Know More About LT1 Engines

Know More About LT1 Engines

Know More About LT1 Engines

The year 2000 saw LT1 being voted as one of the top 10 engines of the last century by Ward's Automotive.

Many types of LT1 were there because General Motors came out with specific versions for specific cars. Engines with a cast iron block and aluminum blocks were fitted in vehicles like Corvette, Super Sport and Z28 because these were performance vehicles. Those with cast iron blocks and cast iron heads were earmarked for vehicles like Buick Roadmaster, Chevy Caprice, Cadillac Fleetwood and Impala, these being standard vehicles. While those used on the Corvette came with four-bolt main caps, others had two-bolt main caps on the blocks.

There are some parts in LT1 engines that are interchangeable with the engines of the previous generation. Parts like rotating assembly consisting of crankshaft, pistons, engine mounts, bell housing bolt pattern and connecting rods of the old generation can be used in LT1 also.

The "reverse flow" system used in this second generation engine is its new and most interesting feature. This helps in maintaining lower cylinder temperatures. So, the engine is allowed to run at a higher compression than the previous engines of the General Motors. As in the third generation LS1 engines, in LT1 engines with aluminum heads, the cooling system cools the heads first and the block comes next. This feature, along with the electric controls of the engine, is responsible for giving LT1 a longer life. The engine is also fuel efficient because of this feature. You also have features like airflow and crank position sensors.

It was from 1994, the mass airflow sensor and sequential port injection have been opted for. Transmission has been made more capable because a computer-controlled system has been introduced. This system is called Powertrain Control Mode or PCM. The PCM is reprogrammable through a diagnostic port.

The LT1 has got a 4 inch bore and a 3.48 inch stroke. It can displace 5.7 liters and in British system, it comes to about 350 cubic inches. In the initial version, the compression ratio was 10.4:1 but in the later version of LT4, there was a slight boost in the compression ratio to 10.8:1. Powdered metal is used for making the connecting rods. For performance vehicles like Corvette, the heads are made with aluminum. There are two valves per cylinder, the diameter of each valve being 1.94 inches. In the later version of LT4 engines, the diameter of the valves has been slightly increased to 2 inches. These slight changes in the later version of LT4 do not in any way affect the horsepower and torque of the engines.

The LT1 engines, launched in 1992, could generate a horsepower of 300 and with a 340 foot pounds of torque, the vehicle could get a quick acceleration and pulling power. These 1992 versions could enable the car to achieve a speed of 60 miles per hour in 5.7 seconds. Corvette of 1994 could achieve the speed of 60 miles per hour in 5.5 seconds with an improved version of LT1 and an automatic transmission.

Our concerns revolve around spending enough time with you to help decide which particular LT1 engine is:

#1. The proper replacement part number to match your car exactly, and

#2. To supply you with one of our crate engines for sale that is possibly only an "off the shelf" engine for a special need.

Visit us at LT1 engines for sale

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