whens the best time to shift while running the 1/4? what rpm do you guys launch from?
best time to shift
so slow and no show
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whens the best time to shift while running the 1/4? what rpm do you guys launch from?
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45 Posts
i'm fairly new to the drag racing scene and when i went to clock my car i kept shifting right before the rev limiter. my best is a 16.7 which i think is slow.
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<blockquote><font size="1" face="Verdana, Arial">quote:</font><hr>Originally posted by ztsoholic:
I remember reading something before about shifting around 6500 for first gear because it goes so quick, but then 6000 for the rest for your best time...<hr></blockquote>
ummm
mine only goes to 6250.
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I remember reading something before about shifting around 6500 for first gear because it goes so quick, but then 6000 for the rest for your best time...<hr></blockquote>
ummm
mine only goes to 6250.
actually stock limit is 6750rpm, your tach mine just be off a bit, do the digi readout and check that, its more accurate. Yeah, get 1st gear up to about 6200-6500rpm(if stock engine or slight mods that dont affect curve much) and the rest shift at 5900-6000rpm.
<blockquote><font size="1" face="Verdana, Arial">quote:</font><hr>Originally posted by YELO-ZX3:
i did a research here before and a guy has actually calculated peak power with gear ratio
and the result is
1st to 2nd --> 6750rpm
2nd to 3rd --> 6000rpm
3rd to 4th --> 6500rpm
and he didn't calculate the 4th to 5th<hr></blockquote>
The proof is in the pudding. These shifts points on a stock ZX3 will slow you down.
Take your car to the track and experiment with shift points. The most common mistake people make is shifting too high. The stock power peak is only 5300 on the Zetec. Ideal shift points (from hundreds of runs down the drag strip) are 300-400 rpm above the power peak. All you have to do is look at the stock power curve and see that it falls off like a rock above 5300. The car is not accelerating when you are on the down side of the power curve.
i did a research here before and a guy has actually calculated peak power with gear ratio
and the result is
1st to 2nd --> 6750rpm
2nd to 3rd --> 6000rpm
3rd to 4th --> 6500rpm
and he didn't calculate the 4th to 5th<hr></blockquote>
The proof is in the pudding. These shifts points on a stock ZX3 will slow you down.
Take your car to the track and experiment with shift points. The most common mistake people make is shifting too high. The stock power peak is only 5300 on the Zetec. Ideal shift points (from hundreds of runs down the drag strip) are 300-400 rpm above the power peak. All you have to do is look at the stock power curve and see that it falls off like a rock above 5300. The car is not accelerating when you are on the down side of the power curve.
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