the new chevy big block

[tryan]

check this bad boy out. i'll get some specs friday.

[skinautique]

Definately get some more info. It looks sweet.

[882001]

it would look good in the 88. as long as someone else was paying for gas
will work for gas!

[tryan]

if you are going to go...........GO BIG...........



The new ZZ572/620 is built around an all-new Gen VI tall deck Bow Tie cylinder block. This all new race block is filled with a forged 4340 steel crankshaft with 4.375” stroke, shot peened forged 4340 H-beam rods, and forged aluminum pistons with full floating wrist pins. Plasma-moly rings are standard as is the screened and louvered windage tray. Hard core parts for hard core long term durability.
The redesigned rectangular port aluminum cylinder heads result in a pump gas friendly 9.6:1 compression ratio. A hydraulic roller cam with 0.632 inch lift actuates the stainless steel valves. And, of course, hardened chromemoly retainers, roller rocker arms, and dual valve springs are used to complete the valvetrain.
A new GM tall deck single plane intake manifold and 850 CFM Demon carburetor deliver enough air and fuel to make the 620 horsepower at 5,500 RPM and 650 ft. lbs. of torque at 4,500 RPM. Ignition is handled by a GM HEI distributor.
This impressive big-block engine is pump gas friendly, massive torque and horsepower, all from GM, the ZZ572/620 is for who consider excess to be barely enough and suitable for street/strip applications.
Finally released by GM but gone is the bright red paint and Chevy Bow Tie logo on the valve covers. In are traditional Chevy orange paint and 572 on the valve covers.

[Hollywood]

tryan, did you get that info from "The 700 Club" article in the January 2004 issue of PHR?

Here's what the guys did with the engine on the dyno (Westech's Superflow 901) at PHR: Set the advance to 35 degrees (specs call for between 34 and 36), bolted a pair of 2" hookers with 3.5" Dynomax Race Magnum muffs, and made 701 hp and 710 lb-ft of torque, all on 91 octane pump gas!

Other facts: There are 2 versions, a "street" and a "track" version. Both are 572ci. Both have roller cams (hydraulic in street, and solid in track). The street version (mentioned by tryan, and the one PHR dynoed), has 9.6:1 compression while the track version is 12:1. Both are equipped with 1.7:1 aluminum roller rockers, and call for 20W-50 oil (7 qt capacity).

I'll scan all the pictures from my issue and post them on Monday.


GMPP sets the claimed numbers lower so that everyone who buys one should make the claimed power and torque.

[Hollywood]

I scanned the entire article and it's on my website now.
http://tools.ecn.purdue.edu/~kfleisch/GMPP572.shtml