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Originally Posted by glassdave
(Post 4058356)
you wont find much performance gains from drives or props without adding hp first. these are areas that are typically tuned to a specific engine. most bigger heavy V's run 1:50 drive ratios and thats most likely what you have. props, you have to play with but B1's are a good place to start unless you have an old school deeper X dim.
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should have been fine but I just cleared a few out anyway.
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Mechanic looked at it and said it had 454 stroked to 496's lol he must be able to see inside.....
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Originally Posted by 315duramax
(Post 4058292)
man, dont yall have jobs or something? you really have too much time on your hands...
and Griff, what about upgrading a carb/intake set up? or what drive/ratio/props could i expect to pick up a few MPH from? It will take 15-20hp per engine increases to see a 1mph gain Test the boat in the Spring and get accurate gps speeds and rpms and then talk to BBlades about having the props labbed. You have to have good baselines before you start changing stuff. |
If I'm not mistaken ,the old 420 mercs had just regular cast iron crap for exhaust. Good exhaust and a cam swap will wake up a 420. Preferably hydraulic roller with true headers
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35 Cig TRS with 420's will run 60-62 if engines run good....
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420's had Gil exhaust.
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The 420's i have seen had giant iron castings that flowed better but weighed a ton, this boat appears to have Stainless Marine castings.
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All great info. Thanks guys. I really want to do arnesons on this cause I haven't seen a cafe with surface drives before. Might be doing big motors in it but we'll see. I will be happy if I can get the boat to 65
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You want to put arneson's on a 60mph boat?
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