Its maximum performance ratings (as installed in 1996 Corvettes) were 300 hp (224 kW) and 340 lb⋅ft (461 N⋅m) - well above the 275 net hp and 255 net hp ratings for the original LT-1 in 1971 and 1972, and the 300 ft lb (est) net torque for 1971 and 280 ft lb net for 1972. References
Full Answer
How much HP does a LT-1 have?
For the first year the LT-1 was rated at 370 hp (276 kW) in the Corvette and 360 hp (268 kW) in the Camaro - both of these being brake horsepower (bhp) gross hp ratings. Despite the disparity between the two cars' listed hp there was no difference between the engines.
Why did GMC change the LT1 engine?
GM changed the design for the Generation II LT1 small block with aluminum heads and reverse-flow cooling, meaning the heads were cooled before the engine block. This allowed higher compression ratios, resulting in more power and gas mileage, and reduced emissions. One of the other major changes was the distributor.
Is the LT1 engine still in the Camaro?
While it was advanced for the time, it should not be confused with the current-generation LT1 engine powering the sixth-generation Camaro. The old LT1 was only stuffed into the engine bay of the mid-'90s Camaro and Firebird V8 models, plus the C4 Corvette and smaller displacement versions made it into the Chevy Caprice and Buick Roadmaster.
When did the Chevy LT-1 come out?
History Chevrolet introduced the 350 cu in (5.7 L) LT-1 in 1970, making it available in both the Corvette and Camaro. It was an optional engine in the Corvette, and available and as part of the high-performance ZR-1 option. Between 1970 and 1972 only 53 ZRs were produced, making it one of the rarest Corvettes.
How much horsepower does a stock LT1 make?
In contrast, the 376-cubic-inch (6.2L) LT1 offered in the 2016 Corvette Stingray is rated at 460 horsepower with the optional exhaust system. That's 1.22 horsepower for every cube—a nearly 70 percent increase in efficiency from the same basic, naturally aspirated air pump design.
How much horsepower does a 5.7 LT1 have?
LT1 legacy Displacing 350 cubic inches (5.7L), with a compression ratio of 11:1, it was rated at 370 horsepower at 6,000 rpm and 380 lb. -ft. of torque at 4,000 rpm.
How much HP can a stock LT1 hold?
The stock LT1 fuel system is good for about 600rwhp, much past that and you need to upgrade the fuel system, and the stock ZL1 fuel pump doesn't take you much further. If you're spending the money to do that then you might as well put in a new cam, heads, forged pistons, etc.
How much horsepower does a 93 LT1 have?
1993 Corvette Powertrain SpecificationsEngine:LT1 5.7 OHV 350 V-8. Multi-Port Fuel InjectionHorsepower:300 HP @ 5,000 RPMTorque:340 lb-ft @ 3,600 rpmFuel Delivery:Multi-Port Fuel InjectionFuel Capacity:20.0 Gallons14 more rows•Aug 7, 2021
Is the 5.7 LT1 a good engine?
Overall, the LT1 is a very reliable engine. The OptiSpark distributor problem is really the only issue that is pretty much guaranteed to happen on this engine. Head gaskets are generally good so long as the engine isn't overheated.
What does LT LT1 mean?
LT1 means its almost fully loaded. You have the features of a CD player, nice rims, power windows, power locks, ect.
How much is a LT1 engine worth?
1992-1997 LT1 LONG BLOCK ENGINEENGINE SIZEBASE PRICEPURCHASELT1 Long Block 383 / 500hp$7,999 Buy in monthly payments with Affirm on orders over $50. Learn moreBuy NowLT1 Long Block 396 / 550hp$9,599 Buy in monthly payments with Affirm on orders over $50. Learn moreBuy Now2 more rows
Is the LT1 better than LS1?
LS1 engines are lighter than LT1 engines. LS1 engines have better heat dissipation than LT1 engines. LS1 engines produce more power than LT1 engines. LS1 engines are distributorless system while LT1 engines are not.
How much boost can a stock LT1 handle?
The LT1 can handle up to around 700rwhp reliably, but there have been cases before that and after that where the ring gaps have caused issues.
What cars have the 5.7 LT1 engine?
The old LT1 was only stuffed into the engine bay of the mid-'90s Camaro and Firebird V8 models, plus the C4 Corvette and smaller displacement versions made it into the Chevy Caprice and Buick Roadmaster.
