I put the blower on because I was thinking that the turbo project wasn't going to get finished by the end of the season. I THOUGHT that the blower would bolt on and with a few jet changes I would be up and running. After I took it out 5 times each time the plugs were lean and each time I jetted it up. When I took it off, I had 108 jets in it and it was still lean (reading the plugs). The carbs are 1050 dominators. The setup at a light cruise would occasionally pop the blow off. I ran the timing between 32 and 38. The last time out I set the timing at 36, then while I was out I jacked it back and forth in small stages too far both ways.
It would idle fine.
Mashing it to rev it up fine. (occasionally popping the blow off)
Light cruise (84,85 jets popped bad, 95,96 rarely popped, 108,108 slight popping)
Full throttle (84,85 labored at top end, 95,96 ran good but still WAY short on power, 108,108 still WAY short on power)
Plugs showed lean each time. Each run I would full throttle for 1/2 mile then do a full throttle shutdown. Bowls were checked twice at the full throttle shut down and found to be full.
I believe the carbs are not getting enough signal to the boosters. They are not annular boosters. If I were to chase the problem I would change to carbs with annular boosters. If this setup is what I really wanted to run I would have continued to chase it, but it was supposed to be a quick fix to get the boat wet. It turned out to be a big waste of time.
I will entertain any ideas. But keep in mind;
It idled fine. (no vacuum leak)
The bowls were full after a long full throttle shutdown. (fuel pump and bowl levels are good)
Plugs are lean, all 8 are identical. (108 jets)
The metering blocks are supposedly limited to about a 102 jet.
I have built 7 blow through boost referenced carbs. I have had holleys from 600-950 on my car. I know my way around a Holley. I am not saying that I know everything, I am just saying that I am not new to tuning a Holley.
