BASE GASKET AND COMPRESSION
Posted: July 18th, 2011, 10:24 am
after revamping an 87 500 for my best friend we realized it would need a new topend bafore this next season,we have everything set (piston,v-force reeds,39 carb) and given his past with drag cars and such, he is good with a drimel,so a little porting is on the way.
he brought up an issue.the 85 has 7.4 to1 comp,the 86-7.0 and from 87 on the comp is 6.8 to1.my reserch showes the head is the same as well the head gasket is the same part 3 from 87 to01.
the base gasket was a differtent # for 85,86 and 87 but have all been superseeded to the current mac part#.
i have 3 base gaskets,oem,atheena and k&s,the atheena measures .200,the oem measures .210 and the k&s measures .225.
will the atheena give more compression,butt change the port timming to adversly affect the band. he is a dezzert rat like me and anything butt wfo will not due.
he brought up an issue.the 85 has 7.4 to1 comp,the 86-7.0 and from 87 on the comp is 6.8 to1.my reserch showes the head is the same as well the head gasket is the same part 3 from 87 to01.
the base gasket was a differtent # for 85,86 and 87 but have all been superseeded to the current mac part#.
i have 3 base gaskets,oem,atheena and k&s,the atheena measures .200,the oem measures .210 and the k&s measures .225.
will the atheena give more compression,butt change the port timming to adversly affect the band. he is a dezzert rat like me and anything butt wfo will not due.