napaul

my engine on early 89 964 c4 with 3.6 being rebuilt mechanic asked if i want the head gasket installed or not said i would lose some compression.i am wondering with the arp studs that he installed allowing the heads to be torqued a little tighter should i still install head gasket and sacrifice a little compression or not?and how much compression loss would we be talking about enough to notice?

wellcraft290

I don't know how you would lose compression? from the minimal gap on the gasket? Mine was done but was done by adding the grove for the gasket. not just a gasket slapped in there

race911

What's the formula--1 point of compression is 5HP? Anderson had it in his book from the dyno work Woods did back in the Garretson days.

In any case, as wellcraft mentioned, the CE (it's not a head) gasket doesn't change combustion chamber volume.

napaul

well i went to go meet him and see it and he put the gasket in for me. he did a nice job of cleaning the heads glass beaded them to get all the grime off.then put them in parts washer and here is what he came out with.New valve guides installed and new intake valves waithing to be put in.