Flyer,

Do you mean, a larger camshaft takes the power band higher than what the blower can create boost?

 

Not really. The blower has limits as to what it can spin. If you start spinning the motor faster,. the blower spins faster.

Unrelated, but the blower will help wake up any dead spots in a cam.

 

thank you
--wo you changed your response

what was wrong with the post about exhaust duration?

 

Edited that after re-reading ur last post.

 

i think he is refering to the lsa type thing and camshafts that are suppose to be f.i. cams. some are running a lower lsa and some run higher. i think most have found that in these engines the cams with a higher lsa tend to yield more power.

 

The lower the LSA, the more overlap as a general rule of thumb. The overlap is when both valves are open at the same time, so the intake charge, being force fed instead of sucked in, just blows right through the motor.

 

Flyer,

the post you edited. could you repost?

a blower motor, could run a faster ramp on the exhaust side to assist escaping air, and a softer profile on the intake since it is forced, or assisted in a way.

 

Denali,

When you refer to a wide lobe seperation, creating more power.

Are you referring to the entire rpm band, or if not, at what rpms?

 

i think on a blower motor such as a radix i think the wider lsa will help hp. but im not sure where it will start or end. i think the lsa helps keep boost from bleeding off and the rest of the cam profile will determine the rest. we need bigtex to come on oin here and post up. i know he can explain all this a whole lot better.

 

The lsa is more to prevent overlap in the cam than anything else. The blower will make more power anytime the motor is operating under boost as oppose to the same setup running under vacuum.

SportSide, the split duration is more for the benefit of giving the exhaust valve more open time to let the exhaust escape sense it isn't being forced out in the same way the intake is being forced in.

Is that what you were looking for ?