Originally Posted by Slomotion34
The engine was balanced before the rebuild... since the crank was only polished and he same rods were used, I only paid attention to matching the pistons. I am getting away with 93 octane (Timing is 18* initial and total advance comes in at 30*). No knocking or pinging, run-on, or any other signs of detonation, and the plugs look good. I only have about 400 miles on it. Very happy and surprised to not have any cooling issues either...even in stop and go 95* weather.
I couldn't be happier with the combination - the 294/300 adv duration knocks the dynamic compression down to usable levels with pump gas. It pulls harder than I expected. Now to tackle the traction issue and start on the body work. 8.5 mpg is what I figured out... hopefully get it a little higher with some tuning.
Hi . Thats impressive with 18 and no pinging. I had to drop my 347 back from 12 to 8 to knock out the pinging. I could have gone to 98 instead of 93 but 93 here is $6.25 a gallon.
so 98 is not an option.
Sounds like you will have a trouble free engine there. With twin quads on your build i am guessing that a finely tuned engine thats loosened up after a good running in will give you around 12 mpg. Whats gas worth over there.
Cheers, safe rolling.