I am fairly certain I know the main differences between the 98-99 LS1s and the 01-02 LS1s , but what about the 2000 model year. I thought they were still the same as the 99s, but my buddy, who has a 2000 (he lives in another State) says he has the cast iron manifolds, does he have the LS6 intake then too.....? He said he had to do the egr mod, but if he has the LS6 intake he can't do the egr mod (no egr tube), so I'm sitting here a little confused...any help appreciated.

 

The 2000 does not have the LS6 intake. As for the rest of your questions--->

 

What about you exhaust manifolds then, do you have cast iron as well....?
Seems like you would need the LS6 intake if you were given the crappier cast iron manifolds as compared to the 98-99 shorty header style manifolds.....?
Is it possible late model year 2000s got the LS6 intake and cast manifolds...?
What about the cam for 2000, is it the truck cam in the 01-02s....?
questions questions

 

It is possible for late 2000s have the new intake, but not likeley. That would change the rating of the engine, and you would get something for nothing. As for iron manifold, they should be magnetic. I don't know if the other option would be, too. I'd got outside and check, but it's raining cats and dogs outside.

 

The 00's did not get the 01-02 intake thats on the ls6 and ls1. that is why it is a 00

those crappy cast iron manifolds are actually better then the 98-99 pieces. allthough they look like crap. they preform well.

 

I don't think you'll ever get me to believe the cast EMs are better than the shorty headers that come on the 98-99s. I believe GM choose the cast ones after they decided to put the LS6 intake on and change the cam, and they did so to impede performance. Seems to make sense because anyone who does headers on an 01-02 gets a great increase, because all of the potential that is there due to the LS6 intake and cam. The cast EMs are holding back the power. The surface friction on cast parts is aweful too, also restricting flow.............
Need answers people..............!

 

The Dyno #'s people are getting by goin to a shorty header on the 00-02's show the facts. its pretty much accepted at ls1tech that this is the case.

Also, the cam thats in the 01-02 cars are NOT the LS6 cam. they have a "truck" cam, which is actually smaller than the previous year cams.

in 01, GM retarded spark timing to detune the cars. Not only was this said by Scott Settlemire .....Its coming knowledge if you have been around long enuff to see what people are getting for timing...

Surface friction? The area on the surface of the tube doesnt move anyways. granted pits or a really rough(bumpy) surface my cause soe turbulance and or decrees total flow area but, all things being equal, one surface isnt better or worse.
any of you litterate collage types wanna elaberate on this..?

You asked for answers, if your not willing to believe any of it why ask?