Is there a formula or way to calculate the optimum bore size for an exhaust?
All I seem to turn up are best guesses and theories?
1.4 = 1 inch
2.0 = 1.5 inches
3.0 = 2 inches
4.0 = 3 inches or twin 1.5 inches
Any comments or suggestions would be welcome. Isn't power output a better guage than the engine size?
All I seem to turn up are best guesses and theories?
1.4 = 1 inch
2.0 = 1.5 inches
3.0 = 2 inches
4.0 = 3 inches or twin 1.5 inches
Any comments or suggestions would be welcome. Isn't power output a better guage than the engine size?