lt1 vs ls1
#11
also the ls1 has an advantage of being lighter. the lt1s have a cast iron block while the ls1s have an aluminum block, so right there is a difference. i dont know the exact weight difference, but it all matters. and yes, the lt1s came with 275 hp, and i do believe in 96 and 97 they were bumped to 285 hp. and correct me if im wrong, but i believe the ls1 was about 305 hp from factory.
#12
well i knew the blocks was diffrent from iron to aluminum but i didnt know the ls1 was a 346 i thought they were the same block basicly besides the iron and aluminum....And the ls1 heads want work on a lt1?guess ya learn somthing new everyday.
#14
LT1 vs. LS1
I will stick with my LT1 for awhile I'm lookin at getting a LSX 454 or a 6.2l out of the new Camaro's
Block and Basics
Displacement: 350 cubic inches, 5733 cubic centimeters, 5.7 liters
Block Material: Cast Iron
Main Bearings: 2-Bolt Centers and Ends (The Corvette LT1/LT4 had 4-bolt mains)
Stroke: 3.48"
Bore: 4.00"
Compression Ratio: 10.4:1
Combustion Chambers: 54 cubic centimeters
Factory Redline Rating: 5700 Rotations Per Minute
Bottom End
Piston Material: (10159437) Eutectic Aluminum/Silicon Alloy
Connecting Rod Material: (10108688) Powdered Metal
Crankshaft Material: (12556307) Cast Iron
Top End and Valvetrain
Cylinder Heads: (10168448) Cast Aluminum, 2 valves per cylinder/16 valves total, ~212 CFM flow (Impala SS and Caprice heads were made of cast iron*)
Valve Diameter: (intake- 10241743, exhaust- 12550909) 1.94 intake, 1.50 exhaust
Valve Overlap: 41*
Valvesprings: (10206040) 85 lbs, seated
Camshaft Specs (12551705): 205/207 duration @ 50*, .447/.459" lift, 117 Lobe Seperation Angle
Rocker Arms: (10089648) 1.5:1 Stamped Steel
Timing Chain: (10128485) Powdered metal butt link
Intake and Fuel Delivery
Fuel Delivery: Electronic Fuel Injection, sequential port
Injector Size: (17124248) 3.0gps, 22lbs/hr speed density (1992-1993), 24lbs/hr mass airflow (1994-1997)
Throttle Body: 48 millimeter twin butterfly
Intake Manifold: (12552137) Aluminum
Factory Power Ratings
92-96 LT1 Corvette: 300bhp, 330lb-ft
1996 LT4 Corvette: 330bhp, 340lb-ft
1992 LT5 Corvette: 375bhp, 370lb-ft
93-95 LT5 Corvette: 405bhp, 385lb-ft
93-95 LT1 F-Body: 275bhp, 325lb-ft
96-97 LT1 F-Body: 285bhp, 325lb-ft
96-97 WS6/SS: 305bhp, 335lb-ft
93-97 Firehawks: 315bhp, 340lb-ft
LS1
General Specifications
Displacement 5.7L (5665cc, 346ci) Gross Horsepower 310 @ 5200 RPM, 320 @ 5800 RPM
Bore/Stroke 3.90/3.62 Gross Torque 340 @ 4000 RPM, 330 @ 4400 RPM
Compression Ratio10.1:1 Maximum RPM 6200
Firing Order 1-8-7-2-6-5-4-3
Out of crate weight. Approximately 390 lbs.
