Hi, spent the weekend working on my first RF build. It has turned into a bigger project than expected! Perhaps it has something to do with a dozen friends with there own ideas, and about 15 cases of beer? Either way, I'm trying to follow the formula that DaveOmak sent. Which has gotten me to where I'm at now. But I'm having issues with figuring the size of the exhaust. Any help would be appreciated, as long as it isn't from any of my friends that "know it all!" My cc is 97716 cu.in. Thanks in advance!!!