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post #1 of 12 Old 09-12-2009, 12:43 PM Thread Starter
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Optimal Shift Point

What is everybody shifting out at at the track? Anyone have an idea of the optimum shift point on the LS3 powered cars? Before some wiseass says redline, it's not always best to bring the engine up to redline when shifting. For example, I know 2003 SVT Mustangs red line at 6,500 RPM. Most guys shift out at about 5,800 RPM. They say it makes a lot of difference in their times. Some say the difference is only a nose, but I know I would rather be a nose ahead then door to door!

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post #2 of 12 Old 09-12-2009, 09:58 PM
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after the tune i shift at 6100, thats the peak the dyno showed, brfore the tune it peaked at 5500
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post #3 of 12 Old 09-12-2009, 11:18 PM
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my last car I just used my G-Tech and got graph of G's accelerating over rpms.. did couple of gears.. and see difference between how hard car is accelerating at 6200 rpms compared to if I shifted earlier into next gear what Gs of accelerating would be at 4400rpms if I shifted early..

this doesnt take into the acct that u might geta jump from ur high tq point at lower rpm shift from a power shift..

though that car dyno was pretty flat.. I tried shifting from 5600 to 6200 got about same ET from 5800 to 6200..

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post #4 of 12 Old 09-12-2009, 11:20 PM
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Question...
if u dont have the G-Tech. what if u get ur dyno then calculate power from graph by multiplying tranny and differential gear ratio accross rpm band seeing different power in different gears..

hopefully someone understands what Im trying to say..

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post #5 of 12 Old 09-13-2009, 08:05 AM
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I would suggest shifting 100 rpm before your peak hp. This gives you the time to actually reach peak hp and not go over on rpms and have it fall on it's face.

The peak power remains the same as it is a constant for the most part. It does not change with your gear selection; to answer your question.

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post #6 of 12 Old 09-13-2009, 10:22 AM
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post #7 of 12 Old 09-13-2009, 08:17 PM
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Shift that LS3 at 6200-6500, one thing you dont want to do is bog down the next gear too low, shifting at 5800 will DEF do that, not good when your next to someone Driver Mod FTW

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post #8 of 12 Old 09-13-2009, 09:25 PM
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echo, echo, echo
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post #9 of 12 Old 09-13-2009, 09:40 PM
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what about the L99 with TapShifting??

is there a thread somewhere that I should take my automatic arse to??? What rpm's does one shift for competitive driving while using the tapshift??? Should it be any different than what I'm reading with your LS3's???

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post #10 of 12 Old 09-14-2009, 09:27 AM
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How are you launching the car...? I just bought a 2010 Camaro with a M6 tranny and I would hate to break a halfshaft or anything else on the car. I launch my 1999 camaro at around 5000 rpm but that car is a lot lighter and less expensive to fix if something brakes...

So my question is, at how many RPM are you launching your 2010 camaro?
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