Turbo six on a Budget

my68barracuda said
, difference is NA uses the overlap period to enhance the intake charge. As the exhaust is leaving the chamber through the open exhaust valve it makes a low pressure area that sucks the intake charge in through the open intake valve. With boost overlap can have the charge blowing into the open intake and out the open exhaust. So the overlap on a boosted motor, particularly a turbo motor is short.

While I tend to agree with your statement, as with all things there are many factors involved. How bout I ask you this question to validate my point. How much overlap do you think a camshaft cut for a twin turbo 500 inch promod on methanol has? And do you think the overlap for a slant 6 with 8:1 compression and 7psi on gasoline will be the same?