kaama,
how do the hardened exhaust seats hold up when installed? i was kicking that idea around of having it done but was afraid they may fall out. i'm not familiar with that process. i know they are cast in from the factory.

hi BT,
i put in 2 comp cams extreme 4x4 cams this year,
int .544 exh .564 226/234 111* LSA
it was $99 from summit. i went with the edelbrock torquer springs to match the cam and no modifications were required on the heads. also used crane anti pump up lifters. the 4x4 cams make lots of torque and they sound really nice at idle. no reversion with emi thunders. rpm range is 2800-5800. i'm not trying to sell you comp cams, but i'm happy with my choice. my heads are 325cc rec. port with 2.19 x 1.88 valves with a dual plane intake by the way. my boat is 10,500 lbs. comp cams grinds those cams with a 4* advance in them so i set them straight up. good luck with a tough decision. if it were me though i'd get the aluminum heads redone and use them.

Its definitly not a Max cam but with stock compression (9-1 or less) and pump gas and silent choice (Gils) its about as far as I wanted to go. I cant find my cam cards right now but I think its about 224, 232 at .050 and .527, .553 lift at 114 lobe sep. I set the #1 intake cl at 106 which is advance about 4 degrees. As always, cam break-in is critical especially since I am using stronger springs than they recommend.

Thanks Excal... what are you using for carburation?

Did you get Total Eclipse back up north yet?

BT

Ive had many 781 heads redone with hardened seats all around with bigger valves. Never had one come out. I think they are pressed in but Im actually not sure. (one of the few things I rely on a good shop)

Is that a flat tappet Formula31? If you find the cam card... do you know what the duration is a .004" lift? Dennis Moores book has taught me just enough now to be dangerous.. If you don't mind me asking, how much did your shop charge for the change in valve seats... and valves if applicable.

BT

I like excals cam choice. I probably couldnt get away with it with my exhaust. The magnum choice set up puts the water in about where the stock set-up does if not sooner.

Is that a roller cam Excal?

BT

Yea, flat tappet. Duration numbers at .004 are basically meaningless, as far as I know. I know some manufacturers still list an advertised duration which is usually around .008. Ill look but I dont think they even listed that. Theres another real good bbc power book by Alex Worlordy (sp).

I doubt it at that price.

BT,
i didn't bring the Total Eclipse up yet. i sold the small one and have been busy making sure its ready for the new owner.(beating it) If you want to hear the rumble those cams make, i'll let you know when it's here.
the cam is not a roller cam. .006 tappet lift 270/278. a roller cam kit with springs and lifters is minimum $600 last time i was looking. i'm running edelbrock 750 cfm carbs re-jetted 8% richer on the main and secondary side with electric chokes.