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Discussion Starter #1
I haven't been able to copy the picture of it, but I'll keep looking. Might have to print the page, scan it in, and launder it that way. The valve covers it comes with has bosses for coil-per-cylinder :))THumbsUp

The only main thing I see keeping it from being "better" is the hyper pistons. They did a forged crank and rods, but failed to follow through on the pistons. Weird.

Vortec 8.0L

Part Number: 19256938
Engine Type: Chevy Big-Block V-8
Displacement (Litre): 8.0L
Displacement (cu in): 488
Bore x Stroke (in): 4.270x4.250
Block (P/N 19256820): Tall Deck (10.2")
Fuel Requirements: LPG/CNG
Crankshaft (P/N 19300876): Forged steel
Connecting Rods (P/N 19256831): Forged steel
Firing Order: 1-8-7-2-6-5-4-3
Connecting Rod Ratio: 1.58:1
Pistons (19256829): Hypereutictic w/anodized top ring land
Camshaft Type (P/N 12556291): Hydraulic Roller
Cylinder Heads (P/N 19256827): Fast Burn Iron
Damper (P/N 19256830) Cast Iron
Valve Train: Fully Adjustable
Compression Ratio: 9.9:1 nominal
Crankcase capacity: 8 Qts
Maximum Recommended rpm: 4,500
Balanced: Internal

315 HP @ 4500 rpm (CNG)
375 HP @ 4200 rpm (gasoline)
390 LB-FT @ 3500 rpm (CNG)
475 LB-FT @ 3200 rpm (gasoline

A Big-Block for your truck – and it’s
compatible with gasoline, CNG, or LPG!
When it comes to grunt work – like pulling your car hauler or offshore
racing boat – Chevrolet Performance’s new, heavy-duty 8.0L Big-Block
does the job like no other engine.
This latest edition of the classic Big-Block is all about torque and makes
up to 475 lb.-ft. (on gasoline) by only 3,200 rpm – and maintains a
smooth, flat and useful torque band across the entire rpm range. That
gives your truck the power to pull just about anything and flatten the
steepest grades.
The 8.0L is built with a tall-deck (10.2-inch deck height) version of our
latest Big-Block casting, which features full-length water jackets, thicker
main bearing webs and four-bolt main caps. It also uses a forged steel
crankshaft and forged connecting rods for optimum strength. A long,
4.250-inch stroke helps maximize the torque.
This modern Big-Block is equipped for a crank-triggered ignition system
and features a 4X camshaft and 58X crankshaft reluctor wheels to
support it. The engine can support fuel injection and also has a provision
for a mechanical fuel pump.* Our assembly comes with heads and a
balancer installed. An induction system, ignition, starter, water pump
and other accessories are required to finish the engine.

NOTE: This engine requires an intake manifold designed for a tall-deck block.
Chevrolet Performance intake manifold P/N 88961161 was used in development.
Conventional big-block intake manifolds can be used with spacers (not included).

*Production 8.0L camshaft does not have a fuel pump lobe.
*Chevrolet Performance Crate Engines include a 24-month
or 50,000-mile/80,000-kilometer limited warranty.

Sale Price: $6,766.18

List Price: $6,932.56

New here
4,219 Posts
Discussion Starter #3
Thats a nice motor for the money but 4500 rpm ? that sucks
I agree. Hell, even the 8.1L is (only) 5100!

Not sure what the whole 4500 thing is about.

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