38flatdeck

Has anybody used the new GM ZZ 572 crate motor in boat yet ? saw article in hotboat in a eliminator

Kidnova

I read the same article, and then posted a similar question on the other site {speedwake} about the ZZ572 and got no responses. I have a ZZ502 crate in my boat now and have had good luck with it so far, after about 80 hrs. Like you, wondering how the 572 would be...not for my present 23 ft. boat but possibly a bigger boat down the road.

Must be some kind of voodoo 'bout them GM crate motors no one likes to talk about ;o). Might be some clearence and cam issues?? Think the HB article said the guy had 50 hours on them with no issues......yet.

cooltoys61

Most people here seem to think auto motors are completely diff. I think if you get a "boat"(no reversion/proper torque range) cam in it and get enough cool oil through it the clearances are good enough. I have heard that since the jacket doesn't get hot like in an auto you might want a little more piston to cyl wall clearance. There are ample examples of "boat" motors going kaboom here but when a car motor fries in a boat people seem to think it's because of it being made for a car. Just be sure to take out the center bypass if it has one on the oil filter mount. BTW I am well aware there are lots of real experts here that know more than me but the only time I have fried an auto mtr in a boat, after about 6 of them, was when I cranked the timing tooooo far without my timing gun handy ,,duh. Just my .02

cooltoys61

Maybe people just feel better when they pay the upcharge for a "boat" motor?

paradigm shift

Big differance between a crate production motor and the ZZ572. The 572 is a HP - Race motor with proper set up for running hard. Just my O2.

I agree with cootoys on proper set up and cooling to keep em running strong. GM HP stuff is hard to beat for the price but again just my .02.

I have not tried one in the newer bigger boat yet but back in the day when we ran flaties the LS6 motor and if you were lucky enough to get yoru hands on an L88 or LS7 motor they ran very strong at the time. The 502-502 are in more boats than some think.

Kidnova

That could be.

My engine guy's business is a pretty even split between auto and boats. He builds awsome mills for his own dragsters. And does engine work for a lot of the local go fast boat guys. Some with pretty impressive big $ boats.

He doesn't seem to think there's much of a difference as far as the short block is concerned in an "off the shelf" engine. But I suppose if you're looking for optimal performance, or looking at an engine that will be run hard all of the time, rotaing assembley clearences would be an issue. In both marine and auto applications.

I run my ZZ at WOT only once and a while. And generally only for a few minutes at a time. Maybe that's why it's held together and stayed reliable. I suppose if I ran the snot out of it all the time it might be broken by now.

BTW, I don't know chitt compared to most of the OSOers. Like some others I'm here to learn. If I have a ?...I post it. And generally get good feed back.

230SX

I put one in in March. All I did was re cammed to a Crane 741 and used a Cloyes hex adjust timing set to set intake centerline to 112* as per some recommendations from some very knowledgeable people. There have been some people on other forums that have had problems with breaking valves but I think it was from the long duration stock cam causing reversion problems. I have about 60 hours on mine now. I may pull it this winter just to take a peek and see how everything looks. By the way I removed a ZZ502 with 225 hours to put this 572 in. It was still running great when I removed it.

born2burn

Is the 502 for sale or long gone?

230SX

Sorry, it now resides in a 69 Camaro

Kidnova

230SX, good to hear of the ZZ502's longevity.

I'm guessing you dropped in the 620 hp version? Glad to hear that's working out for you also.

Is there a web site where I can get specs on the 572? I'm able to get general info from the GM site and also Pace Performance. But no particulars on the cam and other internals.

Thanks