effect of more lift ?
10-01-2006, 09:08 PM
#4
Depends on your heads, for the most part. If the increase in lift took the valve to a point where the port stalls or backs up, then you could potentially lose power.
However, .010 - .015 more lift would probably never net a measurable difference. I think you need .030 - .050 more to see a real difference with all other things being equal.
However, .010 - .015 more lift would probably never net a measurable difference. I think you need .030 - .050 more to see a real difference with all other things being equal.
10-01-2006, 09:54 PM
#7
The duration will make a bigger difference in PTV clearance than an extra .010 - .015 lift would. It pays to check clearance so that you know you're safe. If you already have the heads installed, you could still check with a dial indicator and some checking springs to be sure you'll clear.
It looks like the flow continues to improve up to (and perhaps even beyond) .600 lift. Consider notching the pistons if need be. The extra lift is more time spent in higher flowing portions of that graph, giving you the potential to make more power.
It looks like the flow continues to improve up to (and perhaps even beyond) .600 lift. Consider notching the pistons if need be. The extra lift is more time spent in higher flowing portions of that graph, giving you the potential to make more power.
