[Question] Hey gn7... Question for you...
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Hey gn7... Question for you...

  1. #1
    "BOUGHT NOT BUILT" 2FORCEFULL's Avatar
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    Default Hey gn7... Question for you...

    HERE'S the deal,...merc 500 hp motor... stock lifters... I have two (#5#7) exhaust lifters that are stuck pumped up..??? I have never had this happen after the motor has set...I have seen colapsed ones that won't pump.. I have seen pumped that won't colapse while running, or float...

    what would cause this???... I'm gonna change them...I wanted to ask what you think I should get???


    I did a leak down...3%... and compression was @ 150-155 on all cylinders...


    only thing I did was run lucus gas treatment in the fuel...none in the oil????

    thanks for your reply...

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    "BOUGHT NOT BUILT" 2FORCEFULL's Avatar
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    Oh, and one more question.. anyone know what roller lifters merc used on the 96 500hp??

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    "BOUGHT NOT BUILT" 2FORCEFULL's Avatar
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    The HP500 continues to provide flawless performance as the exclusive power of the APBA's exciting Factory V-Bottom Series. The ensemble of a hydraulic roller camshaft, Dart single plane intake manifold and Holley 800 CFM carburetor give the HP500 its renowned performance characteristics: ultra-smooth idling, instant throttle response, and unprecedented reliability. Both engines are available with 1.36:1 or 1.50:1 gear ratio Bravo One Drive or Bravo One Performance Drive options in either right-hand or left-hand rotation and are backed by a one-year limited warranty and a three-year limited corrosion warranty.



    HP500 Specifications :
    Propshaft Horsepower: 470/350
    Displacement (Liter/CID): 8.2/502
    Cylinders: V-8
    Bore (in/mm): 4.47/113
    Stroke (in/mm): 4.00/102
    Compression Ratio: 8.75:1
    Fuel Requirements: 87 Posted Octane (R+M)/2
    Full Throttle RPM Range: 4800-5200
    Ignition Type: Thunderbolt V
    Alternator (amps/watts): 55/776
    Length (in/mm): 38.3125 /973
    Width (in/mm): 32.75/832
    Height (in/mm): 23.5/597
    Weight (lbs/kg): 1305/592
    Warranty: 1-year limited, 3-year limited corrosion


    HP500EFI Specifications

    Propshaft Horsepower: 470/350
    Displacement (Liter/CID): 8.2/502
    Cylinders: V-8
    Bore (in/mm): 4.47/113
    Stroke (in/mm): 4.00/102
    Compression Ratio: 8.75:1
    Fuel Requirements: 87 Posted Octane (R+M)/2
    Full Throttle RPM Range: 4800-5200
    Ignition Type: Digital
    Alternator (amps/watts): 60/847
    Length (in/mm): 34.3125/872
    Width (in/mm): 33.75/857
    Height (in/mm): 22.0625/560
    Weight (lbs/kg): 1305/592
    Warranty: 1-year limited, 3-year limited corrosion

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    Senior Member lbhsbz's Avatar
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    If the lifters are stuck in the pumped up position, how did the valves close to give you those compression and leakdown numbers?
    GN7: "If you were to have ever had two brain cells you could rub together and make heat, you be dangerous"

  7. #5
    "BOUGHT NOT BUILT" 2FORCEFULL's Avatar
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    Quote Originally Posted by lbhsbz View Post
    If the lifters are stuck in the pumped up position, how did the valves close to give you those compression and leakdown numbers?
    I think it makes them 1/2 turn tight, the compression test was done with the valves loose to where you could spin the push rod with your fingers... with them tight I lost power, the reason for pulling the valve covers..
    ..I was looking for a couple that were too tight so what I did was back the nut off to zero and count the turn..5/8 is what the setting is.
    Last edited by 2FORCEFULL; 07-30-2012 at 09:32 AM.

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    Quote Originally Posted by 2FORCEFULL View Post
    Oh, and one more question.. anyone know what roller lifters merc used on the 96 500hp??
    they were crane, which was bought by S&S

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    Senior Member wagspe208's Avatar
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    add some zinc
    Wags

  10. #8
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    Confirm they were Cranes.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

  11. #9
    gn7
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    Quote Originally Posted by 2FORCEFULL View Post
    HERE'S the deal,...merc 500 hp motor... stock lifters... I have two (#5#7) exhaust lifters that are stuck pumped up..??? I have never had this happen after the motor has set...I have seen colapsed ones that won't pump.. I have seen pumped that won't colapse while running, or float...

    what would cause this???... I'm gonna change them...I wanted to ask what you think I should get???


    I did a leak down...3%... and compression was @ 150-155 on all cylinders...


    only thing I did was run lucus gas treatment in the fuel...none in the oil????

    thanks for your reply...
    I thought I had you on ignore after your last whiney episode.



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  12. #10
    Senior Member EdonShano's Avatar
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    You must be feeling better.
    Formally know as UNFORGIVEN...

  13. #11
    gn7
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    About 99% back to full fledge OPINIONATED asshole. Thanks for asking
    I understand the engine project is in your court. Whats the hold up? Your burning summertime weather here!



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    Last edited by gn7; 07-30-2012 at 06:16 PM.

  14. #12
    Senior Member EdonShano's Avatar
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    Quote Originally Posted by gn7 View Post
    About 99% back to full fledge OPINIONATED asshole. Thanks for asking
    I understand the engine project is in your court. Whats the hold up? Your burning summertime weather here!
    Holdup??? your right, it's in my court now..so MY NEXT VACATION is in end of August... that should give me enough to finish up and dyno..I still have to take Shannon to the lake on weekends..so that cuts into motor time..no Rush though...I'm stll cleaning/wiping off fingerprints from Steelcomp...you could see where I pried the motor out of his hands...I talked to him today..he sounded a bit depressed...you think he's missing MY motor?????
    Formally know as UNFORGIVEN...

  15. #13
    "BOUGHT NOT BUILT" 2FORCEFULL's Avatar
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    Quote Originally Posted by cstraub View Post
    Confirm they were Cranes.
    yep, cranes, gonna put a new set in and call it a day...motor has 238 hrs and the wheels on the lifters are sloppy

    .. glad they didn't start spitt'n needle bearings

  16. #14
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    Quote Originally Posted by gn7 View Post
    I thought I had you on ignore after your last whiney episode.
    I figured as much..

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