MESABALANCING

I'm glad the info helped sometimes one gets tunnel vission in one direction and the simple things get you. As far as the BSFC you should be in the mid 40's to low 50's and the ratio should be in the 12.1 in the torque range and 13.1 in the top if you can get it. By the way have you delt with Drew in WA he's supposed to be real good I met him at the boat show in Feb and he seemed knowledgeable maybe he can help. Good luck nice to hear from you Laz Mesa

2112

Thanks Laz;

Yes I know Drew very well. He is the original builder of these motors. He too suggested higher BFSC #s but thought the velocity stack on the dyno may be part of the problem.

I forgot to run the motors with the flame arrestors on, I was too wound up with other issues as they were on the dyno. As we up sized the main jets, after 98s, we started to fall off in power, That is why I think I need an expertly tuned carb, Preferably marinized.

2112

Just had an interesting conversation with Nickerson Carbs. From that discussion;

1) There is no such thing as a "sealed throttle shaft". It simply does not exist. If you have one, let the alcohol guys know about it, they would love to solve that dilemma.

2) The j tube is a Holley invention for marine carbs. The USCG has absolutely no requirement for these. They are more concerned about flame arrestors and SS braided lines.

For what it is worth.