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New GM Engine???

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Old 01-18-2005, 02:13 PM
  #11
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Default Re: New GM Engine???

Quote:
Originally Posted by Ron P
And a Merc 525 is HOW MUCH?????
$26k
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Old 01-18-2005, 02:21 PM
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Default Re: New GM Engine???

So, for you engine guys - what would it take to "marinize" something like that, and would it be worth it?
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Old 01-18-2005, 02:27 PM
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Default 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!
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Old 01-18-2005, 02:36 PM
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Default Re: New GM Engine???

heres a thread started some time ago

http://www.offshoreonly.com/forums/s...ad.php?t=61488
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Old 01-18-2005, 02:36 PM
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Default Re: New GM Engine???

Talked about a lot here;
http://www.offshoreonly.com/forums/s...ad.php?t=61488
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....
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Old 01-18-2005, 02:51 PM
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Default 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.
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Old 01-18-2005, 02:53 PM
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Default 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


List price..........$18321.00
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Old 01-18-2005, 03:11 PM
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Default Re: New GM Engine???

Stainless exhaust valves??? No inconel???
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Old 01-18-2005, 03:57 PM
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Default Re: New GM Engine???

Quote:
Originally Posted by GLH
Talked about a lot here;
http://www.offshoreonly.com/forums/s...ad.php?t=61488
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.

Roby
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Old 01-18-2005, 04:14 PM
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Default Re: New GM Engine???

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