Location: 2007 Nat'l Corvette Challenge 11.50 index Champ. New Jersey
I'm thinking you should shift as close to redline as possible, without hitting the rev limiter.
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I'm thinking you should shift as close to redline as possible, without hitting the rev limiter.
That works good for me in C5's and C6's.
It is not just the HP at the RPM in the gear you are shifting out of, you also need to consider what RPM you will be at when you engage the higher gear.
The closer to 6500 you get without hitting the rev limiter means you will be that much higher rpm after you shift.
I'm no expert but I don't think you just want to forego that last 700+ RPMs. As was mentioned, you want your RPMs up for your next gear and I would think you should still have some pull all the way to your shiftpoint.
My engine redlines at 6800 RPMs....I've been trying to shift at about 6500-6600 RPMs. You certainly don't want to hit the rev limiter but I think you want to 'approach' it.
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Indeed you want to pull as long as possible but, with a 6.5k RPM redline and no shift light, you should likely target say 6.2k-6.3k RPM at least for the 1-2 shift.
There are two ways to determine optimal shift points.
(1) experimentation
(2) calculation
On a stock LS1/2/6/7, owners have been experimenting since CY 1996 and generally found that shifting right before the limiter brought best acceleration.
You can do the calculation of ideal shift points if you're curious or your car has significant mods. To do this you need to know your tranny ratios, your rwhp at 100 rpm increments between say 4400 rpm and the limiter setting (from a dyno run output in plain values rather than plotted on a curve).
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Question Regarding Shifting
That works good for me in C5's and C6's.
