TWiTCHAKA

  • Karma: +0/-0
Re: 460 rpm limited
« Reply #25 on: April 02, 2013, 12:22:10 PM »
Hey I have the same issue I have a 73 biesemeyer 22.6ft cruiser and i know its a heavy b!tch but in the water I can only get the boat up to 3000rpm an running about 40mph with bimini up. Out of the water I can get it way past 3000 the motor is a 455 with about 35 hrs on a rebuild but unsure of the mantaince.  jet is a 12 jc berkley. I have a 8867 1406 weber 4 barrel unsure of the cfm but but I think 650?

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SoCalPSD

  • Karma: +4/-0
Re: 460 rpm limited
« Reply #26 on: April 02, 2013, 12:32:55 PM »
May be a fuel delivery issue, what fuel pump you running
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In my best "grandad" voice with a cigarette hanging out of my mouth....  "if a day goes by and you learn nothing, I hope like hell you got a lot of sleep".... :thumbup:

jet fever

  • Karma: +7/-2
Re: 460 rpm limited
« Reply #27 on: April 02, 2013, 12:55:58 PM »
Yes Holley needs at least 6 psi
  • Boat #1: 76 Hallett Bubble Deck
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TWiTCHAKA

  • Karma: +0/-0
Re: 460 rpm limited
« Reply #28 on: April 02, 2013, 02:51:49 PM »
If that was towards me I have no clue lol just got the boat last season I will check on it tonight

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Vegas

  • Karma: +1/-0
Re: 460 rpm limited
« Reply #29 on: April 02, 2013, 07:48:41 PM »
So I hooked up the tach attachment on the multimeter and when I am at 2900 rpms the tach is off because I am hitting around 4200 rpm.  I installed the new fuel lines so hopefully when I get to the water I can get a few more rpms.  I will also see if I can check my fuel pressure coming out of the pump and see what it is at.  I want 55!!!  I appreciate all the input people.  I am going to double check the output specs of the dizzy and maybe resend the tach back to autometer for a replacement.
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jet fever

  • Karma: +7/-2
Re: 460 rpm limited
« Reply #30 on: April 02, 2013, 08:58:29 PM »
Sweet now hopefully u have that 6 PS I of fuel going to that Holley
  • Boat #1: 76 Hallett Bubble Deck
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Vegas

  • Karma: +1/-0
Re: 460 rpm limited
« Reply #31 on: April 02, 2013, 09:24:27 PM »
Yeah hopefully I get some time tomorrow to check it out.  Does anyone have any suggestions for which timing springs to use in my MSD?  I have the fast ones in now, thinking about going for the middle ones to see if it makes any more difference for cruising speeds.
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quick olds

  • Karma: +3/-0
Re: 460 rpm limited
« Reply #32 on: April 02, 2013, 09:29:46 PM »
If ur on it and it starts to lose power sounds like a fuel delivery prob pump not keepin up or the floats not adjusted or needle and seat not opening all the way for what ever reason

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Vegas

  • Karma: +1/-0
Re: 460 rpm limited
« Reply #33 on: April 04, 2013, 08:03:54 PM »
So I checked today, and I have 6 psi coming out of the pump when I disocnnect the ignition and crank it.  I decided to pull the stone filter off of y carb, and there was little pieces of stuff that almost looked like sand in it, I think it came from corrosion inside my stainless braided line form the pump to the carb.  I hit it all out and ran some carb cleaner and an air hose through the line.  Maybe that was my problem, it wasn't allowing full fuel flow at WOT.  opinions?
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quick olds

  • Karma: +3/-0
Re: 460 rpm limited
« Reply #34 on: April 04, 2013, 08:24:51 PM »
Could be run it and see hook up a pressure guage abd have some one watch it while ur running

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jonnygarcia

  • Karma: +0/-0
Re: 460 rpm limited
« Reply #35 on: April 05, 2013, 03:53:59 AM »
Haha i did this last year with my boat! I only hit 3000 with my 460 and could not figure out why!? Its just your tach, its on the wrong setting.. now im at around 4500 r's. Chech the back of your tach (:

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