Is the LT1 the same as a 350?
The LT1 moves more air by being able to run higher RPMs. The engine is designed to allow the motor to run higher RPM. Solid lifters, 6500 rpm redline, aluminum intake, huge (780 cfm) Holley carb. Basically, an LT-1 is the 350 ci version of the Z-28.
Is an LT1 a 350?
LT1 legacy Displacing 350 ci (5.7-liter) with a compression ratio of 11:1, it was rated at 370 hp at 6,000 rpm and 380 lb-ft of torque at 4,000 rpm. It was enough to push the Corvette from 0-to-60 mph in less than 6 seconds.
What cars did the LT1 go into?
The old LT1 was only stuffed into the engine bay of the mid-'90s Camaro and Firebird V8 models, plus the C4 Corvette and smaller displacement versions made it into the Chevy Caprice and Buick Roadmaster. The LT1 powered police cars and taxis, too, and really only had one problem.
What engine did the mid 90s Camaros have?
A natural drag racer with their fairly light weight, rear wheel drive, strong transmissions, and simple suspension, the mid-'90s “F-body" cars also featured a stout 350-cubic-inch LT1 V8. This engine featured a new distributor ...
Why is the Opti a low mounting?
While it worked perfectly in a lab or on bright, sunny days at GM's proving grounds, low mounting on the front of the engine meant the Opti suffered from exposure to road water, grit, and salt far more than the typical distributor. Being under the water pump, if that part failed, it took the distributor out with it.
Is the LT1 a solid engine?
The LT1 is a solid engine, with horsepower and torque to spare, and a large aftermarket for performance upgrades. By fixing this one issue, it should be set for many more years of trouble-free driving. Last updated June 6, 2018.
Is the LT1 a lifetime unit?
Many owners assumed the LT1 cap and rotor were lifetime units that didn't need servicing, and only paid attention to it when the Opti needed replacement.
Development
Operation
- While a traditional fuel-injected small-block Chevy V8 had the distributor at the rear of the engine block, the LT1 featured a new type of optical sensor placed on the front of the engine. This sensor is able to see\" the LED light passing through a spinning reluctor wheel (fancy name for slotted disc) in one-degree increments. While the previous Electronic Control Modules had no idea whic…
Usage
- While it was advanced for the time, it should not be confused with the current-generation LT1 engine powering the sixth-generation Camaro. The old LT1 was only stuffed into the engine bay of the mid-'90s Camaro and Firebird V8 models, plus the C4 Corvette and smaller displacement versions made it into the Chevy Caprice and Buick Roadmaster. The LT1 powered police cars an…
Issues
- While it worked perfectly in a lab or on bright, sunny days at GM's proving grounds, low mounting on the front of the engine meant the Opti suffered from exposure to road water, grit, and salt far more than the typical distributor. Being under the water pump, if that part failed, it took the distributor out with it. Even a $20 radiator hose could split and cost hundreds of dollars in parts …
Criticism
- Looking back, it's a hilariously poor design execution, as the slightest bit of water from cleaning an engine bay can cause Optispark problems, sometimes as early as 20,000 miles. Also, it has a conventional cap and rotor design, but due to the location behind the water pump, they are much harder to service than a conventional distributor. Many owners assumed the LT1 cap and rotor …
Facts
- GM's \"solution\" was to replace the failing unit with another Opti that has the same faults and will have the same failure. Under warranty, this costs the owner nothing, but the factory warranties have long ago expired, making this repair cost several hundred dollars at the dealership.
Symptoms
- Symptoms of a failing Optispark are typically poor engine performance, hesitation on accelerating, stumbling and excessive vibration, audible misfiring, and the associated check engine\" codes.
Cost
- Instead, the best cost-effective solution is to go with a superior aftermarket parts. MSD, CarQuest, BWD, Pertronix, and others build replacement optical distributors that are more reliable than the original unit, for a lower price. The drain holes on the bottom are larger than factory units, and a newer vented design uses a fresh air source and vacuum tube to keep gases and moisture from …
Performance
- The LT1 is a solid engine, with horsepower and torque to spare, and a large aftermarket for performance upgrades. By fixing this one issue, it should be set for many more years of trouble-free driving.