You're ignoring one very important factor, merge angle. That is the reason a ramhorn outperforms other designs. It's the only manifold design I've made so far that pulls a vacumm (exhaust scavenging) on the non firing runners. Any other manifold does the opposite. Packaging, makes it impossible to make a low merge angle manifold without introducing bends, many of them, so for best flow, low merge angle is more important than the amount of bends. And as mentioned earlier in the thread, just take a look as some of the top performing engines in any type of racing. They can't all be wrong.

As far as spool, shorter runners=faster spool. Full race, with their extensive experience in manifold building, agrees, even though saying otherwise would help their sales. They have no reason to lie. Sorry Bob, but I think you're wrong on that one. There may be other factors contributing to your fast spool, if it is indeed faster with the same displacement.

A low angle merge manifold with the shortest possible runners is the ticket. Tim, your designs look awesome. Have you started working on one yet?

 

Hopefully Tim starts working on one for me sometime at the beginning on March.

 

So. Will your car be ready for spring dyno day?

 

Thanks buddy. Besides the cleaned up CAD models I haven't done anything more.

 

Only if yours is.