LT1 engines across various models - how do they differ?
01-20-2016, 10:18 AM
#1
Le Mans Master
Thread Starter
LT1 engines across various models - how do they differ?
I am curious about simple, but possibly interesting question. The LT1 is now used in multiple models, the Corvette and Camaro. Are the actual engines identical in design and specs as they're built before getting prepared for installation (i.e. before manifolds, etc. are bolted on)? If they do differ, what differentiates the Corvette-specific LT1 from the others? While we are on the topic of the LT1, what was the reasoning behind the decision to bring back (or recycle, depending on how you want to look at it) the LT1 and LT4 engine designations. Thank you for your time and consideration!
Last edited by Kracka; 01-25-2016 at 04:53 PM.
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01-20-2016, 10:45 AM
#2
That actually is a fantastic question and would love to see if there are any differences! Being interested in grabbing a Silverado at the end of this year (v8 but just maybe the LT1), having the '16 camaro 2SS I really would love to know the answer to feed my curiosity!
01-21-2016, 04:09 PM
#3
The LT1 is actually only used in the Corvette and Camaro.
The 6.2L truck engine is actually an L86.
I think the question is still interesting though, as GM's powertrain site lists some differences but I'm sure there are more. Plus it gives insight into the things they change for specific vehicle applications.
They have the same compression ratio.
LT1 revs to 6600 vs. 6000 for L86.
Materials listed (alloys unspecified) for the block, heads, intake manifold, exhaust manifold, main bearing caps, crank, camshaft, and con-rods are the same.
Things like cam specs are not listed, so it would be neat to see if they're the same and the different power profile comes only from intake/exhaust manifolds and tuning, or if the camshafts are different as well (which I suspect is the case).
The 6.2L truck engine is actually an L86.
I think the question is still interesting though, as GM's powertrain site lists some differences but I'm sure there are more. Plus it gives insight into the things they change for specific vehicle applications.
They have the same compression ratio.
LT1 revs to 6600 vs. 6000 for L86.
Materials listed (alloys unspecified) for the block, heads, intake manifold, exhaust manifold, main bearing caps, crank, camshaft, and con-rods are the same.
Things like cam specs are not listed, so it would be neat to see if they're the same and the different power profile comes only from intake/exhaust manifolds and tuning, or if the camshafts are different as well (which I suspect is the case).
Last edited by CPhelps; 01-21-2016 at 04:10 PM.
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Dogfather6 (01-22-2016)
01-21-2016, 04:58 PM
#4
Le Mans Master
Thread Starter
01-22-2016, 11:04 AM
#5
The LT1 is actually only used in the Corvette and Camaro.
The 6.2L truck engine is actually an L86.
I think the question is still interesting though, as GM's powertrain site lists some differences but I'm sure there are more. Plus it gives insight into the things they change for specific vehicle applications.
They have the same compression ratio.
LT1 revs to 6600 vs. 6000 for L86.
Materials listed (alloys unspecified) for the block, heads, intake manifold, exhaust manifold, main bearing caps, crank, camshaft, and con-rods are the same.
Things like cam specs are not listed, so it would be neat to see if they're the same and the different power profile comes only from intake/exhaust manifolds and tuning, or if the camshafts are different as well (which I suspect is the case).
The 6.2L truck engine is actually an L86.
I think the question is still interesting though, as GM's powertrain site lists some differences but I'm sure there are more. Plus it gives insight into the things they change for specific vehicle applications.
They have the same compression ratio.
LT1 revs to 6600 vs. 6000 for L86.
Materials listed (alloys unspecified) for the block, heads, intake manifold, exhaust manifold, main bearing caps, crank, camshaft, and con-rods are the same.
Things like cam specs are not listed, so it would be neat to see if they're the same and the different power profile comes only from intake/exhaust manifolds and tuning, or if the camshafts are different as well (which I suspect is the case).
01-25-2016, 04:54 PM
#6
Le Mans Master
Thread Starter
My original question has been edited to include Fyreant's question: https://www.corvetteforum.com/forums...on-reused.html
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FYREANT (01-25-2016)
01-25-2016, 06:00 PM
#8
Correct, LG indeed find a built in catch can on the SS. Apparently, it isn't enough for people and are ordering/installing an extra one lol.
01-25-2016, 06:26 PM
#9
I'm Batman..
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My original question has been edited to include Fyreant's question: https://www.corvetteforum.com/forums...on-reused.html
12-21-2016, 01:21 PM
#10
Instructor
I am curious about simple, but possibly interesting question. The LT1 is now used in multiple models, the Corvette and Camaro. Are the actual engines identical in design and specs as they're built before getting prepared for installation (i.e. before manifolds, etc. are bolted on)? If they do differ, what differentiates the Corvette-specific LT1 from the others? While we are on the topic of the LT1, what was the reasoning behind the decision to bring back (or recycle, depending on how you want to look at it) the LT1 and LT4 engine designations. Thank you for your time and consideration!
01-15-2017, 11:31 AM
#11
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I have a 1970 LT1 block in my 77 C3. My understanding was the LT1 was a four bolt main block and the engine i have came out of a Caprice. So were other GM models installed with factory LT1?
