View Full Version : clearance
iceman454
03-29-2008, 01:25 PM
i got 0.085 valve to piston clearance on a 496 bbc .it will only see the track .will be good ???
jmarksdragster
03-29-2008, 02:24 PM
Intake is fine, exhaust needs to be at least .110 to .120.
us7race
03-30-2008, 06:33 PM
Is that with or without lash?
jmarksdragster
03-30-2008, 08:40 PM
With
Tod74
03-30-2008, 10:38 PM
I always heard .080 int .100 exh I check mine with zero lash so I have a cushion
johnracer
03-31-2008, 02:38 AM
I always heard .080 int .100 exh I check mine with zero lash so I have a cushion
Yep me too. Those are safe numbers. You can run them considerably tighter depending on max rpm and rod type. Many stock eliminator cars run under .040, but they don't usually expect to get 300+ passes either...
iceman454
03-31-2008, 11:25 AM
some say yes same say no hmmm??
mytmouz
03-31-2008, 02:50 PM
When in doubt, don't take a chance...