A co-worker of mine is building a 30 over 454. The block has been decked .025. He didn't realize it was decked until after it was assembled. Heads are preassembled edelbrock aluminum 110cc. Is there a head gasket that will work with this issue. Motor is going to make around 550hp and will be beat on badly.:) He has more info if needed. Thanks. -MATT

U can order cometic head gaskets in all kinds of thicknesses, but they require a VERY smooth surface to seal properly.

Pretty sure you can get FelPro off the shelf up to .061 thick.

Never used them before but you could also look at the copper gaskets.... they come pretty thick and are re-usable.
Would guess you need about a .060 compressed for a .045 quench.

Pretty sure you can get FelPro off the shelf up to .061 thick.

Not Felpro but...off the shelf and in stock :yes:
For a 4.320" bore...SCE-013326... .062" compressed.

Fel Pro 1017-2 is what I used, due to my pistons being .0115 out of the hole.

This gasket is .051 compressed, and should give you .036 quench. Just fine....

Since the block is decked .025 and the piston sticks out .015 does he need a .070 gasket to get back to stock piston to head clearance?

Since the block is decked .025 and the piston sticks out .015 does he need a .070 gasket to get back to stock piston to head clearance?

No, you want the best "quench" you can get, and using that Fel Pro 1017-2 with its compressed thickness of .051 gives you that, safely.

If you have piston to valve clearance issues, then you adjust accordingly by relieving the piston as necessary.

No, you want the best "quench" you can get, and using that Fel Pro 1017-2 with its compressed thickness of .051 gives you that, safely.

If you have piston to valve clearance issues, then you adjust accordingly by relieving the piston as necessary.

He was thinking that he needs .045 min clearance between head and piston. If not could you explain in greater detail. He's overbudget and weary.:) Thanks for the help.

He was thinking that he needs .045 min clearance between head and piston. If not could you explain in greater detail. He's overbudget and weary.:) Thanks for the help.

That will work also. I was recommending an off the shelf head gasket that will give excellent quench for what you are working with. .045 will work too. Why was he thinking that?

That will work also. I was recommending an off the shelf head gasket that will give excellent quench for what you are working with. .045 will work too. Why was he thinking that?

He was thinking that he read from Weisco that he had to have .045 min. We will do some more reading and probably shoot for .035-.040. Thanks again. -MATT

.030 will work fine. I've run .025 on oval track engines that were hammered hard. the .035 is the traditional fail-safe number published in many books. 0.045, dunno where he got that.