Isky 404A cam - Harley Davidson grind?

[Tim Ayers]

Originally Posted by jetmek

I think Harley gets its unique sound more from the cyl bank angle and single crank pin than from the cam...just send it to me and ill evaluate it for you ....Seriously tho I was told that was designed for circle track racing...Not much streetablity

Harleys get some of there sound from that but most from their unique way the cylinders fire one right after other. Almost like a radial engine would vs. A true twin.

[Frank Miller]

Originally Posted by Tim Ayers

Harleys get some of there sound from that but most from their unique way the cylinders fire one right after other. Almost like a radial engine would vs. A true twin.

They don't fire one after another but they are not 360 degrees apart. As said earlier the single pin will not allow this as when one piston is at the top on compression the other is almost at the top on exhaust.

[Tim Ayers]

Originally Posted by Frank Miller

They don't fire one after another but they are not 360 degrees apart. As said earlier the single pin will not allow this as when one piston is at the top on compression the other is almost at the top on exhaust.

Frank

Thanks for the clarification. You are right. It's something like 315 degrees apart causing that pop-pop sound. Must have had a brain hiccup.

Tim