Engine Builders talk.
#8762
Senior Member
Exactly, dynamic compression is the biggest factor of knock/octane needed, I'm building a 12.1:1 377 for my chevy mud truck that has a dcr of 8.2:1 that should easily run on 93
#8763
Senior Member
Damn robots!
From what I recall, Ford replaced the complete pass side head.. Under warranty and after IF you biatched enough and new the correct number to call lol.. That was way back when tho. I haven't heard of a fix.
From what I recall, Ford replaced the complete pass side head.. Under warranty and after IF you biatched enough and new the correct number to call lol.. That was way back when tho. I haven't heard of a fix.
#8764
Exactly. My dynamic compression ratio is around 10.6:1. Definitely on the limit of running pump gas.
#8765
Senior Member
Rule of thumb in the chevy world is 8-8.5:1 dcr and a max of around 220 cranking cylinder pressure on 93 octane, it is a little harder building engines using carbs and hei ignition, can't pull timing or fuel like fuel injection without the engine running like a turd. Oh I remember the early days of nitrous and distributors, glad they're gone.
#8768
Senior Member
#8769
Senior Member
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