My cam says 0.010 for intake and 0.012 for exhaust. Is this an OK setting to start with, knowing they need to be readjusted when they are warm. I just need to break in the cam for about 20 minutes and I need a setting to allow it to run at about 2000 RPM for that period of time.

Thanks,

bwhitejr

_________________
'72 Duster (Performance 360)
'83 Ramcharger (Performance 318)
'80 TrailDuster (360)
'80 D-150 Truck (See Below)
CompCams 252S, Holley 390cfm, Offy manifold
Ported, Polished and Gasket Matched
P4286813 Springs,0.040 Overbore,
0.090 Shaved Head

Adjust them to 0.013 and 0.016 cold and that will get you pretty close to the hot settings.

Lou

_________________
Home of Slant6-powered fun machines since 1988

The CompCams factory Rep says the cold settings should be 0.006(I) and 0.008(E). I am confused, should the valves be set looser when cold or tighter?

bwhitejr

_________________
'72 Duster (Performance 360)
'83 Ramcharger (Performance 318)
'80 TrailDuster (360)
'80 D-150 Truck (See Below)
CompCams 252S, Holley 390cfm, Offy manifold
Ported, Polished and Gasket Matched
P4286813 Springs,0.040 Overbore,
0.090 Shaved Head

When the engine warms up, it'll tighten up a bit, then it will be close enough for the break in, then you can relash it to spec if needed...even then the lash spec for that comp cam isn't the best either...


-D.idiot

Is there a better setting for the lash than the 0.010(I) and 0.012(E) on the cam card?

bwhitejr

_________________
'72 Duster (Performance 360)
'83 Ramcharger (Performance 318)
'80 TrailDuster (360)
'80 D-150 Truck (See Below)
CompCams 252S, Holley 390cfm, Offy manifold
Ported, Polished and Gasket Matched
P4286813 Springs,0.040 Overbore,
0.090 Shaved Head

They need to be set looser when cold, not tighter. The guy you talked to wasn't paying attention or didn't care or didn't know what the heck he's talking about.

Every time I hear another story like this, my distaste for Comp Cams as a company grows.

_________________
一期一会
Too many people who were born on third base actually believe they've hit a triple.