blue thunder

Ecaleagle.. did Mr Policeman write you a nice citation? That would be insult to injury with the drive problem. No, I didn't see the Donzi, but I'll remember it next time... nice boat. I like the classics too. Keep in touch,

BT

jspeeddemon

BT- generally speaking increasing the number of the plugs is hotter heat range, and it is that way for a AC plug. Also the extended tip which you are using is better for staying clean. I ran R45XLS plugs in a 11:1 454 with no problem with detonation, and I would try a 46XLS in your motor. I feel real strongly that you have a fuel distribution problem between the intake and the head down to the valve.

blue thunder

Yeh JSpeed.. I'm betting on intake problem. I got the 44xls and 45xls to try. Will start with the 44 and if still rich go to the 45s. Hope I don't need to go all the way to 46, but will if necessary. If I can make a go of it through the summer, I'm going to pull both motors over the winter and make them right. If not, I'll need to buy two new intakes, install now and hope that fixes the problem. What do you all think of using oval port intakes on rectangle port heads? I hear this is great on boats because it give good runner mix velocity at the relatively low rpms a boat sees and boosts torque. I have Hi pro alum heads now.

BT