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Looking for a little help from someone who has gone through the riggers of choosing a cam for a chevy 327ci with a berkeley pump. Motor is being freshend right now and I have yet to pick a cam. The hull is 16' long, kinda of a semi v, and is pretty light ( don't know exact weight). Currently, the boat really goes out of the hole but not much for top end. Block is an older casting with the double hump heads (291s) with a little port work. I had the pump rebuilt and the impeller cut to a B. Motor has the through the transom exhaust. Currently has the stock (old school) 4b intake with a holley 650 dbl pmp. Motor currently max's at 5200 rpm with a top speed of 54mph ( down river http://free.***boat.net/ubb/biggrin.gif ). By the way, Mooneyes is sending the spec sheet on the cam that I am replacing ( they said it is a 1968 grind). Obviously, that will help with choosing the replacement. Thanks in advance for your time...
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This might be a tricky one but if i were putting a small block in a boat(have done a few car motors)I would probably go with a 220-225@50 with a 450-460 lift for a hydraulic type cam.This kind of cam should be good for a decent rpm and will still have the torque to rev.Normally i'd use 234@50 488-510 lift for hot street motors in a car.
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327, what kind of boat do you have? I have an old Glastron with a 327 w/ 12jb-b pump. Its about ready for the water as I've been rebuilding it for the last 9mos. As for the cam, I left mine stock oe. If your in for an after market cam there are lots to choose from. I personally like Isky. Their staff are super to talk to. They ask you more questions about your application than you can think of. They do a good job at nailing down the right cam.
What ever you choose, let me know how it works...I might want to change mine. LDFTRBT
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It's an old Cheetah hull (1968). It's only 16'and with the cam I am replacing she get's out of the hole quickly ( no top end though). I am hoping to get the spec's on the cam that was in the motor today. I do know a little about it. 228 degrees duration @ 0.50/ 280 advertised. Gross lift at 410/ 111 degree lobe. I am thinking that with the boat being so small I can get out of the hole quickly even with a cam set up more for top end hp. Sure be nice to stab the right one on the 1st try.........
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on my ski boat, I have a 350 in a v-drive. the motor is stock except for cam & valve train, holly 4 barrel, single plane intake, mallory unilite ign. The cam I chose is a .480 lift / 292 total duration (comp cams kit @ summit for like $280). makes for a little rumble idle and pulls real hard (torquy) from 2k - 6k. BIG improvement over stock. I've heard that stock heads wont flow anymore than a 440 lift, but the duration really helps (1.94; 1.50 valves). I've had SBC's in all of my boats (4 flatbottom v-drives) and they run real well.
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Going with a custom grind... Looking forward to it....Will post specs soon for the smallblocker clan......
