Re-Sleeving LS4's for larger displacement
11-06-2007, 05:38 PM
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Re-Sleeving LS4's for larger displacement I'm in the research stage of upgrading my '02 Regal with an LS4. What do you think of re-sleeving the block for larger pistons to get more power.
11-07-2007, 10:02 AM
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Even cranks shouldn't be a problem given enough demand/dollars! I think a good topend Intake/heads/cam should produce some real good power (400-500HP) outta a 325 CID LSX! Does anyone have bore/stroke specs on a LS4? I tell ya a decent intake with a LS6 cam alone should do damage!
11-07-2007, 05:32 PM
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I plan the standard LS2 4" bore with pistons to match. SLP has an L92 head/intake package for LS2's, and with a Livernois Motorsports Stage II cam, GM High Tech Performance did a dyno with this combo and got 546hp. Of course the trans will need to be built much stronger. I'm not sure which way to go in the cam b/c of the Active Fuel Management/DOD.
11-07-2007, 06:15 PM
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Even cranks shouldn't be a problem given enough demand/dollars! I think a good topend Intake/heads/cam should produce some real good power (400-500HP) outta a 325 CID LSX! Does anyone have bore/stroke specs on a LS4? I tell ya a decent intake with a LS6 cam alone should do damage!
11-07-2007, 06:30 PM
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Even cranks shouldn't be a problem given enough demand/dollars! I think a good topend Intake/heads/cam should produce some real good power (400-500HP) outta a 325 CID LSX! Does anyone have bore/stroke specs on a LS4? I tell ya a decent intake with a LS6 cam alone should do damage!
http://www.gmtuners.com/LS4/index.htm
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11-19-2007, 10:04 PM
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I believe Notime is correct... we're 325 ci....
in addition to lsxregal's link, here's specs from GM as well:
Displacement (cu. in./liters) 325/5,328
Bore x stroke (in.) 3.78 x 3.62
Bore x stroke (mm) 96.0 x 92.0
Compression ratio 10.0:1
Block material cast-aluminum
Cylinder head material cast-aluminum
Valvetrain configuration OHV
Valves per cylinder 2
Ignition system coil-near-plug
Lifters hydraulic roller
Cam drive chain
Redline (RPM) 6000
Horsepower @ engine RPM 303 @ 5600
Torque (lb.-ft.) @ RPM 323 @ 4400
go here and enter 5.328 liters and hit the convert button...
http://www.csgnetwork.com/cubicinchlitercvt.html
http://www.4lo.com/calc/literstocid.htm
in addition to lsxregal's link, here's specs from GM as well:
Displacement (cu. in./liters) 325/5,328
Bore x stroke (in.) 3.78 x 3.62
Bore x stroke (mm) 96.0 x 92.0
Compression ratio 10.0:1
Block material cast-aluminum
Cylinder head material cast-aluminum
Valvetrain configuration OHV
Valves per cylinder 2
Ignition system coil-near-plug
Lifters hydraulic roller
Cam drive chain
Redline (RPM) 6000
Horsepower @ engine RPM 303 @ 5600
Torque (lb.-ft.) @ RPM 323 @ 4400
go here and enter 5.328 liters and hit the convert button...
http://www.csgnetwork.com/cubicinchlitercvt.html
http://www.4lo.com/calc/literstocid.htm
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
11-20-2007, 12:42 AM
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I believe Notime is correct... we're 325 ci....
in addition to lsxregal's link, here's specs from GM as well:
Displacement (cu. in./liters) 325/5,328
Bore x stroke (in.) 3.78 x 3.62
Bore x stroke (mm) 96.0 x 92.0
Compression ratio 10.0:1
Block material cast-aluminum
Cylinder head material cast-aluminum
Valvetrain configuration OHV
Valves per cylinder 2
Ignition system coil-near-plug
Lifters hydraulic roller
Cam drive chain
Redline (RPM) 6000
Horsepower @ engine RPM 303 @ 5600
Torque (lb.-ft.) @ RPM 323 @ 4400
go here and enter 5.328 liters and hit the convert button...
http://www.csgnetwork.com/cubicinchlitercvt.html
http://www.4lo.com/calc/literstocid.htm
in addition to lsxregal's link, here's specs from GM as well:
Displacement (cu. in./liters) 325/5,328
Bore x stroke (in.) 3.78 x 3.62
Bore x stroke (mm) 96.0 x 92.0
Compression ratio 10.0:1
Block material cast-aluminum
Cylinder head material cast-aluminum
Valvetrain configuration OHV
Valves per cylinder 2
Ignition system coil-near-plug
Lifters hydraulic roller
Cam drive chain
Redline (RPM) 6000
Horsepower @ engine RPM 303 @ 5600
Torque (lb.-ft.) @ RPM 323 @ 4400
go here and enter 5.328 liters and hit the convert button...
http://www.csgnetwork.com/cubicinchlitercvt.html
http://www.4lo.com/calc/literstocid.htm
!
11-24-2007, 09:22 PM
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Yes the LS4's connecting rods are 6.098 inches long powdered metal rods. Not sure if they are the exact same p/n though. I imagine that GM would cut costs buy using the same parts that are common to differant engines though ie: rods, rockers, pushrods . . . .
