Hey Doc,
I asked the same basic question of Gordon Levi - see below - and his response follows - I don't know how close to my engine spec's you are, and you must keep in mind that we are limited to what max octane ratings we have in "pump" gas for the street - - - anyway - his opinion matches with what I've experiences (especially with the type of cam I'm running & 10,5 to 1 compression and higher on our pump gas).
, can you suggest a spark plug and initial msd distributor timing set up for the following engine specs? And, thanks for your time, inputs and advice.
65 289 block & crank - fully prepped & rotating assembly balanced
custom long rods & lightweight pistons - ~ 10.5 to 1
comp cam - solid roller - 575 / 579 lift, 290/294 duration, 109 sep
victor junior heads
air gap rpm or victor jr intake (i have both, but the victor jr extra height may not fit in the gt 40)
holley 4150 hp pro 650 cfm carb
msd pro billet dist & 6al box
full crossover exhaust
\
Gordon's answer:
I'd run an autolite 3924 and gap them to .035.
That engine isn't going to need any more than 30-32 degrees of total timing, probably closer to 30.
I asked the same basic question of Gordon Levi - see below - and his response follows - I don't know how close to my engine spec's you are, and you must keep in mind that we are limited to what max octane ratings we have in "pump" gas for the street - - - anyway - his opinion matches with what I've experiences (especially with the type of cam I'm running & 10,5 to 1 compression and higher on our pump gas).
, can you suggest a spark plug and initial msd distributor timing set up for the following engine specs? And, thanks for your time, inputs and advice.
65 289 block & crank - fully prepped & rotating assembly balanced
custom long rods & lightweight pistons - ~ 10.5 to 1
comp cam - solid roller - 575 / 579 lift, 290/294 duration, 109 sep
victor junior heads
air gap rpm or victor jr intake (i have both, but the victor jr extra height may not fit in the gt 40)
holley 4150 hp pro 650 cfm carb
msd pro billet dist & 6al box
full crossover exhaust
\
Gordon's answer:
I'd run an autolite 3924 and gap them to .035.
That engine isn't going to need any more than 30-32 degrees of total timing, probably closer to 30.