Intake manifold gasket

[Boiler Ben]

As I continue to get my intake manifold in place, I am searching for thick gaskets.  I have Edelbrock Performer RPM heads and intake.  From what I’m reading, this would be similar intake port size to 427 medium riser.  I need a gasket that is 0.090” to 0.100” thick. I thought I found the right one, a Cometic C5137-094.  The openings are 1.408” x 2.345”.  That is larger than the 1.4” x 2.1” Edelbrock 7224 gaskets I have already which fit port-wise.  The Cometic site says it fits all except 427 SOHC.  But if all the extra port height is to the bottom like what I see in pictures of low risers, then it might “fall off” the bottom of the intake manifold.

Any ideas?

[My427stang]

A low riser gasket will likely seal fine.  The head will be fine of course and the RPM intake should have enough meat below.

Some Sidewinders and other intakes are shorter below the port, but the RPM should be OK, just check after you get the gaskets

I still wonder what you are running for head gaskets that is making the heads sit so tall.  All I can guess is uncut block with new heads and an 8554 head gasket.  People generally have the opposite problem with FE intakes

[Boiler Ben]

My head gaskets are Edelbrock 7337 with 0.038” compressed thickness.  It is strange and I don’t know what the original assembler did to the block.  I won’t breathe easy until the engine runs, makes power, and doesn’t leak anywhere. Meanwhile, the Factory Five Cobra kit showed up so I have my hands full with that too.

[My427stang]

My guess he did not cut the decks and you have an abnormally tall one, which spread the heads farther apart and drop your intake.

FEs tend to be wavy and unsquared, so hopefully the deck is flat enough to seal.  Always stinks when things are goofy. 

[blykins]

FEs tend to be wavy and unsquared...

Hahaha, who was that ying yang that got mad and told us that Ford's machining techniques from 60 years ago were spot on?  LOL

[jayb]

On multiple occasions I have glued intake gaskets together with The Right Stuff to get a thicker gasket, and never have had a problem.  Usually it was Mr. Gaskets 202A gaskets.  I remember when I tested an old Pro Stock engineering base I needed to glue three gaskets together on one side and two on the other.  Sealed up fine that way, surprisingly.  I wouldn't hesitate to try something like that to solve this problem.

[My427stang]

FEs tend to be wavy and unsquared...

Hahaha, who was that ying yang that got mad and told us that Ford's machining techniques from 60 years ago were spot on?  LOL

LOL