Offroad Spec Cams?

[idealer]

I have a couple nascar engines that I am sending the cams in to get ground down at comp they all have a tone of durration and like 420 lift I was thinking of like 256/260 or 252/256 durration what do you typically see used in our application. In a small block/ odd fire v6... they are like 276/282 now...

[SPONSOR]

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[63chevyll]

just curious what the lobe lift is on those cams? and from what era are they from

[idealer]

just curious what the lobe lift is on those cams? and from what era are they from

The motor in question is a odd fire v6 it has been in storage since 93 it is a dyno only test motor and has 420 lobe lift with jesel 1.55/1.65 rockers

I have around 100 dyno pulls with documentation on it... with a 262/268 it pulled 455@7250 with a 390cfm carb it had around 350ftlb @ 4750

[07FJRog]

great numbers, why change it?

[idealer]

Looking to make more torque and power earlier...

[scottm]

I am about to order a custom Comp Cams grind in the next couple weeks for a 377 (400 block, 350 stroke). I am getting a single pattern cam - 248° int/ex at .050, 108 lca, and .580 lift with 1.5 rockers. Chevy heads have very good exhaust ports, and with a good race exhaust system, less exhaust duration is needed, assuming relatively low max rpm, say 6500-6800. Less ex duration will improve low to mid torque - helpful with a heavy truck on 37's.

[FABRICATOR]

That's where a roller cam can excel. Faster open and close provides longer wide-open time for a given duration.