Does anyone know the specs for the GM zz3 crate motor? I want to know what heads, cam profile, HP/torque numbers, etc.
TIA

Also, whats the difference between the zz3 and zz4?

btw. I think I just bought it anyways.

Do you mean the ZZ4? here are the specs on that motor:
Imagine an aluminum head small block that makes 355 horsepower. What if it had a street roller camshaft, 4-bolt main block, 1053 forged steel 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 have 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 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 harmonic balancer, 12.75" automatic trans flex plate and a cast iron water pump. It even has the spark plugs in it when it was test fired at the factory for quality control checks. 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 1973 and earlier pre-emissions street vehicles or any year off road vehicle. Technical Notes: Carb, plug wires, starter, oil filter and oil filter adapter, and exhaust manifolds not included.

The ZZ3 is the predecessor of the ZZ4. I know the specs for the ZZ4 because they're in every mail order catalog and performance website. But the ZZ3 is out of production, and I can't find much on it. I did find the cam specs to be the same according to gmpartsdirect.com

thanks

How much is a ZZ4? and where's the best place to get gm crate motors (in canada) cause i'm sure the dealer would jack the price sky high

I don't know how shipping to Canada may work but in the US try paceparts.com http://www.paceparts.com/search.asp?7=zz4&1=Go

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LS1 v8 T-Top 87 GT

http://ls1swap.tripod.com/

I've got a paper copy of the 1996 GM Performance Parts catalog in front of me, but it's a lot to type out. If you need the info, let me know and I'll dig my scanner out of the closet (wish it was USB) and send you it in jpg or pdf or something.

Hopefully this will help, I found it on some Monte Carlo website.

#

High Output 350 (ZZ3)
# PN: 10185072
# Cost: about $3000 (includes many accessories, intake, distributer and water pump)
# Displacement: 350 cubic inches (5.7L)
# Horsepower: 345 at 5200 rpm
# Torque: 387 lb-ft at 3250 rpm
# Max RPM: 5800
# Compression ratio: 9.8:1
# Bore & Stroke: 4.00" x 3.48"
# Pistons: Cast hypereutectic aluminum
# Rods: 1053 forged steel "pink"
# Heads: Cast aluminum, angled plugs, 58cc
# Head specs: 1.94"/1.50"
# Camshaft: Hydraulic roller tappet
# Cam specs: 208/221 .474"/.510" 308/316 (advertised)
# Idle: 750 rpm

Regards,

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Kris Duck

Little, Yellow, Different

Thanks Kris Duck
Doesnt look like much difference from the zz4. The zz4 has a little higher compression. I dont know if thats the only difference. It has a little more HP 355-vs-345 and higher torque 410-vs-387

Either one is still a pocket rocket in a fiero. Hehe I just hope the person emails me back to tell me when I can get it.

The ZZ3 also has a low-profile dual plane aluminum intake manifold.

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Tom Corey
Melbourne, FL
87 Green T-Top GT 5Spd SBC ZZ3 V8
88 Yellow T-Top GT, 4.9L Caddy, 4T60E

thanks for the replies.

Looks like I'm picking the motor up next weekend. Its a zz3 with the Accel Street Ram TPI with the DFI harness and computer. MMMM yummy

There was a guy online that had a ZZ3 in his astro van. The videos were amazing, that thing was fast and did burnouts like no other. I wish my dads old astro van had balls like that one, lol, instead of the engine it just got racing stripes. It's for sale now, some lady is coming to look at it. I can't wait to see her when she sees the racing stripes on it. I could just imagine what that engine would be like in a fiero.