PRH
Well-Known Member
I don’t often bother with threads like this, since there are so many variables........ but what the heck.
Rebuilt, new 360 short block brought in.
Oe type pistons way down the hole.
It showed up with some HD “truck” type 318 heads(the ones with the water crossover instead of exhaust crossover, and they use 18mm spark plugs).
Heads were actually already installed on the motor, but the 18mm plugs were a red flag.
After researching the head casting numbers and seeing what they were, we talked them into using something more performance oriented, so they bought some Speedmaster heads.
Heads were checked out for seat run out, guide clearance, spring load, surface flatness...... all good.
8:1-ish CR
Comp XE268 cam
PRW rockers
STD Performer intake
Eddy 750
1-5/8 - 1-7/8 x 3 headers
It’s on the dyno now...........Guesses?
Rebuilt, new 360 short block brought in.
Oe type pistons way down the hole.
It showed up with some HD “truck” type 318 heads(the ones with the water crossover instead of exhaust crossover, and they use 18mm spark plugs).
Heads were actually already installed on the motor, but the 18mm plugs were a red flag.
After researching the head casting numbers and seeing what they were, we talked them into using something more performance oriented, so they bought some Speedmaster heads.
Heads were checked out for seat run out, guide clearance, spring load, surface flatness...... all good.
8:1-ish CR
Comp XE268 cam
PRW rockers
STD Performer intake
Eddy 750
1-5/8 - 1-7/8 x 3 headers
It’s on the dyno now...........Guesses?
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