74strokerbronco
Full Member
I don't get what the mystery is about a custom grind for one, but as a engine builder without all the specs on a particular cam how can I choose piston dome, +/- piston dome cc. cc of chamber ,valve springs or even lifters especially on solid roller setups. if the profile has extreme ramp speeds I better know so I can choose the appropriate lifter, will a standard lunati do or will it need insky redline extremes. when building a race motor valve event timing especially the actual intake closing is very important for compression calculations etc. the cam and heads are the lungs of the motor and you can't make a motor around the lungs in less you know what blood those lungs need.
95% of the people use a (by the seat of there pants) dyno and I bet you they will never FEEL the difference of if this cam or that cam gained or lost 10 horse or 15 foot #'s . why do all the major grinders such as comp, crane, inski, lunati, ect publish there cam specs then ? I understand secrecy in the competitive racing world but some of these custom grinders are acting like the rest of the population using there cams for none competition uses are going to let some secret out. to who? what secret ? asymmetric lobes ? lobe separation. high lift short duration close separation there no secrets. but I sure in the hell want to know the specs so I either know what I need to adjust buildwise or choose a different cam that will work with what I have .say I already bought all my rotating assym. and heads now I need a cam, do I call a custom cam guy up and say hey I have this combo now make the cam you think I should run? no not me I'LL tell the grinder what specs and timings I want thank you or choose a grinder that will provide all the specs I want . just my opinion yddayp.
I see it this way, spend your big dollars on your custom grind that are no different then the published cams except for some centerline or lobe separation numbers and I'll use a published cam of similar spec or intent for less $ and 95% of the peoples seat of the pants dyno can not tell the difference.
is there a place for secret cams specs ? hell yes in the competitive racing world . is there a need for secret cam specs for the average consumer or engine builder . I say hell no.
95% of the people use a (by the seat of there pants) dyno and I bet you they will never FEEL the difference of if this cam or that cam gained or lost 10 horse or 15 foot #'s . why do all the major grinders such as comp, crane, inski, lunati, ect publish there cam specs then ? I understand secrecy in the competitive racing world but some of these custom grinders are acting like the rest of the population using there cams for none competition uses are going to let some secret out. to who? what secret ? asymmetric lobes ? lobe separation. high lift short duration close separation there no secrets. but I sure in the hell want to know the specs so I either know what I need to adjust buildwise or choose a different cam that will work with what I have .say I already bought all my rotating assym. and heads now I need a cam, do I call a custom cam guy up and say hey I have this combo now make the cam you think I should run? no not me I'LL tell the grinder what specs and timings I want thank you or choose a grinder that will provide all the specs I want . just my opinion yddayp.
I see it this way, spend your big dollars on your custom grind that are no different then the published cams except for some centerline or lobe separation numbers and I'll use a published cam of similar spec or intent for less $ and 95% of the peoples seat of the pants dyno can not tell the difference.
is there a place for secret cams specs ? hell yes in the competitive racing world . is there a need for secret cam specs for the average consumer or engine builder . I say hell no.
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