IMPALA SS 07

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?

2KFORMULA

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

20SS07

Yea they're 325.

Mels SS

iTrader: (1)

325ci

Taz34SS

iTrader: (2)

Yup, 325CI Disp.

wannabess00

iTrader: (1)

most will call it a 327ci the same as Ls1s are commonly refered to as 350ci

Count of Monte Carlo

I'm guilty of that.....

Nacho SS

iTrader: (4)

wannabess00

iTrader: (1)

its cool! I will always refer to the 5.3 as a 327ci lol! sounds cooler

20SS07

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.

Taz34SS

iTrader: (2)

I believe we would have a true 327 if the our engines were not 1" shorter then the 5.3 vortec

TiredGXP

iTrader: (2)

??????????????

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

jpstax

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

Nacho SS

iTrader: (4)

^Wow.