LS-1, LT-1 and such

BondAtomic · August 7, 2003

Alright. I feel like I know jack.

LS-1 means what exactly? Is it the engine/ignition type? Does it have to do with the coil per cylinder system? What does LT-1 mean? And HEI stands for???

Thanks!

BondAtomic · August 7, 2003

I guess from the previous posting, all I am wondering is if MSD wires for an LS-1 Truck will fit my 02 Silverado, with the 5.3. It says LS-1 Truck, and I really would like some MSD wires...

John

vortec4800 · August 7, 2003

LS1 is the type of engine block we have in our trucks. I would go into my detail about what LS1 means exactly but I don't want to give out false information, so I'll leave that to the experts.

To answer your question about the MSD wires, yes they will fit - I have them on my truck and they're great.

99-2door · August 7, 2003

The LS1 is the engine introduced in the 97 Corvette. LS-1 specifically refers to the aluminum block 5.7L used in Corvettes, camaros, Trans Ams, etc. The LS1 has a individual coil for each cylinder and multi-port injection. The LS6 is basically a higher performance upgraded LS1.

The 99+ NBS 4.8L, 5.3L, and 6.0L are iron block derivatives of the LS-1. They feature aluminum heads (some 6.0L have cast heads I think) and individual coil packs as well. Collectively all the engines are sometimes referred to as LS1 style. First new SBC engine block design in trucks.

The LT1 was introduced in 92 on the Corvette (well actually in 1970 as a solid lifter motor, but that is a different story altogether, in its modern form 92). Used in Camaro, Trans Am, Caprice, Impala SS etc. The LT1 was a 5.7L with aluminum heads in Corvette and cast heads in other applications. Featured Multi-port injection. Different block design than traditional SBC. There is also an upgraded LT4 version.

HEI= High Energy Ignition. Used since some point in the early 70s till around 86 on trucks. HEI is a electronic controlled ignition system that replaced points and condensor system, and resulted in a more consistent higher energy spark. Stock HEI has the coil built into the distributor assembly although some aftermarket coils are seperate.

Bruce03Silverado · August 7, 2003

The LS1 is the engine introduced in the 97 Corvette. LS-1 specifically refers to the aluminum block 5.7L used in Corvettes, camaros, Trans Ams, etc. The LS1 has a individual coil for each cylinder and multi-port injection. The LS6 is basically a higher performance upgraded LS1.

The 99+ NBS 4.8L, 5.3L, and 6.0L are iron block derivatives of the LS-1. They feature aluminum heads (some 6.0L have cast heads I think) and individual coil packs as well. Collectively all the engines are sometimes referred to as LS1 style. First new SBC engine block design in trucks.

The LT1 was introduced in 92 on the Corvette (well actually in 1970 as a solid lifter motor, but that is a different story altogether, in its modern form 92). Used in Camaro, Trans Am, Caprice, Impala SS etc. The LT1 was a 5.7L with aluminum heads in Corvette and cast heads in other applications. Featured Multi-port injection. Different block design than traditional SBC. There is also an upgraded LT4 version.

HEI= High Energy Ignition. Used since some point in the early 70s till around 86 on trucks. HEI is a electronic controlled ignition system that replaced points and condensor system, and resulted in a more consistent higher energy spark. Stock HEI has the coil built into the distributor assembly although some aftermarket coils are seperate.

Yup, I love that aluminum block in my 02 Firehawk! That motor really responds to mods!! I've got buddies of mine in the f-body club that can be daily drivers and are running 11's on motor with heads, cam and bolt on's.....add a little juice or blower to it and you've got one killer motor!! Now they are proving their worth because when they first came out in 97 a lot of people were skeptical of how durable that aluminum block would be and now that it's been out for a while and people have put close to or more than 100k miles on it, it's proven it's a great motor! Gotta love that LS1

GnatGoSplat · August 7, 2003

I too, am a little skeptical about that aluminum block.

I'm thinking to rebuild my puny 4.8L into something a little more potent.

I was thinking to rebuild it with either a 6.0L block or LS1 aluminum block.

Obviously the aluminum block would save some weight.

Would you say the aluminum block is durable enough for a truck engine?

MarkD · August 7, 2003

The LS1 is the engine introduced in the 97 Corvette. LS-1 specifically refers to the aluminum block 5.7L used in Corvettes, camaros, Trans Ams, etc. The LS1 has a individual coil for each cylinder and multi-port injection. The LS6 is basically a higher performance upgraded LS1.

The 99+ NBS 4.8L, 5.3L, and 6.0L are iron block derivatives of the LS-1. They feature aluminum heads (some 6.0L have cast heads I think) and individual coil packs as well. Collectively all the engines are sometimes referred to as LS1 style. First new SBC engine block design in trucks.

The LT1 was introduced in 92 on the Corvette (well actually in 1970 as a solid lifter motor, but that is a different story altogether, in its modern form 92). Used in Camaro, Trans Am, Caprice, Impala SS etc. The LT1 was a 5.7L with aluminum heads in Corvette and cast heads in other applications. Featured Multi-port injection. Different block design than traditional SBC. There is also an upgraded LT4 version.

HEI= High Energy Ignition. Used since some point in the early 70s till around 86 on trucks. HEI is a electronic controlled ignition system that replaced points and condensor system, and resulted in a more consistent higher energy spark. Stock HEI has the coil built into the distributor assembly although some aftermarket coils are seperate.

great summary. One note though, kind of insignificant actually...the 1970 SBC was noted the LT-1 and the '92 Vette and '93 Camaro ushered in the LT1 (no hyphen).

Bruce03Silverado · August 7, 2003

I too, am a little skeptical about that aluminum block.
I'm thinking to rebuild my puny 4.8L into something a little more potent.

I was thinking to rebuild it with either a 6.0L block or LS1 aluminum block.

Obviously the aluminum block would save some weight.

Would you say the aluminum block is durable enough for a truck engine?

I don't see why not. There's a few crazy guys in my club that run 10's with 100+ shot of nitrous through their LS1's...of course that is with heads, cam and all bolt-ons you can imagine! There's several guys that have over 80k miles on their car, drive them every day and race at the track every opportunity they can. I think the aluminum block has proven itself since it came out in 97. Just my opinion though