just built a 540ci
dart big m block
dished JE 8.25-1 pistons
merlin 345 iron heads, ported/polished
billet solid roller .252/.262 @.050 .652" lift 114 blower cam
comp rockers/stud girdles
imco powerflow exhaust
littlefield 8-71 blower/intercooler
dual 750 holley carbs mechanical and electrical fuel pumps
8% overdriven right now, wont know boost numbers until i get it running, what kind of boost will i be safe at with pump gas?
with pump gas, what kind of timing curve should i put in it, with what final timing? or lock it out?
how about carb jetting, does anyone have any experience with a similar setup? powervalves?
Iron heads, better be conservative on that total timing.
Myself, I always lock them out, anywhere from 28-34 depending on compression, boost, blower type.
I would think 30 total would be a close starting point. Shoot for around 10 lbs of boost
On carbs I dont really like power valves, I block them and up the mains 4, then add another 8-10% again to the mains
these are my opinions only from ones similar I've built and worked decent
If memory serves me right, bravo 1 1.36 28 pitch 4 blade 6000 rpms, pretty conserative yes,had 950 hp carbs. 900 hp will be tough w those heads, blower and carbs. locked out at 30 degrees, think that was w a regular hydraulic cam. Switched to a solid roller after a year or so but didnt put it back on the pump to check it.
Owner couldnt work on it himself so I built it around his skill level-(oil changes only)