Hot Rods Double Head Gaskets for a Ford flathead

Is there a downside to use 2 head gaskets on a Ford flathead V8 to lower the lower the compression ratio? I need to give my piston a little more clearence
Thank You

 

Relieving the heads would probably be a better solution.

 

Valves are usually more trouble. Are your heads milled to much? Gary

 

Yes, This is an old engine build, 3/8 x 3/8 . Need to use copper gaskets because they thicker ( if use one) or pistons will hit the head.

 

Once we had to drastically lower the compression ratio of a high compression engine in order to run a turbo.
We used a soft copper head "gasket".
It leaked, and race day was two days away.
In desperation we used a standard head gasket above and below the copper.
Drastic reduction in comp ratio, but it held up and we took the fast cl*** trophy with a car we didn't think was ready.
Gasket held up running over 24 lbs boost. it topped out our gauge.

why be ordinary?

 

I used two gaskets on my Model A with a high compression head. I coated both with a few coats of Copper coat and they are still holding up. Have 2K miles so far.

 

We make gaskets for Flatheads from .027 to .140 at Cometic Gasket.

 

^^^^^^^^^^^ There's your best solution. They're pricey but on a flat deck with a head not warped, you ain't gonna blow them with any compression you can get outta a flathead, ***uming proper torquing.

 

And on the thickness choice...try to find a thickness that will put your piston clearance around .040 or so. More kills the turbulence from quench area, actually promoting ping even though compression is lower, and makes engine less responsive. Like a 1978 Chevy with fully dished pistons...bad power and response, plenty of clatter.