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COPO Camaro Engine Specs

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Old Oct 31, 2015 | 08:27 PM
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Default COPO Camaro Engine Specs
Anyone know the specs on the 427 engine? LSA,etc.
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Old Nov 1, 2015 | 04:31 PM
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Cam specs aren't given, but its a 13.5:1 CR
4.125 bore 4.100 stroke forged steel rods and crank thats pretty much all the info given

GM Part# 17802825

http://paceperformance.com/i-1030664...te-engine.html
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Old Nov 1, 2015 | 07:08 PM
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http://www.enginelabs.com/engine-tec...-stock-racing/

Not exactly what you are looking for, but may answer some questions
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Old Nov 1, 2015 | 08:45 PM
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Originally Posted by 62nalide
Cam specs aren't given, but its a 13.5:1 CR
4.125 bore 4.100 stroke forged steel rods and crank thats pretty much all the info given

GM Part# 17802825

http://paceperformance.com/i-1030664...te-engine.html
4.125 x 4.100 does not make a 427...there seems to be a disconnect with the specs there
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Old Nov 1, 2015 | 08:53 PM
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Here ya go:

Chevrolet Performance LS7 aluminum block
4.125" bore x 4.00" stroke
Static compression ratio - 13:1 nominal
Callies 5140 crankshaft
Callies 4340 H-beam rods
6.100" C-C length
.928" pin bore diameter
Clevite H-Series heat-treated tri-metal rod and main bearings
Mahle 2618 alloy forged domed pistons
Graphal coating
Hard-anodized top ring groove
Friction-coated skirts
Mahle .043" x .043" x 3mm piston rings
Ductile iron top with radius molybdenum face
Plain cast iron tapered 2nd
Chrome-plated oil rails with low-tension expander
Chevrolet Performance steel billet hydraulic roller camshaft
Duration — 233°/276° @ .050" lift
Theoretical valve lift — .630"/.630"
Lobe centers — 107°

Off of Pace Performance's Website.
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Old Nov 2, 2015 | 12:10 AM
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Originally Posted by redtan
4.125 x 4.100 does not make a 427...there seems to be a disconnect with the specs there
Originally Posted by 427zm
Here ya go:

Chevrolet Performance LS7 aluminum block
4.125" bore x 4.00" stroke
Static compression ratio - 13:1 nominal
Callies 5140 crankshaft
Callies 4340 H-beam rods
6.100" C-C length
.928" pin bore diameter
Clevite H-Series heat-treated tri-metal rod and main bearings
Mahle 2618 alloy forged domed pistons
Graphal coating
Hard-anodized top ring groove
Friction-coated skirts
Mahle .043" x .043" x 3mm piston rings
Ductile iron top with radius molybdenum face
Plain cast iron tapered 2nd
Chrome-plated oil rails with low-tension expander
Chevrolet Performance steel billet hydraulic roller camshaft
Duration — 233°/276° @ .050" lift
Theoretical valve lift — .630"/.630"
Lobe centers — 107°

Off of Pace Performance's Website.
Ah sorry guys, I got the specs off the Copo book. I'll snap a pic in the am
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Old Nov 3, 2015 | 02:06 PM
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Old Nov 3, 2015 | 02:07 PM
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That's straight out of the Copo build book
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Old Nov 3, 2015 | 02:15 PM
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Must be a typo somewhere, whether the final displacement or the bore/stroke.

The 427 7.0 LS7 from the Z06 and Z28 is 4.125 x 4.000
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Old Nov 3, 2015 | 04:46 PM
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It is a typo. Just looked in my 2015 GM performance parts catalog, it says 4.00" stroke. All other posted specs look accurate.
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Old Nov 4, 2015 | 04:27 PM
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Ahhh cool, thanks for clearing that up
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