Notices

Cam swap

Thread Tools
 
Old 07-17-2021 | 03:00 PM
  #1  
Thread Starter
Registered
 
Joined: Dec 2019
Posts: 71
Likes: 1
Default Cam swap

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 it’s a little bit more than standard but it certainly is not crazy. It has a 4150 Holley carb double pumper. Rockers are stock. I don’t 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 doesn’t seem like it would give me what I wanted. Don’t ask me why I want it, I just want it. I don’t usually drive over 30 or 35 miles an hour if that’s 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 I’m driving myself crazy.Thanks
Jojoegen is offline  
Reply
Old 07-17-2021 | 04:39 PM
  #2  
SB
Registered
20 Year Member
 
Joined: Nov 2004
Posts: 14,068
Likes: 3,668
From: On A Dirt Floor
Default

So, if it has cast pistons/oval port heads/a crappy exhaust, that foesn’t matter when picking a cam ?

Very good boat choice btw. Uktimate oerformance, no, but a great boat all around. :thunbs
SB is offline  
Reply
Old 07-17-2021 | 07:03 PM
  #3  
Registered
 
Joined: Jan 2021
Posts: 309
Likes: 150
Default

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.
carnutsx2 is offline  
Reply
Old 07-17-2021 | 10:06 PM
  #4  
Thread Starter
Registered
 
Joined: Dec 2019
Posts: 71
Likes: 1
Default

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 112°. if they’re going to be wrong I want to make sure I know it
Jojoegen is offline  
Reply
Old 07-18-2021 | 07:09 AM
  #5  
Registered
15 Year Member
 
Joined: May 2009
Posts: 627
Likes: 408
From: Indiana
Default

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.
liberator221 is offline  
Reply
Old 07-18-2021 | 08:37 AM
  #6  
Registered
20 Year Member
 
Joined: Feb 2005
Posts: 570
Likes: 47
From: cincinnati,oh.
Default

Most of the bad ass sounding boat's have a well though out engine plan. They just don't throw a cam in them.
fbc25el is offline  
Reply
Old 07-18-2021 | 09:02 AM
  #7  
Payton's Avatar
Charter Member #927
 
Joined: Jan 2001
Posts: 4,834
Likes: 2
From: IN
Default

What exhaust does it have?
Payton is offline  
Reply
Old 07-18-2021 | 11:25 AM
  #8  
Registered
20 Year Member
 
Joined: Jan 2006
Posts: 3,598
Likes: 1,167
From: taxachusetts
Default

your gonna need a 3/4 race cam to get that sick sounding bravo busting sound.
Old 07-18-2021 | 11:25 AM
  #9  
Thread Starter
Registered
 
Joined: Dec 2019
Posts: 71
Likes: 1
Default

Hi liberator, from what I gather the RPM really isn’t that high but it’s 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 you’re saying.
Jojoegen is offline  
Reply
Old 07-18-2021 | 11:31 AM
  #10  
Thread Starter
Registered
 
Joined: Dec 2019
Posts: 71
Likes: 1
Default

Hey Payton, I’m 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 don’t know if it’s 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 it’s 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 there’s other things to think about.
Jojoegen is offline  
Reply


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.