Ratchet

This came up before, and it looks like the price is out. Check this out:

http://www.paceparts.com/product.asp?3=180219

Just some info.

RJ

Vinny P

I have been thinking about this motor since I first heard of it several months ago. The problems I see with it are that it is not a marine motor. You have to pay for a carb and distributor you can't use.. If you have salt water in the motor, you can't use the head gaskets at all. I would be leary about the heads themselves unless you can flush it out everytime you use it. The other question I have is regarding the cam profile. The listing says 632/632 lift, 254/264 duration @ .050 but what about the lobe seperation and centerline? I have a friend who works at a GM dealer, I just talked to him today about attemtping to find out more information. I will post it when and if I get it..

What do you guys think?

later

the information states it will be available as a short block assembly. so that elimanates the heads, carb and headgasket issues, the cam easily changed at this phase. i to have been watch and waiting i work at a gm dealer and have been inquiring for months. not alot of information yet
later

Vinny P

Later,

I have not seen anything regarding a short block 572. Do you have a GM part # or any other information?

Back4More

It's probably the best thing that came out of GMPP in a long time, but at $12K+tax and shipping...you could build much better for the same or little more.
The block is already at .060 over...Whats up with that?
Thats 6-7 seasons or 2 rebuilds off its service life.
And the power output is not all that much... remember that it has to be spun at about 5400 for marine useage with a reversion free hyd roller cam...add $ there.
Don't get me wrong its not that im flaming this motor its just not for powerboats.


Specs,

Horsepower……………………………………620 @ 5500 RPM
Torque………………………………………………650 Ft. Lbs. @ 4500 RPM
Max. Recommended RPM…………6000 RPM
Compression Ratio…………………9.6:1
Block…………………………………………………New! Sportsman Tall Deck Bowtie Gen VI
10.200" deck height
Bore……………………………………………………4.560"
Stroke………………………………………………4.375"
Crankshaft……………………………………Forged 4340 steel
Connecting Rods………………………Forged 4340 steel, H-beam style, Shot peened
Pistons……………………………………………Forged aluminum, Full floating wrist pin
Piston Rings………………………………Plasma-moly rings
Camshaft…………………………………………Hydraulic roller
Valve lift: .632" I, .632" E
Duration @ .050" 254Ί I, 264Ί E
Lifters……………………………………………Hydraulic roller tappet
Cylinder Heads…………………………Aluminum rectangular port
118cc combustion chamber
Intake Valves……………………………2.25" Stainless steel
Exhaust Valves…………………………1.88" Stainless steel
Valve Springs……………………………Dual valve springs
1.540" coil diameter
1.800" installed height
197 Lbs. seat pressure
Spring Retainers……………………Hardened chromemoly steel
Rocker Arms…………………………………Aluminum roller rockers, 1.7:1 ratio
Push Rods………………………………………High performance one piece
Intake Manifold………………………New! Aluminum tall deck single plane
4150 series carburetor
Carburetor……………………………………850cfm, mechanical secondary
Rear Main Seal…………………………New! One-piece design
Windage Tray………………………………New! Screened and louvered
Damper………………………………………………High RPM torsional damper
Distributor…………………………………H.E.I.
Ignition Timing………………………36Ί total advance
Spark Plugs…………………………………R42XLS
Fuel……………………………………………………92 Octane

PatriYacht

I bet the cam is this one. Crane

Ratchet

I's like to see this as a short block..............I think that adding the right heads / cam / intake, you could get up to 700 HP, naturally aspirated.

later

pace parts show the part #'s at

complete deluxe motor #12498793
long block #12498792
partial #12499190

at this time those are not good part #'s ive already checked. the last i heard they were still in the testing stage with the motors that was a couple months ago. but this is the first time ive seen Part #'s so ill be check it out from time to time.

Back4more i agree with you that you could have one built for that money, i can buy for cost and thats what im looking at.

later

Dennis Moore

A short block without a camshaft would be the hot setup! GM could sell alot of them.

Except for the camshaft, I like the long block engine for marine use.

If only I could afford to lay out the cash and not feel guilty about it!

jspeeddemon

Go to racingjunk.com and see the classifieds for engines and components. There are a lot of top notch parts that can be had for $12,000.00. probably $4500.00 for a short block, $3000.00 for CNC heads, $800.00 for roller cma, $350 for intake, $400 oil pan, $500 for pushrods and misc. and you still have $3000.00 left over. someone would probably assemble this and test it for $1000.00. Use the extra money to buy some good exhaust and you'll run away and hide from the GM motor with the extra 100 hp. I know exactly about a setup like this, with Canfield 310 heads the motor made 755 hp@5800, at 9.5:1, torque was amazing from 3000 up. As a matter of fact that motor is for sale with headers, intake to pan for $16,500.00 including a set of GIL big guns, all billet 4340, dyno time only. Boat was sold before installation.