Comp cams xe268h for 318

dartfreak75 said

Ok thanks buddy I wasnt sure on those heads I looked it up and I found a list that had how much was need to remove 1cc for a bunch of different heads I didnt see 302 heads so I just went with la 318 heads it said .005 so that what I went with for 360 heads they had it listed at .0048. Either way if I'm above 8.5 I'm not going mill anything....yet ;).

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Yep, those numbers you list are for open chamber heads. The amount needed to mill for each cc reduction in chamber volume goes up when the chambers become closed.

BTW what kind of price are you getting for the Speed Pro's? The best I am seeing is on RockAuto at $22 each. Not too bad and half of the cost of KB167's.

I sincerely don't agree in the 8.5 number being adequate with the present cam. But the important thing is that you are becoming 'armed' with info and learning how it is done. You can make your own decisions and have a good idea of why things turn out like they will, and how to make things different. I.e, you are DESIGNING for a result, not just blindly following a formula. You can then fill in that framework of understanding with real data .... like don't slap 360 heads on a 318, or put a 300 duration cam in a 7.6 SCR Opel 1.9L engine and expect it have any low RPM torque LOL

Do yo have a favorite DCR computing tool yet?

All of this applies to the matter of low-mid RPM torque, for street/driver use. Things like peak HP for a different use goes into other matters.