I do have standoffs already installed but I'd certainly like to hear your idea anyway.

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No, actually the top dog is copper as far as head gaskets go. That is what you should run. Even companies that make both copper and Permaseal composition style rank copper as the top of the ladder product for this type of application.

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There's no such thing as too much cam....only not enough engine!

Yeah, I understand the Permaseal is considered the top choice. That's why I bought a couple. I guess I just didn't absorb the fact that the bores are 3.66". I certainly don't see many folks running cylinder bores anywhere near that big.

Regardless of which gasket I use I'll be installing orings.

Anyway I'm not comfortable with the deep narrow slot that it will create all the way around the combustion chamber. Guess I need to do some more research to get a feel for whether it is enough to be a potential problem. At best it's one percent of the chamber volume that is dead space. Too tight for the flame front to penetrate and burn the charge that would be forced in there. At worst it could be a potential source for detonation to start.

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I was actually coming from the perspective of over the counter head gaskets, copper has been typically something that is not stocked often for our engines and has to be ordered, and should be planned with the build before machining starts

How much boost are you expecting to run? I've never had a problem with the 3.66 oversize on a .060 OS bore and 12:1 compression, when I pulled the head I had no soot or lead deposits in that gap, but if you are going for a fair amount then O ring and copper are going to be needed....

Oh ok, I didn't realize we was restricting himself that way.

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There's no such thing as too much cam....only not enough engine!

That's the second comment you've made that I don't understand.

Who is restricting what? How?

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This is for dumbbell lifters.

Put a groove on the low side, but only half way down (or whatever length is needed to get to the cavity of the dumbbell)

Oil then fills the cavity from the low side.

The top side of the upper groove becomes a air vent.

the low side of the upper groove supplies oil to the cam lobe.


You'll end up with a small reservoir of oil in the dumbbell.

I think it would supply oil if you don't have standoffs, and might help with standoffs.

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

I do have dumbell lifters. Since I also have the standoffs installed oil coming in through the slot in the high side will fill up the lifter cavity anyway.

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Ready to assemble the head.
Engnbldr oversize valves, 340 valve springs, positive valve seals.

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I'm on a semi-business related road trip and arranged to stop by Copper Gaskets Unlimited in Phoenix, Az.
I've done business with CGU for years for motorcycle gaskets.
Here's my buddy Lani Visconti (Mr. CopperGasket) wrapping up my custom .063" head gasket.
More pics coming when I get back home.

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Here's a better shot of the .063" copper gasket. It's a very nice piece.
The guys at Copper Gaskets Unlimited do nice work. Here's a link --> http://www.coppergaskets.us
The bores on the gasket are just .020" bigger than the cylinder bores.
This eliminates the deep pocket I would have had with the Permaseal big bore gasket.


Setting up the depth of cut for the o-ring grooves.


And cutting


I have some sweet cable cutters that make a nice square cut in the wire.
With these only a tiny bit of filing is required to get nice square ends in the wire.


I made the first o-ring but it wasn't a very snug fit in the groove.
Turns out the .040" wire I bought on eBay actually measures out at .035" Damn!
Nothing else will happen until I get some properly sized wire.

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I left my excess wire with Andy up at Junction City CarQuest. Should be plenty on hand. Give him a call.

CJ

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Part of Tyrde-Browne Racing

Thanks CJ. I appreciate the offer but I have some on the way.
Don't worry, I have PLENTY of other projects to keep me busy in the meantime!

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O-ring wire in place.
Getting the end gaps right was tough at first but got easier with practice.
The wire ended up .011" above the deck surface.

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Finally getting to put some stuff together and it feels good!

ARP studs, main bearings, crankshaft and rear seal all in.

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