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Old May 9, 2008 | 12:20 PM
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i am pretty sure our cars have a 325 cu in. engine but i thought i saw something online the other day that said our engines are 346 cu in....anyone able to back me up on this?
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Old May 9, 2008 | 12:58 PM
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The LS-1's are 346ci the LS2's are 364 so I think they were talking about a different motor. You are right in the LS-4's
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Old May 9, 2008 | 01:11 PM
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Yea they're 325.
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Old May 10, 2008 | 09:30 AM
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325ci
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Old May 10, 2008 | 03:47 PM
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Yup, 325CI Disp.
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Old May 10, 2008 | 08:41 PM
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most will call it a 327ci the same as Ls1s are commonly refered to as 350ci
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Old May 11, 2008 | 06:48 AM
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I'm guilty of that.....
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Old May 11, 2008 | 01:16 PM
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Originally Posted by wannabess00
most will call it a 327ci the same as Ls1s are commonly refered to as 350ci
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Old May 11, 2008 | 06:54 PM
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its cool! I will always refer to the 5.3 as a 327ci lol! sounds cooler
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Old May 11, 2008 | 07:06 PM
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Yea anyone who's ever asked what I have in the SS has responded with "oh a 327" when I've told them it has a 5.3L in it.
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Old May 11, 2008 | 07:42 PM
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I believe we would have a true 327 if the our engines were not 1" shorter then the 5.3 vortec
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Old May 11, 2008 | 07:57 PM
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??????????????

That doesn't even begin to make sense.

You want 327? Bore it .010 over.

But then I guess you'd technically have a 5.4
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Old May 12, 2008 | 07:36 PM
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Originally Posted by 20SS07
Yea they're 325.
Here's almost everything you always wanted to know about the LS4:

2008 "LS4" 5.3L V8 ( LS4 ) 101906
Type: 5.3L Gen IV V8 Small Block
Displacement: 5328cc (325 ci)
Engine Orientation: L=Longitudinal T=Transverse Transverse
Compression ratio: 10:1
Valve configuration: overhead valves
Valves per cylinder 2
Assembly site: St. Catharines, Ontario, Canada
Valve lifters: hydraulic roller
Firing order: 1 - 8 - 7 - 2 - 6 - 5 - 4 - 3
Bore x stroke: 96.0 x 92.0 mm
Bore Center (mm) 111.76
Bore Area ( cm2 ) ( total engine bore area ) 579.06
Fuel system: sequential fuel injection
Fuel Type: Premium Fuel recommended
Ignition System: Coil-near-plug
Application: Horsepower: hp ( kw )
Chevrolet Impala SS 303 hp (226 kw) @ 5600 rpm SAE CERTIFIED
Pontiac Grand Prix GXP
Buick Lacrosse " Super " 300 hp ( 224kW ) @ 5600 rpm SAE CERTIFIED
Application: Torque: lb-ft. ( Nm )
Chevrolet Impala SS 323 lb-ft (438 Nm ) @ 4000 rpm SAE CERTIFIED
Pontiac Grand Prix GXP
Buick Lacrosse " Super "
Fuel shut off: 6100 rpm
Engine Mass ( kg/lbs ) engine plant as shipped 190 / 419
Emissions controls: catalytic converter
three-way catalyst
positive crankcase ventilation
MATERIALS
Block: cast aluminum
Cylinder head: cast aluminum
Intake manifold: composite
Exhaust manifold: cast nodular iron
Main bearing caps: powder metal
Crankshaft: cast nodular iron with undercut and rolled fillets
Camshaft: hollow steel
Connecting rods: powder metal
Additional features: extended life spark plugs
extended life coolant
oil level sensor
Oil Life System
Active Fuel Management
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Old May 12, 2008 | 11:07 PM
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^Wow.
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