Just always been my understanding that an engine with manifolds responded better to a wide LSA. I wasn't arguing the point...Lord knows you got more brains in that area than I do.....I was merely asking the whys and wherefores.
Understood. I wasn't trying to argue either. I was wondering if you have seen on certain engines they respond better with certain cam characteristics. I doubt I have more brains than you...I can't remember anything anymore!
I have to write everything down or I plain forget. Sucks.
But to dive into it a little more...without a tuned exhaust header, most engines I've seen run well typically have tight lca's and a split anywhere from 6° to as much as 18°. I only split the lobes alot if it's an engine that needs rpm....340's get it naturally so no need to split it huge IMO.
Another thing is engines with manifolds seem to like more ex. lift than an engine with a header.
This is from my experience only, and may be different than others so take it with a grain of salt!
Brian