[potentpontiac]

How many of the Higher Compression motors, and or Boosted use SCE Copper Head Gaskets. I have been using Cometics at 14.6-1 Comp. I was thinking of switching to the SCE Gasket. Are these re-usable? Being an Aluminum block and head deal,I thought about switching over to the Copper Gaskets.

[RAIV-Z]

I'm using SCE 0.080 with double O-rings. I've reused 1 head gasket after dropping an intake valve.

[GTOGEORGE]

I have the ones with the built in SS o-rings in them, they seem to be OK.



GTO Gey

[BLANK1]

Flatout has rubber coated copper gaskets for Pontiac. Has anyone used these?

[mgarblik]

Originally Posted by BLANK1

Flatout has rubber coated copper gaskets for Pontiac. Has anyone used these?

Yes, we have been using the coated copper gaskets from Flatout for over 20 years. The Boss Bird has the original set of head gaskets we put on in 2010. Zero leakage, they have been on and off the engine at least 20 times. They have drawings for many Pontiac gaskets. Highly recommend.

[slowbird]

Originally Posted by potentpontiac

How many of the Higher Compression motors, and or Boosted use SCE Copper Head Gaskets. I have been using Cometics at 14.6-1 Comp. I was thinking of switching to the SCE Gasket. Are these re-usable? Being an Aluminum block and head deal,I thought about switching over to the Copper Gaskets.

Curious are you seeing issues?
Im around 16:1 with Cometic and havent see any issues yet with my HP heads. My dad has seen some water leaking on his but his e-heads have thousands of runs (been running since 1995) so i think the issues we are seeing are from the heads being used up.

[potentpontiac]

I was thinking better Sealing with Copper as Temperatures change. More consistent Heat distribution In the Combustion chambers. No Issues with Cometics so far. I feel the benefit to the Copper Gasket is that it is more uniform being 1 solid piece VS Multi layer Gaskets.

[potentpontiac]

Does the Flatout Rubberized Gasket Need O-Rings in the Head and or Deck? SCE sells a Copper Gasket that doesn't require using O-Rings. I have 2 sets of the Flat out Gaskets. However the Bore size is 4.250" I need 4.380".

[Scott Stoneburg]

Originally Posted by slowbird

Curious are you seeing issues?
Im around 16:1 with Cometic and havent see any issues yet with my HP heads. My dad has seen some water leaking on his but his e-heads have thousands of runs (been running since 1995) so i think the issues we are seeing are from the heads being used up.

I'm interested in the last part of your statement about the heads being used up. I can understand the valve guides or seats wearing over time. But what would wear out and cause water to seep?

[bad69bird]

I'm using the SCE copper gaskets with no issues. Whether or not I re-use them, depends on how many passes I have on them.

[jimmy daniel]

What about the Marty rings? Has anybody tried them?

[jimmy daniel]

I know Frank at All Pontiac uses them on his motor.

[slowbird]

Originally Posted by Scott Stoneburg

I'm interested in the last part of your statement about the heads being used up. I can understand the valve guides or seats wearing over time. But what would wear out and cause water to seep?

Years and years of abuse, been over heated probably a dozen times. In my opinion the alum just isn't as hard as it once was (maybe lost the heat treat?), seem softer now.

[steve25]

If I am not mistaken Brodix offers a retempering service for all heads, not just there own.

If you have expensive CNC heads then it's worth the rebuilding cost that will be needed after treatment.

[Jim Robertson]

FWIW We recommend the Cometics for your combination. Gasket built to your specs...no extra machining, Cost effective, Supports lots of HP, Simple & Easy. Unless there is something else going on that we are unaware of.

[Scott Stoneburg]

Originally Posted by slowbird

Years and years of abuse, been over heated probably a dozen times. In my opinion the alum just isn't as hard as it once was (maybe lost the heat treat?), seem softer now.

Ok. I see what you mean. Thanks.