Gen 5 Small Block LT1... The Lt1 is back?
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Guess the Lt1 is back? o.O
hope this isn't a repost...
GM lifted the veil of secrecy on its fifth-generation V-8 small-block today; the engine will see its first appearance in the 2014 Corvette. Many prognostications were wrong, so here's all the specifics, right off the GM press kit:
Gen 5 Small Block LT1 Specifications
Engine type: 90-degree V-8 with overhead valves; continuous VVT
Displacement: 6.2L (376 cubic inches)
Bore x Stroke (in / mm): 4.06 x 3.62 / 103.25 x 92
Cylinder block: cast aluminum with nodular main caps
Main bearing fasteners: six, including two cross-bolts per cap
Crankshaft: forged steel
Connecting rods: powder metal, 6.125 inches in length
Pistons: eutectic aluminum alloy
Compression ratio: 11.5:1
Cylinder heads: 319-T7 cast aluminum with 59.02cc combustion chambers
Valve angles (degrees): 12.5 intake, 12 exhaust
Intake valves: 2.13 inches (54mm) hollow
Exhaust valves: 1.59 inches (40.4mm) hollow sodium
Camshaft: Hydraulic-type with tri-lobe for fuel-pump drive
Camshaft lift: 0.551-inch (14mm) intake / 0.524-inch (13.3mm) exhaust
Camshaft duration: 200-degrees intake / 207-degrees exhaust (at 0.050-inch)
Lobe separation angle: 116.5 degrees
Fuel delivery: direct injection
Intake manifold: “runners in a box” design; composite construction
Throttle: 87mm electronically controlled throttle body
Ignition: 58X with individual coil-on-plug and iridium-tip spark plugs
Horsepower / kW: 450/335 (estimated)
Torque – lb.-ft. / Nm: 450/610 (estimated)
Max. engine speed: 6,600 rpm (fuel cutoff)
hope this isn't a repost...
GM lifted the veil of secrecy on its fifth-generation V-8 small-block today; the engine will see its first appearance in the 2014 Corvette. Many prognostications were wrong, so here's all the specifics, right off the GM press kit:
Gen 5 Small Block LT1 Specifications
Engine type: 90-degree V-8 with overhead valves; continuous VVT
Displacement: 6.2L (376 cubic inches)
Bore x Stroke (in / mm): 4.06 x 3.62 / 103.25 x 92
Cylinder block: cast aluminum with nodular main caps
Main bearing fasteners: six, including two cross-bolts per cap
Crankshaft: forged steel
Connecting rods: powder metal, 6.125 inches in length
Pistons: eutectic aluminum alloy
Compression ratio: 11.5:1
Cylinder heads: 319-T7 cast aluminum with 59.02cc combustion chambers
Valve angles (degrees): 12.5 intake, 12 exhaust
Intake valves: 2.13 inches (54mm) hollow
Exhaust valves: 1.59 inches (40.4mm) hollow sodium
Camshaft: Hydraulic-type with tri-lobe for fuel-pump drive
Camshaft lift: 0.551-inch (14mm) intake / 0.524-inch (13.3mm) exhaust
Camshaft duration: 200-degrees intake / 207-degrees exhaust (at 0.050-inch)
Lobe separation angle: 116.5 degrees
Fuel delivery: direct injection
Intake manifold: “runners in a box” design; composite construction
Throttle: 87mm electronically controlled throttle body
Ignition: 58X with individual coil-on-plug and iridium-tip spark plugs
Horsepower / kW: 450/335 (estimated)
Torque – lb.-ft. / Nm: 450/610 (estimated)
Max. engine speed: 6,600 rpm (fuel cutoff)
![](http://bangshift.com/wp-content/uploads/2012/10/LT1-630x430.jpg)
Last edited by Ws6kid.; 10-24-2012 at 10:43 AM.
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^^^ I believe you are correct. There are quite a few enhancements going into this GEN5 motor. I am most excited about the direct injection system, apparently there is an extra cam lobe that drives the DI pump, which is fed by an in-tank fuel pump. I wonder how more fuel will be delivered when guys starting modding these, guessing it will be done via tuning?
