543 0R 505

oldkimmer said
I got a couple of friends that feel my Indy SR heads (flow 350/250)will be more at home on the 505. They don’t think they are up to the task of feeding the 543. I do have a Super Victor and a 1250 Dominator to top them off. Both would be using the same roller cam. Comp 275/[email protected] 108 .625 lift. I do have 1.6 rockers also. 543 will be 11-1. 505 12-1 Compression 543 uses external oiling. 505 internal oiling. What does the FABO crowd think? This is for bracket racing. I will need to use a 4.5 gasket to clear the combustion chambers in the SR heads. Thanks. Kim

Is there a differance in crank quality between the two? I would go with the better one if so, if not, 543. I like the bigger motor because it will be making max hp earlier. If you have great traction then consistancy will be a touch better due to the lower rpm power. It will also be faster. 38 cubes and a full point compression means a lot.