The Dodge Challenger Message Board

I can get a 440, 69 block, Balanced, With 30 over 12-1 Ross dome pistons, Stock rods with beams polished & arp bolts, Mildly Ported 906 heads,new stainless Ferra 2.14 & 1.81 valves with 10 degree retainers, M-1 mopar intake,850 Holley, Has a Comp 585 solid lift cam, Isky adjustable rockers, Arp head bolts & Main cap bolts. any quesses on H.P.?

Put engine questions in the engine section of the board please.

Is this for street use? 12:1 compression is too wild. You would have to use race gas.

No idea what cam this is. I looked at the Comp Cams website (did you mean comp cams?) and could not find it.

You find me the cam spec (valve timing and lift) and I can tell you what kind of power it will be putting out and around what rpm too.

Mild ported heads sounds funny for an engine with 12:1 compression. An engine with a big cam will need more than a mild port.

Sorry. As soon as I went back to see the posting, I realized what I had done.

No worries. I just have to keep you lot in order.

Yeah if you can find out the full cam spec or give me a link to the numbers I can see what we are dealing with.

Is it still OK to answer on here, or should I go look elsewhere ? Anyway here goes.
Thats an old solid flat tappet grind by Comp, used to be in the Drag section, 275/275 @ .050", .585/585 lift, 108 lobe seperation.
It was a competitor to the old Mopar .590" pn 4120663? I think ? and Crane's old 560/580 ?
Comp R&D 'ed 3 cams for Mopars old direct connection program in the late 70's that resulted in the 3 Mopar Pn #'s 4120559, 4120661 & 4120663, which respectively were the .528", .557" and .590" flat tappet series. Comp then released their own "slightly changed" competitor versions for sale, hence that .585" designation on a 108 L.S. versuses the mopar .590"s agressive 106 LS.
ENOUGH HISTORY !
Anyways, that cam was a staple we used for about 10 yrs on budget style bracket motors up to around 600 HP, iron head motors, similar to what you described, using ly rods and that ballpark C.R.
Without knowing your actual head flow numbers, but using your description, I'll guess it should be good for 585 Hp.
How high is your dome on the pistons ? If it is an actual high dome 12:1 C.R., install that cam @ 104 above 2000 ft elevation, no later, and keep it to 6500 rpm shift point. Much past that and you'll start to really hammer #4 maincap with the iron heads cause the plug placement impedes a good flamefront propagation, fuel wash makes it hard to fire, similar effect to a detonation and presto #4 rattles.
It'll be a great little performer, I think you'll like it.
Bob out

Reread the post, Mildly ported 906's and M-1 ? I'm in the "pool" at 560 ballpark, 6300 rpm?
Anybody got one of those dynodreamer programs for their 'puter, I just melon guessing ?