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  1. #11
    Registered BRUCE SEROFF's Avatar
    Join Date
    Aug 2001
    Edison, NJ, USA

    Re: New GM Engine???

    Quote Originally Posted by Ron P
    And a Merc 525 is HOW MUCH?????

  2. #12
    Registered Gold Member DoTheMath's Avatar
    Join Date
    May 2002
    Ma. / Lake Winni., NH

    Re: New GM Engine???

    So, for you engine guys - what would it take to "marinize" something like that, and would it be worth it?

  3. #13
    Platinum Member Platinum Member CigDaze's Avatar
    My Boats:
    Cigarette 35 Cafe Racer
    Join Date
    Jun 2001
    St. Petersburg, FL

    Re: New GM Engine???

    Quote Originally Posted by Stormrider
    Don't let merc get their hands on it!!!
    I won't pay $200k per side!

    No chit!

  4. #14
    Registered BRUCE SEROFF's Avatar
    Join Date
    Aug 2001
    Edison, NJ, USA

    Re: New GM Engine???

    heres a thread started some time ago

    Zz 572

  5. #15
    GLH is offline
    Platinum Member Platinum Member GLH's Avatar
    My Boats:
    Join Date
    Dec 2002
    Burlington, VT

    Re: New GM Engine???

    Talked about a lot here;
    Zz 572
    Car desighed engines in boats are not always good... B4M made the good point as follows in this thread.

    Quote Originally Posted by Back4More
    Blocks run colder and pistons run hotter....and with a blower on top even hotter.
    More clearance between piston and cylinder...ring ends get more clearance too
    Blower pistons are a must with that much power expected out of it...and a high quality set of rings too.
    More clearance in the rod bearings for oil flow to remove heat from the bearings.
    Re balancing the rotating assy...If its anything like the ZZ502 it will rattle it's self to death in no time.
    If your looking for a 1000hp blower motor you better plunk down the cash for top of the line internals...not to mention a beefy aftermarket block...There is no such thing as a cheap marine blower motor making 700+hp.
    I not slamming this bad assed crate motor, but it is not for powerboats...I read alot about people blowing up the 502s running them at the track.
    I know nothing about detailed marine engine building but learned a bit while having mine built.

    Oh, and we did'nt even talk cams and valve train yet....

  6. #16
    VIP Member VIP Member Back4More's Avatar
    My Boats:
    353 Fastech
    Join Date
    Feb 2002
    Lake Michigan

    Re: New GM Engine???

    That was me? Sounds like my pre-40's cocky-ness. I think someone wanted to drop a blower on the 600hp lower cr one in that thread.

  7. #17
    AT Cult Member #3 VIP Member R Addiction's Avatar
    My Boats:
    '99 Active Thunder Tantrum
    Join Date
    Oct 2000

    Re: New GM Engine???

    Apple Chevrolet in York , Pa has 1 in stock

    The Deluxe version of the ZZ572/720R starts with the Base ZZ572/720R engine and adds the new tall deck single plane intake manifold and 1090 CFM King Demon carburetor delivers enough air and fuel to make 720 hp and 685 lb-ft of torque. The Deluxe 572 also includes the dip stick, dip stick tube, water pump and Distributor.

    Technical Notes: ZZ 572/720R Deluxe Technical Information
    Horsepower 720 @ 6250 RPM
    Torque 685 Ft. Lbs. @ 4500 RPM
    Max. Recommended RPM 6750 RPM
    Compression Ratio 12:1
    Partial Engine 12498825
    Block 25534368 Tall Deck
    Bearing Kit, Main 88962212
    Bearing Kit, Camshaft 12499434
    Crankshaft 88961554 Forged 4340 Steel
    Connecting Rod 88962926 Forged 4340 Steel
    Bearing Kit, Connecting Rod 88961556
    Piston & Pin 88963227 Forged Aluminum
    Piston Ring 12499212 Plasma-moly
    Camshaft 88962216 Mechanical roller
    Balancer 88962814 SFI Approved
    Cylinder Head 88961160 Aluminum
    Gasket, Head 88961561
    Rocker Covers, pair 12499200 "572"
    Valve, Intake 12366987 2.25" Stainless steel
    Valve, Exhaust 88963128 1.88" Stainless steel
    Valve, Spring 88963933 Dual
    Valve, Retainer 12366990 Chrome moly steel
    Key, Valve Retainer 12366992
    Shim, Valve Spring .88963937
    Rocker Arm 12361323 Roller 1.7:1
    Lifters 88962920 Roller
    Push Rod, Intake 88962284 High performance one piece
    Push Rod, Exhaust 88962283 High performance one piece
    Oil Pan 10240721
    Windage Tray, Oil 88962187
    Gasket, Oil Pan 10106407
    Oil Pump 88963707
    Spark Plug 5613100 - R42XLS

    The following items are included in the ZZ 572/7R20 HP Deluxe Engine Package
    Water Pump 14058915 Aluminum Short
    Carburetor 88962217 1090 CFM King Demon
    Distributor 10093387 Multiple Spark Discharge
    Manifold, Intake 88962218
    Gasket, Intake 88962213
    Wires, Spark Plugs 12499211
    Ignition Timing 36 total advance
    Fuel Race Fuel

    [SIZE=3]List price..........$18321.00[/SIZE]

  8. #18
    JC Performance Engines Gold Member Stormrider's Avatar
    My Boats:
    2003 28 Pantera
    Join Date
    Jul 2002
    Long Island, NY

    Re: New GM Engine???

    Stainless exhaust valves??? No inconel???
    With great power, comes great responsibility.

  9. #19
    Registered robyw1's Avatar
    My Boats:
    1998 Wellcraft 22' Scarab
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    Jul 2003
    Spring, TX

    Re: New GM Engine???

    Quote Originally Posted by GLH
    Talked about a lot here;
    Zz 572
    Car desighed engines in boats are not always good... B4M made the good point as follows in this thread.
    well as you saw in the video they ran it on the dyno overnight. For most applications this engine makes enough power w/o the blower.


  10. #20
    Platinum Member Platinum Member cig1988's Avatar
    My Boats:
    1988 Bullet FOR SALE
    Join Date
    Nov 2002

    Re: New GM Engine???

    12:1 compression? Wonder how it would run with marina gas

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