Spark Plug ACDelco 12 ACDelco 41-985 Spark Plug Gap .060”, 1.524 mm
Compression ratio:
10.25:1
Block and Basics
Displacement: 350 cubic inches, 5733 cubic centimeters, 5.7 liters
Block Material: Cast Iron
Main Bearings: 2-Bolt Centers and Ends (The Corvette LT1/LT4 had 4-bolt mains)
Stroke: 3.48"
Bore: 4.00"
Compression Ratio: 10.4:1
Combustion Chambers: 54 cubic centimeters
Factory Redline Rating: 5700 Rotations Per Minute
Bottom End
Piston Material: (10159437) Eutectic Aluminum/Silicon Alloy
Connecting Rod Material: (10108688) Powdered Metal
Crankshaft Material: (12556307) Cast Iron
Top End and Valvetrain
Cylinder Heads: (10168448) Cast Aluminum, 2 valves per cylinder/16 valves total, ~212 CFM flow (Impala SS and Caprice heads were made of cast iron*)
Valve Diameter: (intake- 10241743, exhaust- 12550909) 1.94 intake, 1.50 exhaust
Valve Overlap: 41*
Valvesprings: (10206040) 85 lbs, seated
Camshaft Specs (12551705): 205/207 duration @ 50*, .447/.459" lift, 117 Lobe Seperation Angle
Rocker Arms: (10089648) 1.5:1 Stamped Steel
Timing Chain: (10128485) Powdered metal butt link
Intake and Fuel Delivery
Fuel Delivery: Electronic Fuel Injection, sequential port
Injector Size: (17124248) 3.0gps, 22lbs/hr speed density (1992-1993), 24lbs/hr mass airflow (1994-1997)
Throttle Body: 48 millimeter twin butterfly
Intake Manifold: (12552137) Aluminum
Factory Power Ratings
92-96 LT1 Corvette: 300bhp, 330lb-ft
1996 LT4 Corvette: 330bhp, 340lb-ft
1992 LT5 Corvette: 375bhp, 370lb-ft
93-95 LT5 Corvette: 405bhp, 385lb-ft
93-95 LT1 F-Body: 275bhp, 325lb-ft
96-97 LT1 F-Body: 285bhp, 325lb-ft
96-97 WS6/SS: 305bhp, 335lb-ft
93-97 Firehawks: 315bhp, 340lb-ft
LS1
General Specifications
Displacement 5.7L (5665cc, 346ci) Gross Horsepower 310 @ 5200 RPM, 320 @ 5800 RPM
Bore/Stroke 3.90/3.62 Gross Torque 340 @ 4000 RPM, 330 @ 4400 RPM
Compression Ratio10.1:1 Maximum RPM 6200
Firing Order 1-8-7-2-6-5-4-3
Out of crate weight. Approximately 390 lbs.
Spark Plug ACDelco 12 ACDelco 41-985 Spark Plug Gap .060”, 1.524 mm
Compression ratio:
10.25:1
Last edited by SS/Z28cam; 02-18-2010 at 04:55 PM.
#16
Also to mention the trust bearings wear changed from the rear in the lt1'S to the middle of the LS series
#17
Advantages of LS1:
Efficiency
Better breathing
Less weight (nearly 50% less from what I've heard)
Better response to mods
Better top end power
(Again, from what I heard) better for high end projects.
Disadvantages:
Euro-V8 sound (lot of muscle car guys hate it, I personally don't mind it)
Higher cost of parts and modifications
The "fish-eye" front end (although some love it, I personally hate it)
LT1's advantages:
Cheap to buy
Cheap to mod
Bulletproof engine block
More torque available at lower revs (faster off the line)
Old school muscle car noise
Retains more of the original concept design for the 4th generation Camaro, therefore a better designed car (let me make that clear, that's a fact)
Disadvantages:
Opti-spark
Inefficient (I'm getting 14mpg with conservative driving)
Also, I'd like to correct one of the posts made above; a lot of under the hood LS1 parts are interchangeable with LT1s, although none of them are directly a part of the actual engine.
Efficiency
Better breathing
Less weight (nearly 50% less from what I've heard)
Better response to mods
Better top end power
(Again, from what I heard) better for high end projects.
Disadvantages:
Euro-V8 sound (lot of muscle car guys hate it, I personally don't mind it)
Higher cost of parts and modifications
The "fish-eye" front end (although some love it, I personally hate it)
LT1's advantages:
Cheap to buy
Cheap to mod
Bulletproof engine block
More torque available at lower revs (faster off the line)
Old school muscle car noise
Retains more of the original concept design for the 4th generation Camaro, therefore a better designed car (let me make that clear, that's a fact)
Disadvantages:
Opti-spark
Inefficient (I'm getting 14mpg with conservative driving)
Also, I'd like to correct one of the posts made above; a lot of under the hood LS1 parts are interchangeable with LT1s, although none of them are directly a part of the actual engine.
Last edited by AmirGTR; 02-20-2010 at 07:41 AM.
#20
amir u have something wrong. u should be getting 25+ mpg. my last 93 i got in the area of 27mpg no matter how i drove it. this one i cant get it over 25 and still trying to figure out y.