LS1 LT1 LO3 L98 whats difference between em?

 

LS1 is the third generation v8 found in the 1998-up fbodies and corvettes (vette might have had it in 97, not sure). The new truck engines (4800, 5300, 6000) are similar to this engine.

LT1 is the second gen v8 found in 92-97 vette and 93-97 fbodies

L98 is a first gen roller 350 sbc with TPI fuel injection. This has the same basic design as all small block chevys since 1957. Many small changes over the years but same basic design.

I think LO3 is the TPI 305. Also a first gen roller block.

 

he's right about everything except the LO3. The LO3 was the enemic 305 TBI, rated at 170 hp. It could be found in 88-92 f-bodies and some trucks.

 

Wasp,

What SlickRock is saying is that those designations are the factory Regular Production Option codes (RPO codes) for the engines installed in GM vehicles. Each one is a "family" and there are slight variations among each family. The LT1 in a Corvette got a slightly different camshaft than those in the 'B' cars, even though the engine was still classified as RPO code LT1.

Here are some examples of GM RPO codes for engines:

 

man that vader is one sharp ***** thnx

 

Holy crap, please say that avatar is you..

 

Vader,

Whats that LZR DOHC v8? I've never heard of such a beast.

 

Just one more correction, the last year for LT1 in the vettes was 96 I believe. Didn't the LS1 start in 97?

 

LZ7 is a corvette motor, LT5 was left out, maybe because it would be the same on that chart as the LZ7.

 

LS1 was put into the fbody in 98, so it may have been in the 97 vette.

 

The Vette got the LS1 in '97, a year before F-Bodies. It also got the LT1 in '92, a year before F-Bodies.

 

That is an old chart from about 1993. That was the VIN 'J' engine in the Corvette, also known as the LT5. It displaced a bit over 348 inches with a 3.900" bore and 3.66" stroke. Each of the heads had two camshafts, with four valves per cylinder. It was built for Chevrolet by Kiekhaffer/Mercury Marine, and was balanced for high RPM operation even with the longer stroke. As I recall, it was only offered for two years in the ZR-1 Corvettes.

The surprising thing is that a lot of the case design and dimensions of the LS1 and LS6 engines is amazingly close to the design of this engine. Even the deck heights are the same. It appears that the relationship between Chevrolet and Mercury Marine was mutually beneficial.

 

the LT5 came in ZR-1 vettes from 1990-1995

 

Thanks for the correction. I've never been close to the hood of that many 'Vettes, and most ZR-1s I've seen have only been from the rear....

 

On the 'E' entry, shouldn't that be L03 rather than L89? I've never heard of the L89...is that a typo or are there two different RPO codes for throttle body injected 305s?

 

vader, just curious what you do for a living?