I was just wondering what the differences were other than LSA? I know that overlap has to do something with it, and the large duration split to force in as much air into the combustion chambers. But let say if thats the case then why do people run say the c306 and gm847 cam for N/A applications and yet i dont see them on blower setups. or vice versa, i dont see n/a guys using blower cams for their setups. im sure there's a really good answer, i just need some clarification, so school me on this.

 

This would be a very basic start to the post but basically on NA setups you want the outgoing exhaust pulse to help draw in the fresh air fuel charge. Use that same cam designed too allow that on a boosted application and you will blow boost right out the exhaust. There will be overlap on a boosted spec cam just not as much as an NA one.

 

Hmmm..... I thought a blower motor just raised the intake port pressure higher than it already was.... it's the same principal as a NA motor but the atmosphere the intake port sees is higher, that's all.

The main difference in blower cams to NA cams is the valve events and more exhaust duration... it's not the overlap and LSA.

Bret