Quote:
Originally Posted by DGthe3
It depends on how much the rpms dropoff each shift, but its probably going to be at or near redline.
For the sake of argument, lets say it drops by 1500 rpm every single time.
Shifting at 5900, based on the above dyno, you'd go from about 380 hp down to about 330 hp @ 4400. The curve is skewed slightly to the top end, so the overall average is going to be something like 360 to 365 hp.
Now, if you wait and shifted at 6250 rpm it would be going from about 355 hp to pretty much the same 355 hp at 4750. The kinda flat power peak is going to be in the middle of that, so I'd estimate the average to be around 370-375. Just slightly more than shifting at peak power. Not enough to make a big difference, but more power is more power.
I drew some lines on the dyno chart from above to help illustrate my point. The horizontal line is the approximate average power being made between the vertical lines (the rpm you shift at & what the engine goes down to)
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Thanks man! Using a 1500 rpm drop off shifting at redline I will be more into the powerband vs shifting before redline after each shift.
Makes sense.. trying to stay at the high powerband level is a critical factor.. I see why tuners alter shift points, etc.
