Do you want more intake duration than exhaust duration? I know on a blower motor you want more exhaust duration... Someone help.

 

stock heads?? LS6 intake?? Headers or manifolds??

Need more info for now...

 

Stock heads, with mac mids to catless y and hooker catback. Ls6 intake also.

 

more exhaust duration helps with nitrous as well.

There are pros and cons to both.

for instance, I have the TR230 (230/224). I wasnt setup for the max of this cam because i had a very restictive exhaust system at the time, which was eating my power. because the exhaust duaration is less, this cam likes a very free flowing exhaust system to get the gases out quickly..if that helps