Rebuild Runs Rough

mderoy340 said
Mega squirt is not self learning, it is calculated using speed density. I am using The same maps as previous engine build. Only hard parts I’ve changed was the crank and crank bolts - I went to studs. Everything else is the same.
E85 requires more fuel than gasoline to make the same power.

I adjusted fuel for E85 by adding 30% and trimming it with afr gauge from there on.

TrailBeast said
Just off the top from the description of the issues with the advance it sounds like either cam timing is off or valve adjustment is too tight.

If there is a question about the ignition put your timing light on the coil wire and see if you have smooth consistent flashes or broken up flashes.

I put the cam in straight up and degreed it. I have a hydraulic roller, Hughes rockers and pushrods. I installed the rockers to spec, 2 turns of the adjuster on base circle. Geometry isn’t perfect but not too bad, I expect I’d only get 50,000 miles of service out of this engine. They’re magnum style rockers.

I’ll check out the coil wire with the light. Good tip, didn’t think of that.