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Old 10-23-2012, 04:38 PM   #1
ZL1LEGEND
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ZR1 Engine and the ZL1 Engine

So what's the difference? Is the same LSA used in CTsV ZL1 AND ZR1?
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Old 10-23-2012, 04:47 PM   #2
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Zr1 has a 2.3L blower. Zl1 and ctsv have 1.9L

Zr1 has a different cam, among a few other internal differences.
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Old 10-23-2012, 04:48 PM   #3
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Originally Posted by ZL1LEGEND View Post
So what's the difference? Is the same LSA used in CTsV ZL1 AND ZR1?
ZR1 has a LS9 which has a 2.3 Eaton blower.
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Old 10-23-2012, 05:00 PM   #4
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2.3L Blower vs. 1.9L Blower and Block and heads are beefier.
And the ZR1 Engine is about $10K More.

ZR1
  • Engine Type: LS Series Gen IV Small-Block V-8
  • Displacement (cu in): 376 cu in (6.2L)
  • Bore x Stroke (in): 4.06 x 3.62 (103.25 x 92mm)
  • Block: Cast-aluminum with 6 bolt,
  • cross-bolted main caps
  • Crankshaft (P/N 12598610): Forged Steel
  • Connecting Rods (P/N 12624231): Forged titanium
  • Pistons (P/N 12598634): Forged aluminum
  • Camshaft Type (P/N 12605527): Hydraulic roller
  • Valve Lift (in): .562” intake / .558” exhaust
  • Camshaft Duration (@.050 in): 211° intake / 230° exhaust
  • Cylinder Heads (P/N 12621774): Aluminum L92 style ports;
  • as cast with 68cc chambers
  • Valve Size (in): 2.16 intake / 1.59 exhaust
  • Compression Ratio: 9.1:1
  • Rocker Arms (P/N 12569167 int): Investment-cast, roller trunnion
  • Rocker Arms (P/N 10214664 exh): Investment-cast, roller trunnion
  • Rocker Arm Ratio: 1.7:1
  • Recommended Fuel: 92 octane
  • Maximum Recommended rpm: 6600
  • Reluctor Wheel: 58X
  • Balanced: Internal
LSA Motor
  • Engine Type: LS Series Gen IV Small-Block V-8
  • Displacement (cu in): 376 cu in (6.2L)
  • Bore x Stroke (in): 4.06 x 3.62 (103.25 x 92mm)
  • Block (P/N 12627939): Cast-aluminum with 6 bolt,
  • cross-bolted main caps
  • Crankshaft (P/N 12603616): Forged Steel
  • Connecting Rods (P/N 12604857): Powdered metal
  • Pistons (P/N 12625119: Hypereutectic aluminum
  • Camshaft Type (P/N 12605220): Hydraulic roller
  • Valve Lift (in): .480” intake / .480” exhaust
  • Camshaft Duration (@.050 in): 198° intake / 216° exhaust
  • Cylinder Heads (P/N 12604860): Aluminum L92 style port;
  • as cast with 68cc chambers
  • Valve Size (in): 2.16 intake / 1.59 exhaust
  • Compression Ratio: 9.1:1
  • Rocker Arms (P/N 12569167 int): Investment-cast, roller trunnion
  • Rocker Arms (P/N 10214664 exh): Investment-cast, roller trunnion
  • Rocker Arm Ratio: 1.7:1
  • Recommended Fuel: 92 octane
  • Maximum Recommended rpm: 6600
  • Reluctor Wheel: 58X
  • Balanced: Internal
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Old 10-23-2012, 05:31 PM   #5
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Hmm... Max' RPMs don't look right for LSA... I think it's something like 6200...
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Old 10-23-2012, 05:33 PM   #6
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I believe LS9 also has Ti intake and hollow-sodium-filled exhaust valves.
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Old 10-23-2012, 07:48 PM   #7
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Great post, Speedmon....and I agree with your points, as well Radz.

The differences are in strength of materials and hp/tq...not the design. So it's easy to confuse the two when just casually talking about it.
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Old 10-23-2012, 09:04 PM   #8
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Just playing a numbers game if GM would have put the LS9 in the ZL1 we would be looking at a 70k Camaro.
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Old 10-23-2012, 11:41 PM   #9
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Good stuff. Thanks for clarification. This settled a long time father son debate. Hahah

Last edited by ZL1LEGEND; 10-24-2012 at 07:12 PM.
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Old 10-26-2012, 12:28 PM   #10
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Just playing a numbers game if GM would have put the LS9 in the ZL1 we would be looking at a 70k Camaro.
And the shelby wouldnt be beating up stock zl-1's
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Old 10-26-2012, 12:35 PM   #11
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And the shelby wouldnt be beating up stock zl-1's
Itl be a lot closer when gm releases the stage 2 upgrade. From what I heard from the service manager at my dealer he said he was just in a meeting where they were talking about and it should be out by spring and be under 800 bucks.
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Old 10-26-2012, 12:37 PM   #12
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What are the differences between the ZL1 and the LS3 aside from the obvious Supercharger? LoL

Sent from my friggin Droid by two thumbs using Tapatalk 2 or whatever the ish it's called....
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Old 10-26-2012, 01:47 PM   #13
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Itl be a lot closer when gm releases the stage 2 upgrade. From what I heard from the service manager at my dealer he said he was just in a meeting where they were talking about and it should be out by spring and be under 800 bucks.
Really? Or are you...
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Old 10-26-2012, 01:53 PM   #14
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Really? Or are you...
I'm being serious just talked to him yesterday morning.
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