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That`s another question. How far out should I pump the spring when filling. I didn`t know about the hole , thanks for the heads up.
It was great meeting your clan Steve and the `Vette was a rare beauty indeed. Thanks for making the effort. We are all still scratching our heads wondering what that big block will turn for numbers. Can you get wot or will it chine walk first?
Your stereo was LOUD, but that big block played a much sweeter song imo. What kinda cam and compression numbers are you runnin? Idled nicely and jumped on the cam going to the pin. Really sweet!
Sandy
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Thanks, I really enjoyed meeting you guys. I tried to keep my crew at bay. My friends wife likes to get a little tipsy and cut loose, she's a hoot when she gets that way. That's one reason why we left for a few hours, we went to one of those little islands by ourselves. She and my wife put in some boody shaking music and cut loose.
The Vette had a factory Mercruiser 420HP 454 in it when I got it. Make a long story short, that engine blew and I just threw together another one from various parts that I had lying around. As a result, this engine is stronger than the 420 was. So I'm purely guessing but I would say that it's making around 450-475 HP. With the 420, the boat would run about 54 mph, and with this engine it will run 58 mph. The boat is heavy and the drive is inefficient so that sort of has it limited to the MPH. I mainly wanted it to sound good, I'm not too concern with the speed. The engine is low compression (flat top pistons), around 8.5-8.75:1. The cam is a Ultradyne flat tappet hydraulic, lift = .550 intake and .575 exhaust. I think on the duration, intake = 231* @.050 and exhaust = 239* @.050, the lobe separation is @110*. The cam is supposed to be a re make of the first original Mercruiser 440HP 454 cam. The heads are from a 1969 396 casting # 148. They are the big oval ports with the semi open chamber. I had the heads shaved .040 and had them cut for the large valves which came out of the 420HP engine. It has a holley 800cfm double pumper carb from the 420HP engine. The intake manifold is a factory aluminum GM high rise dual plane with the brass in the water jackets for the salt H2O. The boat doesn't chime walk but it will get squirrelly in a little chop at speed.
