Head gasket info

Three used gaskets .That have been on running engines .

1] 1018 F-P . .04570" never compressed tab w/logos and #s .
.04070" end - .04155" middle - .03925" end
2] E3HE-6051-A5A older A441 FRPP . non-compressed .04605"
.04010" end - .04075" middle - .03895" end
3] F0HE-6051-A5A newer A441 FRPP . non-compressed .04585"
.04215" end - .04240" middle - .04180" end

#3 looks to be the most consistant about leveling out when torked.this should keep the power moor level across each cylinder,correct?

also #1&2 have compressed the most and uneven that can cause tuneing issues in one or moor cylinders,possably burned pistons or even worse with nitrous? that is if you were on the edge of the tune.

On any off the gaskets the ends trend to be smaller . The ends were measured at the exh. corners . Looks like a little cyl. head bending of the cyl. head at the corners . A guy could have [if he was not in a hurry and had 3 gaskets to smoke over] and "mapped" [about 12 places] a single gasket to get an idea of what to tq. each stud/bolt .

Lem Evans wrote:On any off the gaskets the ends trend to be smaller . The ends were measured at the exh. corners . Looks like a little cyl. head bending of the cyl. head at the corners . A guy could have [if he was not in a hurry and had 3 gaskets to smoke over] and "mapped" [about 12 places] a single gasket to get an idea of what to tq. each stud/bolt .

about 8 or 10 years ago we exp with just that,all kinds of different tq numbers on a bb ford 514ci about 15to1, just to see, we did every bolt diff, the top bolts,inner bolts,from 160 down to 110,about 30 330 foot passes ( tryin to put a nos engine on the edge) later we went back to 140 across the board, we wanted to see what would happen to the head gasket,also trying some diff ones,knetics did not like this at all,fel pro were more forgiving, i had my notes on this somewhere but they are probaly gone.