ok so i have a 94 camaro z28 a4. the car is boone stock. Now what i have been seeing alot is people doing LT4 mods. First thing is i want to know what cars came factory with the LT4. Second is what is the difference between an LT1 and LT4 intake? can an lt4 intake bolt on to an lt1 and now its an lt4? what about this LT4 KM (knock module?)i has heard people putting these on thier lt1s. what does that do , wouldnt it throw off the computer? sorry for the ignorance i am just wondering. i was always big on GM performance over aftermarket IMO also whats hp ratings on lt1 vs lt4s?

 

LT4 came in 96 vettes that were 6 spd, a hundred or so 97 camaro SS and 27 97 firehawks. It is rated at 330ish I believe compared to the LT1s 275-285. It has different heads, rockers, camshaft and intake manifold. No you cannot just bolt on an LT4 intake and make your car an LT4, it wouldn't even provide gains since the heads wouldn't match the intake. The LT4 knock module reduced false engine knock since its not as sensative, no it does not throw off the computer.

 

I found this awhile back, enjoy: http://www.malcams.com/legacy/misc/LT4.htm

 

thank you very much guys for the answers. real quick i have another question. The LT4 hot cam......i am assumeing this is the oem peice for and GM production LT4? would this cam have am idle lope to it that comes with larger camshafts? and its usually best to install a cam if your doing a motor rebuild not at a hundred grand right??? thanks again-Mike

 

the hotcam is called the lt4 hot cam cause it is an upgraded cam shaft from the base lt4 cam,it is has a nice mellow lope at idle it pulls waaaaay harder with all the proper lt4 upgraded parts and a pcm tune,headers you will notice a small drop in fuel mileage between 1-3 mpg as i noticed but a small sacrifice to have a performance orientated combo that will hang with modded ls1s,especially on the freeway they wont be walkin away from you,at all!

 

thats awsome man, so i would literally need a complete top end to have the proper LT4 parts combo?

 

If you really want to get technical, the LT4 crankshaft was slightly different also. It's no major change though.