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^^^ I believe you are correct. There are quite a few enhancements going into this GEN5 motor. I am most excited about the direct injection system, apparently there is an extra cam lobe that drives the DI pump, which is fed by an in-tank fuel pump. I wonder how more fuel will be delivered when guys starting modding these, guessing it will be done via tuning?
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The DI pump, looks like it is fed by a traditional in-tank pump. CP is from GMinsidenews
"cam-driven fuel pump: The direct injection system features a very-high-pressure fuel pump, which delivers up to 15Mpa (150 bar). The high-pressure, engine-driven fuel pump is fed by a conventional fuel-tank-mounted pump. The direct injection pump is mounted in the “valley” between cylinder heads – beneath the intake manifold – and is driven by the camshaft at the rear of the engine. This location ensures any noise generated by the pump is muffled by the intake manifold and other insulation in the valley."
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The DI pump, looks like it is fed by a traditional in-tank pump. CP is from GMinsidenews
"cam-driven fuel pump: The direct injection system features a very-high-pressure fuel pump, which delivers up to 15Mpa (150 bar). The high-pressure, engine-driven fuel pump is fed by a conventional fuel-tank-mounted pump. The direct injection pump is mounted in the “valley” between cylinder heads – beneath the intake manifold – and is driven by the camshaft at the rear of the engine. This location ensures any noise generated by the pump is muffled by the intake manifold and other insulation in the valley."
"cam-driven fuel pump: The direct injection system features a very-high-pressure fuel pump, which delivers up to 15Mpa (150 bar). The high-pressure, engine-driven fuel pump is fed by a conventional fuel-tank-mounted pump. The direct injection pump is mounted in the “valley” between cylinder heads – beneath the intake manifold – and is driven by the camshaft at the rear of the engine. This location ensures any noise generated by the pump is muffled by the intake manifold and other insulation in the valley."
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I reall think GM hit this one out of the park..NA,DI, DOD, cVVt, 450hp-450ft.lbs (VERY CONSERVATIVE RATINGS) 6600rpm fuel cut off...And the ability to run 0-60 in under 4sec in the C7...SMDH CAN YOU IMAGINE WHAT THIS THING WILL DO ONCE TURBO OR SUPERCHAGED..Or just run off E85
GM has really took some pages from the race book on this one=Forged crank, Scavenge HP fuel system, oil jet piston cooling, oil trap oil pan etc.
No Vette or Camaro for me..But Impala SS, CTSV or ATSV and I'm there..
It will be very nice to see how the 5.3L version stacks up against Fords 5.0 and EcoBoost TTv6?
The new GM full size trucks debut in Dec (production has already begun) and the Gen 5 engine will be in them soo?? Looking up the dates for the LA autoshow now!!
No more LS development from GM though--Long live the LS Baby!
GM has really took some pages from the race book on this one=Forged crank, Scavenge HP fuel system, oil jet piston cooling, oil trap oil pan etc.
No Vette or Camaro for me..But Impala SS, CTSV or ATSV and I'm there..
It will be very nice to see how the 5.3L version stacks up against Fords 5.0 and EcoBoost TTv6?
The new GM full size trucks debut in Dec (production has already begun) and the Gen 5 engine will be in them soo?? Looking up the dates for the LA autoshow now!!
No more LS development from GM though--Long live the LS Baby!
Last edited by Anthony Williams; 10-24-2012 at 01:27 PM.
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^^^ I believe you are correct. There are quite a few enhancements going into this GEN5 motor. I am most excited about the direct injection system, apparently there is an extra cam lobe that drives the DI pump, which is fed by an in-tank fuel pump. I wonder how more fuel will be delivered when guys starting modding these, guessing it will be done via tuning?
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Jesus ******* christ. Aside from the design looking awesome so far, there are 24 other letters of the alphabet they could have used other than the same name that has been accompanied by laughter for the past 14 years.
Also i wonder how much power the stock DI system will support before being upgraded, if at all.
And i wonder how hard it will be to crack the new OS.
Im really excited about this. Hopefully megasquirt comes out with a unit soon so people can do conversions easily.
Also i wonder how much power the stock DI system will support before being upgraded, if at all.
And i wonder how hard it will be to crack the new OS.
Im really excited about this. Hopefully megasquirt comes out with a unit soon so people can do conversions easily.