How to determine a safe red-line?
None of these are quite correct.
First, your shift points are WHERE the previous gear and next gear curves CROSS. You can easily determine this with some sort of G meter such as a G-tech, or a dyno run. You don't need to run all gears, just plot one, if that's all the road you have, and then calculate the other curves off of transmission ratio and take into account converter slip.
But those shift points DO NOT MEAN that just because your cam / piston/ etc combo makes power at 8800 RPM, that the rest of the engine is capable. Is the bottom end gonna hang in there? Valve springs? You need to do some serious thinking. If you have say, a strocker 318 with worn out old valve springs and "somebody" slapped a Great Big cam in there, then prolly not.........................
It matters not whether you plot HP, torque, acceleration G's or against RPM or MPH
None of these are quite correct.
First, your shift points are WHERE the previous gear and next gear curves CROSS. You can easily determine this with some sort of G meter such as a G-tech, or a dyno run. You don't need to run all gears, just plot one, if that's all the road you have, and then calculate the other curves off of transmission ratio and take into account converter slip.
But those shift points DO NOT MEAN that just because your cam / piston/ etc combo makes power at 8800 RPM, that the rest of the engine is capable. Is the bottom end gonna hang in there? Valve springs? You need to do some serious thinking. If you have say, a strocker 318 with worn out old valve springs and "somebody" slapped a Great Big cam in there, then prolly not.........................
It matters not whether you plot HP, torque, acceleration G's or against RPM or MPH