BB and SB roller cams

The rule on cam duration is: The higher the CFM of head flow the less duration is required to make the equivalent power. It is all about filling the cylinders

So I have always used big head CFM with big solid roller lobes using steep ramps and lots of lift. Then i retain streetability with less duration.

434 ci Motown SB Endurance road racing lobes 248/250 110 .685/.714 I originally built it with an off the shelf Comp Cams SR extreme 242/248 110 and it just didn't have enough bark for me
 
gkull said:
The rule on cam duration is: The higher the CFM of head flow the less duration is required to make the equivalent power. It is all about filling the cylinders

So I have always used big head CFM with big solid roller lobes using steep ramps and lots of lift. Then i retain streetability with less duration.

434 ci Motown SB Endurance road racing lobes 248/250 110 .685/.714 I originally built it with an off the shelf Comp Cams SR extreme 242/248 110 and it just didn't have enough bark for me
Click to expand...

Big Dog -- Big Bark that works for me.:bounce:
 
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