without going anywhere while not enough revs would make me bog down badly due to lack of torque down low.

Hope that helps.
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Last edited by silver04rollas; 06-19-2010 at 03:24 PM.
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