Thanks for the input guys, sounds like this grind might be the go then. I was a bit iffy on the sub 0.020" duration numbers and thought it might bleed off too much cylinder pressure, while I have a reasonable understanding of the basics, the finer details of lobe profiles i don't have a good handle on yet.
AJ - They were going to grind this on a 110 LSA and I was go in to install it 4° advanced for a 106 intake centreline.
How do you calculate the intake closing point?
I've seen DCR calculators online that use the advertised valve events (assuming that's .006 for hydraulic and .020 for solid?) and others that use the @.050 timing + 15° - this cam would have a Ica of 65° or 60° if installed straight up depending which method you use.
Elevation where I am is about 200ft above sea level, and it will run on 98 octane unleaded - from what I can tell this is about 91/92 octane the way you guys rate your fuel. Heads are not assembled yet so I could still mill them a little to bring the compression up a bit higher but I think that money might be better put towards a geometry correction kit - what I've got with these heads and the 1.6 rockers is not terrible but not great either.
Will probably try it with the std convertor initially and throw it on a chassis dyno and take the printout and specs to the covertor shop like I did with my other valiant - that worked out very well even though it was a pain swapping them out.
Bewy - this grind is from Tighe cams, they ground the cam in my 265 and I am pretty happy with it, so I thought I would see what they had for the 318.
Unfortunately I don't have an old set of lifters to be refaced (sold them with the old cam) but I have found some new howards edm solids for a reasonable price. I thought most of the lifter problems people were having were with hydraulic lifters?
Will check out the isky cams but they might have the same core supply issues as howards.
Cheers,