[Jeff Chambers]

Stock rev limiter is set at 6250. The computer begins shutting the fuel pump on/off to drop fuel; not like MSD boxes that actually drop the spark. The rev limiter won't help at all for preventing mechanical over-rev; meaning that if he shifts from 4th to 1st at 90mph the engine's gonna spin to whatever RPM is necessary to match the mechanical gearing. Been there, done that, bent every valve and pushrod in the motor. The computer's rev limiter will help cut the engine off if he misses a shift and over-revs it between gears.

In terms of the best shift point, with your mods you'll just have to determine the best shift point through trial and error. I'm guessing that it'll be somewhere between 5400 and 5800. I've got a discussion on how to mathematically determine the optimum shift points based on dyno data on my website at http://crt-performance.com/shift_points.htm.