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1972Challenger

  • Karma: +1/-0
Cammin my motor
« on: March 09, 2011, 06:45:04 pm »
im thinking about putting in a mild cam shaft... i got a Ford 390 with a Holley 650cfm carb.. what cam is good and should i even do it???

pros, cons... thanks
  • Boat #1: 1972 Challenger bubble deck
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crewchief22

  • Karma: +66/-0
Re: Cammin my motor
« Reply #1 on: March 09, 2011, 07:01:25 pm »
Depending on what has to be done to allow for a bigger cam you might look for someone selling a running 460 with all the hardware.

I would recommend talking to "LakesOnly" for quality Ford information.
  • Boat #1: '77 Hondo Pantera GT Jet
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"Racing is life!  Anything that happens before or after, is just waiting"    Steve McQueen

The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

IRRebel

  • Karma: +16/-0
Re: Cammin my motor
« Reply #2 on: March 09, 2011, 08:26:03 pm »
Depending on what has to be done to allow for a bigger cam you might look for someone selling a running 460 with all the hardware.

I would recommend talking to "LakesOnly" for quality Ford information.

X2...... And I'll get slammed sooner or later, but.........not to many 390 Jets out there........V-Drive maybe? "Mild Cam" is a relative term in this group.  a 305 Comp XM cam is a "mild" cam to many of these guys..............

Good engine, don't get me wrong!  :thumbup:  Problem is, these days, it's more scientific than just that. Obviously, cams and lifters need to  (should be) be changed together, but the springs need to be at spec for the cam as well, timing set, degreeing in........ In addition,depending how big you go, is there any machining needed to seat the springs, guide clearance,  pushrods, etc, etc. FE blocks is yet another i am not real familiar with. But I DO know for a fact they can run and run HARD against the bigger displacement boys!  ;)

Your 390 hardware should work just fine for a 428 as well. Both are rare enough these days, so I think you're better off dealing with the 390 myself. At the point of all this, a complete build would be in order , or just run it as it is until it breaks. That's what I'd do.... :thumbup:

Ray
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"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

enginedoctor

  • Karma: +7/-0
Re: Cammin my motor
« Reply #3 on: March 09, 2011, 10:00:20 pm »
Ray   :o
  • Boat #1: 1970 Horizon Cheby powered Jet
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1972Challenger

  • Karma: +1/-0
Re: Cammin my motor
« Reply #4 on: March 10, 2011, 07:43:40 am »
that sounds like alot of work.. but thanks for the info.. ill thnk about it
  • Boat #1: 1972 Challenger bubble deck
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LakesOnly

  • Karma: +15/-0
Re: Cammin my motor
« Reply #5 on: March 11, 2011, 07:48:44 am »
In my opinion if the engine is running fine then don't mess with it. If you want a little more power then perhaps try a larger carburetor and more timing which is a simple bolt-on deal as opposed to going into the engine for a camshaft swap.

Consider running the engine that way and enjoying your summer, and while enjoying your boat if you feel you need substantially more power start buidling up a newer engine design on the side, such a the 460. 450 hp is easy from a "smogger" 460 while using the OEM longblock for a mild rebuild, and it will be turn-key reliable as can be....while increasing power with the 390 takes more money and is technically less reliable (although this is not dramatically true at just 450 hp).

LO
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