Posted: Tue Feb 02, 2010 12:02 am
What is the best cam timing for a 1/4 mile oval something with a good mid and top hit?
List with timings:
106i/106e is factory spec and is strong on the bottom and mid
106i/109e settings are reported to have a smooth power delivery and more on top
107i/108e settings are reported to work well for mx with a strong mid and top
108i/106e settings are reported to have a good top end hit without loosing too much low and mid
108i/108e settings sacrifice some bottom and mid for more top end
And a quote from C27:
On my 432 ported motor I am 111in and 108ex with open airfilter and exhaust loss of bottom end isnt a issue.With airbox on and toaster exhaust the bottom end loss is huge but works well for me in the tight Harescramble trails since I am real slow there anyway.Once its revving it hits hard almost Banshee like.54hp with open filter and exhaust 49hp with airbox and toaster.