08-12-2019, 01:00 PM | #1 |
Dumb Ass Deluxe
Drives: A Tricked Out Mountain Bike Join Date: Jun 2019
Location: Arizona
Posts: 1,959
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L87 Block
Any difference(s) between the L87 truck short block and the LT1 short block?
(I'd think the cam is different at minimum) What about the heads? |
08-12-2019, 02:50 PM | #2 |
Drives: 2021 300 Join Date: Jan 2015
Location: New Jersey
Posts: 968
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There are no spec's for the heads yet. But its an iron block motor not aluminium with lower compression designed for towing applications. Its rated and 401hp and 464tq.
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08-12-2019, 03:22 PM | #3 |
Rayvan
Drives: 2018 1SS1LE, Silver Ice Metallic Join Date: Dec 2018
Location: San Jose, CA
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I think you mean L86. Same block as LT engines, but with lower compression and 420HP
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08-12-2019, 06:58 PM | #4 |
Dumb Ass Deluxe
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08-12-2019, 08:28 PM | #5 |
Drives: 2018 1ss, 2021 silverado HD Join Date: Jul 2017
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I believe the lt1 and l86 share everything except intake manifold, exhaust manifold and tune. All internals are the same.
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08-15-2019, 01:53 AM | #6 | |
Drives: 2016 Camaro 2SS A8 Join Date: Oct 2016
Location: New Orleans, LA
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Quote:
Parts sharing FTW! L86 specs https://help.summitracing.com/app/an...6-engine-specs LT1 specs https://help.summitracing.com/app/an...1-engine-specs |
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08-15-2019, 08:59 AM | #7 | |
Dumb Ass Deluxe
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Quote:
The plot thickens.... |
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08-15-2019, 05:08 PM | #8 | |||
Drives: 2019 Shock ZL1 Join Date: Jan 2007
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Quote:
Quote:
Quote:
The 6.2 L87 uses DFM (Dynamic Fuel Management) so all 8 cylinders can be "active" in terms of shutting down. 17 different patterns are possible with this, running on as low as 1 cylinder. DFM doesn't use a VLOM in the valley of the engine anymore like LT1 still uses. L87 has a flat traditional valley cover. There are now 8 individual oil control solenoids, one per cylinder to control DFM operation. Cylinder heads are the same part # LT1 to L87. L87 now uses an LS style water pump/water pump housing. LT1 has the L86 style water pump housing still. L87 and LT1 use different cams. Both are 11.5:1 compression ratio, 93 octane recommended/required, can run on 91 with reduced performance.
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