Optimal launch?
Registered User
Joined: Jan 2001
Posts: 4,282
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From: Melbourne
It totally depends on the conditions. You need to take all this into account:
- weather
- temperature
- how new/warm the rear tyres are.
- what kind of surface you're on and how much grip it has.
- how much have you got loaded in your car
There's even more variances, but look at it this way. When it was warm here (summer/spring) - I needed 7k+ revs in order to keep the wheels spinning though the pre-vtec revs (bellow 6k). 7.5k were the optimal revs. On the other hand, now it's winter and on a dry road, I can break the rear wheels with about 3k - 4k revs. I've even done it on one cold night with about 2.5k revs.
So as you can see, you really need to try it for yourlef as there's way too many variables. Though, you're better starting wiht higher revs than loower as you're better spinning the wheels too much than shocking the drive train.
- weather
- temperature
- how new/warm the rear tyres are.
- what kind of surface you're on and how much grip it has.
- how much have you got loaded in your car
There's even more variances, but look at it this way. When it was warm here (summer/spring) - I needed 7k+ revs in order to keep the wheels spinning though the pre-vtec revs (bellow 6k). 7.5k were the optimal revs. On the other hand, now it's winter and on a dry road, I can break the rear wheels with about 3k - 4k revs. I've even done it on one cold night with about 2.5k revs.
So as you can see, you really need to try it for yourlef as there's way too many variables. Though, you're better starting wiht higher revs than loower as you're better spinning the wheels too much than shocking the drive train.
Registered User
Joined: Oct 2000
Posts: 1,529
Likes: 0
From: Chicago
7.5K is a little high for me. I races every weekend, the usual launch rpm are 6200-6600 rpm range. Just try it out. If it bog when the tires stop spinning try to launch it a little higher next time. If you spins left/right lower the launch rpm.
Registered User
Joined: Oct 2000
Posts: 2,125
Likes: 0
From: Montreal
Originally posted by DavidM
It totally depends on the conditions. You need to take all this into account:
- weather
- temperature
- how new/warm the rear tyres are.
- what kind of surface you're on and how much grip it has.
- how much have you got loaded in your car
There's even more variances, but look at it this way. When it was warm here (summer/spring) - I needed 7k+ revs in order to keep the wheels spinning though the pre-vtec revs (bellow 6k). 7.5k were the optimal revs. On the other hand, now it's winter and on a dry road, I can break the rear wheels with about 3k - 4k revs. I've even done it on one cold night with about 2.5k revs.
So as you can see, you really need to try it for yourlef as there's way too many variables. Though, you're better starting wiht higher revs than loower as you're better spinning the wheels too much than shocking the drive train.
It totally depends on the conditions. You need to take all this into account:
- weather
- temperature
- how new/warm the rear tyres are.
- what kind of surface you're on and how much grip it has.
- how much have you got loaded in your car
There's even more variances, but look at it this way. When it was warm here (summer/spring) - I needed 7k+ revs in order to keep the wheels spinning though the pre-vtec revs (bellow 6k). 7.5k were the optimal revs. On the other hand, now it's winter and on a dry road, I can break the rear wheels with about 3k - 4k revs. I've even done it on one cold night with about 2.5k revs.
So as you can see, you really need to try it for yourlef as there's way too many variables. Though, you're better starting wiht higher revs than loower as you're better spinning the wheels too much than shocking the drive train.
Joined: Feb 2001
Posts: 4,061
Likes: 363
From: Redondo Beach
Don't forget that SOME wheelspin is needed for a good ET, just not so much that you end up fishtailing or even standing still. They should spin for maybe half a second to a second or so before really hooking up. So the "best" rpm to taunch at is the one that produces that amount of wheelspin, and will vary depending on the conditions. Experiment a little, and remember Sev's advice: tire pressure, tire pressure, tire pressure.
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