“Lets Go Racing.”

At last a cost effective simple to manage entry level class for everyone to enjoy.

For years we have struggled with establishing a simple entry level class which could not fiddled with too much and make life enjoyable for racers and well as organisers. Over the last three or four years the our North American colleagues have pioneered and successfully launched a class which as turned out to be extremely popular. So much so that two years ago UIM the global governing body for racing on water actually sanctioned the class and it is now a recognised class in International events.

The class is based on the 350 chev presented to the racing public as a zz4 details are such.

ZZ4 Crate Engine 350CI 355HP HO with Aluminum Heads 24502609

ZZ4 Crate Engine 350CI 355HP HO with Aluminum Heads 24502609 Description

Imagine an aluminum head small block that makes 355 horsepower.
What if it had a steel roller camshaft, four bolt main block, undercut rolled fillet crankshaft, high silicon pistons and strong PM connecting rods? We imagined it, and then engineered, developed, tested and built it. The ZZ4 is the evolution of our popular ZZ series of small blocks that power thousands of street rods, hot street cars, circle track racers and drag racers. With over 400 ft.lbs. of torque, the ZZ4 is the best way to put an aluminum head, roller cam, high performance small block between your favorite fenders.

The aluminum angle plug cylinder heads have screw in rocker studs, 1.94" intake and 1.50" exhaust valves and 58cc combustion chambers that yield a crisp and responsive 10 to 1 compression ratio. Also included are our lightweight valve spring retainers that weigh half as much as our previous design. The valve seats are radiused and we've included valve stem seals to help keep the oil where it belongs.

To compliment the cylinder head design, we've incorporated a steel roller tappet camshaft with .474" intake and .510" exhaust valve lift. The combination makes 355 horsepower at 5250 rpm and has that great sounding muscle car idle, with just enough lope to let people know that this is no station wagon engine.

Also included with the ZZ4 is an HEI distributor with an ignition timing advance curve developed for performance, a dual plane aluminum intake manifold that accepts your spread bore or square bore carburetor, an 8" high-RPM torsional damper, 12.75" auto trans flex plate and cast iron water pump.

The ZZ4 is currently our most popular crate engine, and you can see why. With a long history of successes in circle track and drag racing as well as street rods and other performance applications, the ZZ4 may just be the bullet for your next project.

The ZZ4 is not intended for marine use, and should only be used in 1976 and earlier pre-emissions street vehicles or any year off road vehicles

As always there will be those who are sceptical of the concept however we certainly seem to have more than enough interest to justify launching the class and supporting it here in NZ.

Look at the advantages though. Stock engines, which are easily to manage. You run on pump gas which is a major plus.

In addition there are as many as 30 boats already competing in North America and there is considerable interest from them in our upcoming World Championships next year.

RRA is seeking to understand the level of interest and to this end we invite you to write or email us to register your interest.

The class will only get off the ground if you the racers, new and old tell us you want it.

Rob Pooley
President
NZJBRRA