Ls1 VS Lt4

[bikelite]

MM I have a chance to pick up an Lt4 engine out of 96 Vett , they say they will out Rev out pull and out preform the early ls1 engines and then a toss up for the 2001, 2002 ls1 engines because they got a few tricks from the ls2. your thoughts.

[bikelite]

Im looking to buy as I posted but MMMM could buy a 93-97 fire_ cam and dump an lt4 into it MMMM lt4 11 to one , and red line of 6500! MMM

[bikelite]

What was the real HP of Lt4, I have read something very intro about the lt4 that it responded so Quick and MAXXed it full power that the ls1 was looking DOA! your thoughts.

[SMWS6TA]

I would never consider a LT1 or 4 over a LSx engine unless it's the current generation of LT series.


With just a cam I could out perform the LT1/4 of that generation on a LS1. Even the Gen III and IV 5.3's outperform them.


What are your goals? It would be easier to make a recommendation based on that.



Now to be fair there is a LT1 f body that has set the stick shift record as being the fastest manual car. But there is a lot more to getting that goal then just an engine.

[Tomtrimman]

The Ls1 or any LS engine is much better choice than the old lt4 .. sure it’s a decent engine that makes okay power but has no where near the aftermarket support the ls engines have .. I won’t dog the old LT engines because they were my humble beginnings however, A 4.8 with some longtubes would make the same power as a lt4 . and you could find them in a junk yard lol

[Whamhammer]

The Gen II LT4s were advertised at 330 hp, so I would say less than 300 rwhp, on a fresh setup.

The only reason to go with a LT4, is that the car its going into is already a Gen II LT1, and that the cost of it would he less than a conversion to a Gen III/Gen IV.

A well built TPI engine, with an improved intake and ignition coil system will run all day with a similar setup Gen II.

A Gen III/IV truck block is going to be way cheaper to get, and upgrade to killer power levels.

[Whamhammer]

I would never consider a LT1 or 4 over a LSx engine unless it's the current generation of LT series.


With just a cam I could out perform the LT1/4 of that generation on a LS1. Even the Gen III and IV 5.3's outperform them.


What are your goals? It would be easier to make a recommendation based on that.



Now to be fair there is a LT1 f body that has set the stick shift record as being the fastest manual car. But there is a lot more to getting that goal then just an engine.

Heck, buy putting Long tube headers, y pipe, and cat back, any LS1 would handily out perform even the stoutest factory gen II.

[DarrenWS6]

Heck, buy putting Long tube headers, y pipe, and cat back, any LS1 would handily out perform even the stoutest factory gen II.

This.

My '00 LS1 with 853 heads has LS6 intake, EGR/A.I.R delete, 1.75" Longtubes, 3" OR/Y, GMMG catback, and dyno tuned on 93 made 360rwhp & 367ft lbs.

[RareSS]

What was the real HP of Lt4, I have read something very intro about the lt4 that it responded so Quick and MAXXed it full power that the ls1 was looking DOA! your thoughts.

My 97 Camaros SS, Joanie is the last of the original LT-4 Camaros. She has the “balanced and blueprinted” engine from the factory. She has 350 hp and not 330 hp of the LT-1 Camaro SS.
Comparison between her and my 02 Camaro SS with the 345 hp LS-6 engine? It would be a very interesting race! I can tell you that the LT-4 pulled a lot harder off the get-go and through the gears! The end results? I couldn’t answer.