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Cam swap

Old 07-17-2021, 03:00 PM
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I just acquired a Baja 272 with a 454 blower motor. I know nothing about the engine but what I can tell is it has a weiand 177 blower. The cam sounds like itís a little bit more than standard but it certainly is not crazy. It has a 4150 Holley carb double pumper. Rockers are stock. I donít kNow about the Springs.I want to get this motor to have a high rpm at idle With that ratty tat exhaust. Not the lopey sound. It was suggested to me to use the crane cam 168741 but it has a lobe separation of 112degree. To me it doesnít seem like it would give me what I wanted. Donít ask me why I want it, I just want it. I donít usually drive over 30 or 35 miles an hour if thatís any help. I have the bravo one outdrive. It gives me goosebumps when I hear a boat motor that has a fast title and a ratty sound. Not knowing as much about camshaft I would like to hear what you guys have to say and any other recommendations. If the cam 168741 from crane is what I want, then let me know because Iím driving myself crazy.Thanks
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07-18-2021, 11:25 AM
sutphen 30
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your gonna need a 3/4 race cam to get that sick sounding bravo busting sound.
Old 07-17-2021, 04:39 PM
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So, if it has cast pistons/oval port heads/a crappy exhaust, that foesnít matter when picking a cam ?

Very good boat choice btw. Uktimate oerformance, no, but a great boat all around. :thunbs
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Old 07-17-2021, 07:03 PM
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Not to try and sway you but a bad cam is an easy way to make a fast boat slow .
check the thumper series cams from comp.
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Old 07-17-2021, 10:06 PM
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Thanks SB it’s just a cool boat to mess around with.
thanks car nuts X2. I know about the thumper but thumper is basically made just for the sound and Performance cut down. Right now I’m in the midst of trying to keep the power up and get that sound that I want because with the changing exhaust that’s going to help, the blower is going to help. If I can maintain that power and get my sound have a high rpm and that ratty tone, i’d be as happy as a man with a glass of wine sitting on top of the space needle. Trying to compromise all that is tricky but that’s why I don’t know if that MerCruiser525 race cam is going to do the trick as I mentioned the lobe separation being 112į. if they’re going to be wrong I want to make sure I know it
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Old 07-18-2021, 07:09 AM
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That fast idle that goes along with the aggressive camshaft will bang your drive apart going in gear and make the boat a pain to drive around docks/marinas/trailer loading. You got a blower motor sleeper, go dust some people and have fun.
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Old 07-18-2021, 08:37 AM
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Most of the bad ass sounding boat's have a well though out engine plan. They just don't throw a cam in them.
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Old 07-18-2021, 09:02 AM
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What exhaust does it have?
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Old 07-18-2021, 11:25 AM
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your gonna need a 3/4 race cam to get that sick sounding bravo busting sound.
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Old 07-18-2021, 11:25 AM
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Hi liberator, from what I gather the RPM really isnít that high but itís more of the sound in the exhaust that gives it that feeling. I have a brother one and right now the RPMs are at 800.No jerking just nice smooth transition into gear but I know what youíre saying.
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Old 07-18-2021, 11:31 AM
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Hey Payton, Iím changing from the stock exhaust to the Eddie manifold and stainless riser exhaust. I previously removed the baffles and added corsa tips. I was thinking over the evening that maybe because there is a slightly beefed up Cam that changing to this Eddie exhaust system may be enough to satisfy me but I doubt it. I have had many jet boats with Bassett exhaust and boy did we plan those engines out. I donít know if itís possible to do what I want with what I have and I would rather not have to go into the expense of redoing that whole engine. Thumper cam is good for that but itís also not good for power but then again my days of racing boats are over and I just putting around like a little 74 year old not going over 50. So thereís other things to think about.
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