"built" engine?

[slow99]

guy on another board is saying the ls7 is a "built" 427. i can't find anything searching to tell me if it is or not. i know it doesn't have forged pistons. is it not alum. block? i can find a couple of threads stating it's "hardened"?
thanks!

[Antivenom 447]

Originally Posted by slow99

guy on another board is saying the ls7 is a "built" 427. i can't find anything searching to tell me if it is or not. i know it doesn't have forged pistons. is it not alum. block? i can find a couple of threads stating it's "hardened"?
thanks!

LS7 specifications:
Part number: 17802397
Horsepower: 500 (373 kW) @ 6200 rpm
Torque (lb.-ft.): 475 (644 Nm) @ 4800 rpm
Engine type: Cam-in-block 90-degree V-8
Displacement (L/cu in): 7.0 / 427
Bore x stroke (mm/in) 104.8 x 101.6 / 4.125 x 4.00
Block: Cast aluminum with pressed-in cylinder sleeves and 6-bolt, forged steel main bearing caps
Crankshaft: Forged steel
Connecting rods: Forged titanium
Pistons: Cast aluminum
Camshaft type: Hydraulic roller, 15 mm (.591 in) lift (intake and exhaust)
Cylinder heads: CNC-ported aluminum; 70-cc chamber volume
Valve size (mm/in): 56 / 2.20 (titanium) intake / 41 / 1.61 (sodium-filled) exhaust
Compression ratio 11.0:1
Rocker arms: 1.8:1; offset (intake only)
Recommended fuel: Premium required. 91 octane minimum

LS7 crate engine (P/N 17802397) includes:
Intake manifold with injectors
Injector wiring harness
Fuel rails
Throttle body
Dry sump oil pan
Exhaust manifolds
Flywheel & clutch
Harmonic dampener
Water pump and pulley
Coil Packs, spark plugs and wires
Engine sensors

LS7 crate engine does not include:
Dry sump oil lines
Dry sump tank
Engine beauty cover
Engine processor
Air filter/air box
Accessories or accessory drive

[benenati379]

What do you mean by 'built'? It is hand built if that is what you mean. The parts are listed above.

[MikesZ06]

Originally Posted by benenati379

What do you mean by 'built'? It is hand built if that is what you mean. The parts are listed above.

Usually when someone refers to 'built', they are referring to forged internals aren't they?
I guess if that is the question, this engine is pretty much 'built' (except for the pistons).

Mike

[benenati379]

So many people throw around the word 'built' it could mean so many things.

Hell, I've met ricers at cars shows that consider headers and intake 'built'.

[slow99]

Originally Posted by MikesZ06

Usually when someone refers to 'built', they are referring to forged internals aren't they?
I guess if that is the question, this engine is pretty much 'built' (except for the pistons).

Mike

i've always took "built" to mean iron or hardened block and forged internals. think that's what this guy is referring to, thanks everyone

[Gagunga]

So why did Chevy chintz out on the pistons?

[benenati379]

They didn't "chintz" out on the pistons. They are lighter than forged, plenty strong enough (without boost), and are more emissions friendly.

[MikesZ06]

Originally Posted by benenati379

They didn't "chintz" out on the pistons. They are lighter than forged, plenty strong enough (without boost), and are more emissions friendly.

Mike