Gm Zz572
 

What does everyone think of GM's new Crate ZZ572 with 720HP?? What would it take to "Marinize" this motor? I am looking into either reuilding my MKIV 502 with upgrades or purchasing a new motor and this one is a possiblity. Thanks for any input good or bad.

I think it is high compression which means $3.00 gas. I run that type of fuel, but most want pump gas motors.

WETTE VETTE is right. The lower compression version of this engine might be a better choice. It will still blow the 502 into next week and is a very good engine, especially with a cam change.

I agree, but don't they offer a 650hp version with less cr? I'm pretty sure there are two versions, I remember reading something about this a few weeks back.

Try this;

http://www.sallee-chevrolet.com/Sneak/Previews.html

That looks like a nice piece. I would like to see more specifics on the cam profile. As was stated above, it looks like it may have to be changed.

Given the right exhaust system, I think that 9.6:1 motor would be a super NA boat motor. Nice tq motor. Do you guys agree?? I wonder what the tq curve looks like. From the outside it looks almost identical the 509 I built last year, but about 100 more hp and about 75 more ft lbs. (red and aluminum)

Anyone see a $$ tag. I think that would be a fantastic piece for someone who wants a turnkey pump gas 600+hp na motor with a warranty, assuming it actually makes that number. Conservative setup=less headaches. My dyno guy ran sweeps on a new 502/502 crate motor, and it made 501hp. So, I assume that 620hp rating is probably very close to 620. I'd like to see the tq curve though. My .02

That is a nice looking hunk of metal for a factory motor. I wonder if it will come with a warranty? It will be really interesting to see how the pricing is compared to Mercruisers prices. As stated, I am thinking the cam will need replaced.
tmthunder, If you bought this one, you would have a spare or you could sell your 502 to help offset the cost of the new motor.

28 Eliminator,
I would most likely hang on to the 502 for a while to make sure that the new motor holds up but then sell it. Not really sure what I am going to do yet. If I do get one of the 572's I will definetly post numbers and pics!!

anyone get pricing on them yet?

Don't quote me on this, but I saw this motor on either trucks or hp tv, I believe the price for the 572 was 8000 for the long block.

The only thing that would bother me about this motor is the aluminum heads. Unless you used it in a fresh water cooling setup would'nt you run into issues with corrosion.

As far as cam profile, going by the numbers provided of 650 ft lbs at 4500 and wot at 5500 I would think the the motor would be a great fit for marine use with the cam that is in it. Obviously you can't tell for sure unless you see the whole provile, but with 572 cubic inches I would be suprised if it has a narrow power band.

we have 572 built and ready to drop in your boat.call for details1-847-344-8928