Different cam duration

[Thor W]

Hi guys

Is there anyone who can tell me, why somebody mount 2 cams with different duration? Ex. 304 in and 300 ex?

[jondee86]

Shamelessly stolen from Club4ag.....

http://www.club4ag.com/faq%20and%20tech_..._story.htm

Quote:An interesting aspect of cam duration is the use of a dual pattern or
different duration cams for the exhaust and intake. When used correctly,
a different exhaust duration from the intake can broaden the torque range,
but generally speaking they will not deliver as much peak torque as can be
found with matched cams in a narrower RPM range.

This is not all bad because it is still torque that wins races. Typically you
will see the exhaust cam one step lower in duration than the intake to
broaden the torque range, but I have not seen anything that says you can
not do it the other way around.

There ya go

Cheers... jondee86

[Thor W]

Thanks