double head gaskets? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

qwikcorty · 01-08-2004, 04:15

i was wondering how reliable would using twin head gaskets be? any problems?

clevo · 01-08-2004, 04:19

Yeah it can be done, it lowers the compression 1, ie from 11:1 to 10:1

Or use a large copper based head gasket. Std gasket thickness is around 4thou not sure on the Felpro, think its less.

Dellboy999 · 01-08-2004, 14:52

Dont put in double head gaskets, you will get problems you don't want, get a thicker one instead.

Why you want to for, you trying to lower compression or did you get everything machined and trying to get back to normal.

Jason

qwikcorty · 01-08-2004, 19:21

my bottom end has std flat top pistons, but the heads i have worked out at 58cc chambers, and on my engine will be 11.5-11.8:1.
just need some heads to wack on it b4 i get better ones.

TyreToaster · 01-08-2004, 20:56

copper head gaskets go up to 90thou which will be enough for your problem they cost around 175 a pair and dont pose any real issues exept that your manifold may need extra gaskets to bring it up to spec, 2 sets of standard 40though gaskest would cost that if you brought decent ones.

Racer · 01-08-2004, 22:02

You could end up with more trouble than you started with. Thicker gaskets increase the quench distance which also inhibits detonation.

qwikcorty · 01-11-2004, 16:31

racer, could u explain some more about quench distance etc, unless i fall onto some money soon, ill be using these with 2 gaskets for now. and the limiters set at 5000 till i get better valves.

ebxr8240 · 01-11-2004, 16:52

The flame stays in there as it doesn't have complete burn.So when next compression takes place it will detonate or fire too early..Thats the reason why also 4 valve heads can get away with high compression on blown engines....

TTNOS8 · 01-12-2004, 14:09

If your not planning on keeping the heads, can you open up the combustion chamber a bit to lower comp some?