Exhaust design theory discusion.
Exhaust design theory discusion.
(OP)
If equal length primary pipes are worked out to a be 30" to give max torque at 3000rpm would it make a difference if instead of one pipe per cylinder i used one pipe per exhaust port which on this lump being 4 valves per cylinder would give me two pipes per cylinder.
Note: base replys on volume of primary pipes being equal whether single and double.
Note: base replys on volume of primary pipes being equal whether single and double.





RE: Exhaust design theory discusion.
Not too many engines have entirely separate exhaust ports for each valve from the same cylinder.
RE: Exhaust design theory discusion.
Looking at having the internal surfaces ceramic coated to help with the heat loss.
The two pipes per cylinder idea is because im fighting very tight confinds and the larger diameter pipes would need a transition length from an ovel, re the twin exhaust ports per cylinder to the round profile before the radius can be formed. That adds up to to much distance from the head face to the engine bay bullkhead.
One other thougth re the twin pipes per cylinder and tuned lengths. If the two pipes from the cylinders were aranged in say one at 30" and one at 20" and this was done across all cylinders would the effect be to spread the tuned point all beit to a smaller level or to cancell it out.
Please discuss... :)
RE: Exhaust design theory discusion.
A majority of high performance single cylinder motorcycle engines have separate ports and separate head pipes. These often converge into a single pipe about midway between the cylinder head and muffler.
RE: Exhaust design theory discusion.
RE: Exhaust design theory discusion.