New engine build thoughts

gumper said

I haven’t been using a bypass since the engine rarely went over 6200. Probably will be using one this year though. Was running 29 nozzle jets with an 82 pill. I put my nozzles about an inch above the end of the intake runner per their instructions. It’s just a Weiand Xcellerator intake I did a port match job on. I have my doubts that a high rise intake like a Victor would change much since it’s already spraying fuel directly on the valves.

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If you are using the Ron’s barrel valve, they should have a 2-3 pound spring in there. Mine was shipped with out one, and it was a royal beeeeeeotch to start hot. I figured it out when I had to rebuild the barrel valve and I was making my own valves. Without some pressure restriction, they don’t start well hot, and they idle dirty. Well, dirtier that they should.

I ditched most of the Ron’s stuff, switched to a Kinsler quick change main jet can and that’s where the idle spring was. I ended up at 18 PSI in the idle check, 80 PSI at the nozzles at 8500 RPM and I opened the high speed at 62 pounds.

I should have added another bypass. Then I’d have opened the high speed at about 50 pounds and the pump loop (which I hate calling it because I was never fond of adding fuel back into the inlet of the fuel pump but that’s what everyone else calls it) would have opened at about 70 pounds.