I think Greg nailed it -- one other thing to remember is that a lean misfire in the cylinder can result in a backfire in the exhaust too. If it won't fire in the cylinder because it is too lean, the charge may still burn in the exhaust and result in a rich smelling exhaust. I think this is...
Built this X pipe system for my 68 Camaro. The sound is higher pitched than with straight duals and slightly quieter.
I have never noticed a power gain or significant difference between H pipe, X pipe or straight dauls -- but I do like the fact that it tends to cut down the noise...
Interesting discussion. Part throttle certainly has less cylinder pressure due to being throttled, but there is more that changes than just cylinder pressure at part throttle.
For one, most engines increase ignition advance significantly and lean the mixture at cruise (like 50+ degrees)...
Maybe I am a little "turbo naive", but how would that help efficiency at part throttle? (not that part throttle is important to me LOL) It would solve the WOT problem, especially if you could measure octane prior to combustion and be a little more proactive with the waste gate and spark curve...
I think maybe maybe dcasto was referring to compression ratio ??
In my opinion increasing compression ratio is the most important way to take advantage of ethanol as a fuel and would have way more effect on efficiency then spark management (unless you are pulling timing out for gasoline so it...
Interesting thread, hope you guys don't mind a newbe commenting on this.
I have a carbureted 68 Camaro that I recently converted to E85 and thought I would offer some comment from the "practical experience side" of this discussion.
My engine is a 410" small block Chevy and has a static...
