572 cu. in Crate Engines

[Tom Bryant]

GM is set to release 2 new crate engines. Both sporting 572 inches. The ZZ572/620 is 620 hp@5500 rpm and 650 lb-ft of torque@4500rpm. It has 9.6:1 compression ratio so will run on pump gas and has a 6000 rpm redline with it's hyd roller cam and Holley 4150 850cfm carb.

The ZZ572/720R is 720 hp@6250 rpm and 685 lb-ft of torque @4500 rpm. It is a 12:1 compression ratio which will obviously require race fuel and redlines at 6750 rpm with it's mechanical lifter roller cam and 4500 Dominator type 1096 cfm carb.

Both engines use the new tall deck Gen VI block with a deck height of 10.200 as compared to the 9.800 deck height of the standard block. The taller deck height is to clear the 4.375" stroke forged crank with long H beam rods and 4.560 bore forged pistons. Unlike the 502's oval port heads the 572 gets big rectangular ports with 118cc chambers and 2.25 intake/1.88 exhaust valves. They use stock ratio (1.7) roller rockers.

Their horsepower figures are actually fairly mild for the size of these monsters so there is a lot of room to build. Part numbers and prices have not yet been released.

See the January issue of Hot Rod Magazine for more details.

Tom

 

[Ken]

Finally gettin' around to reading it, eh Tom? :L

_ken

 

[Tom Bryant]

I just got it yesterday. The pony express horses get tred by the time they get this far out in the sticks. How many days sooner do you west coast guys get your Primedia publications?

Tom

 

[Ken]

I dunno, but tonight in the Solid Axle Lounge, Black Thunder said he had the February issue of Vette magazine already, and he's in Florida I believe. (Vette is published here on the west coast.)

The reason it came up was due to the fact that he said Chris' Killer Shark was pictured on page 68. Be on the lookout for it!

_ken

 

[Tom Bryant]

I'll have to watch for that one.

 

[Tom73]

Nice looking engine:

Read all about it here on the Sallee Chevy site: http://www.sallee-chevrolet.com/Sneak/Previews.html

tom...

 

[corvettecrazy]

anyone know if a price has been relased on these beasts yet?

 

[Tom Bryant]

The last I read no part number has been released yet. So we waite.:eyerole

Tom

 

[Bob_K]

Hmmm, comes out to 9.3 Liters or so. Wonder if it can be bored or stroked to a 10L just to say it's been done =)

 

[Stallion]

Wow!! :eek I would definitely put this engine in a Shark. That is great. And like you said, definitely a lot to be able to work off of with that kind of engine.

How can GM put out such a powerful engine? Especially the 620 which only needs to run off of pump gas.

 

[JohnZ]

BIG cubes, low compression, and BIG price ($20K) :eek

 

[Stallion]

Why low compression?

 

[Tom Bryant]

Pump gas friendly.

 

[corvettecrazy]

Why low compression?

pump gas friendly but that leaves plenty of room for adding forced injection (supercharger)

 

[Tom Bryant]

Exactly.

 

[mcditalia]

JEEEZ,

I thought I got the bug out of me when I saw these 2 crate motors advertised in a Jegs catalog a while ago and I was thinking of a second mortgage, anything to get a hold of one. Then, common sense (Read: no money) kicked in and went about my business, until you guys have to rehash the 572 fantasies!

I think I'll call my bank tomorrow and beg :eyerole

I need 620 HP under the hood of my third gen f-body in need of a rebuild. Anyone see the highly limited ZL1 all aluminum crate motor?

 

[Stallion]

How low is this low compression though? You can still throw in 12:1 easily with pump gas with no problem. And that's not a low CR. And if you want to supercharge, just do a couple of simple mods. Heads, pistons, gaskets...

Stallion

 

[corvettecrazy]

i dont think with that motor pistons heads and gaskets would need to be replaced if you were going to throw a big blower ontop of it

 

[Stallion]

Well, if they would have just started at a decent CR with that engine, anybody that would think of getting more power out with a blower would be able to do the mods. No big deal. But if you do want to keep the crate stock as it is, why not start with the higher CR. It's all on point of view...

Stallion

 

[Last Ride]

Well, if they would have just started at a decent CR with that engine, anybody that would think of getting more power out with a blower would be able to do the mods. No big deal. But if you do want to keep the crate stock as it is, why not start with the higher CR. It's all on point of view...

Stallion

I might be wrong here, but I thought you couldn't run as high compression on a big block as you could, say, with a small block. Lingenfelter builds 11:1 compression LTx motors that are fine on pump gas, but most of the big block I have seen run between 9:1 and 10:1 and still use premium unleaded. Not sure why this is, just my observation.