RPM WS6

iTrader: (3)

'98 had the same sized injectors as '01+.

'98-'99 had different manifolds. '00+ got the new ones.

No "pup" cats on F-bodies. That's a vette only deal. All years LS1 F-body had only 2 cats (one per engine bank).

RPM WS6

iTrader: (3)

Yes you can, but I wouldn't worry about it unless you're already in there doing a cam swap or something. Probably less than 1% of these cars had a faulty pump from the factory, it's a very, very rare failure.

LS1DER

iTrader: (6)

I love the threads talking about the differences in the 98-02 ls1's I just seem to get more confused about all the differences.

greysteel_M6

iTrader: (5)

-just when I think I got it down

KW4life06

iTrader: (12)

on that link posted with all the differences on it, it says in 2000 there was a smaller cam and injectors. is the smaller cam the vortec truck cam mentioned in the 01+, or is it just different than the 98 99 01 02?

RPM WS6

iTrader: (3)

Never noticed that before.

The '99-'00 cars do have smaller injectors than '98 or '01-'02, but the '98-'00 cam is all the same. It's the '01+ that gets the smaller cam.

Hope that clears things up for you.

nissanic89

oh ok i see lil confusing but i am grasping it

KW4life06

iTrader: (12)

which cam was better for performance? the 98-00 or 01+

TransAminal

Considering the '98 cam is higher lift and duration than the '01+ cam, I'd say the '98 will offer better performance, all other things being equal.

They aren't any faster stock for stock though, because the '01+ cars had the addition of the LS6 intake manifold over the '98-00 LS1 manifold, so it evens out with the cam.

2001stripper

The cam in 01-02 f-bodies are the same ones used in the 6.0L Chevy Truck. They may make very slightly less horsepower but they more than make up for it in torque production. My car made 346 rwhp and 364 rwtq with the only power addition being full exhaust.

RPM WS6

iTrader: (3)

Yes, generally the '01+ cam will make a bit more torque and also produce more power/torque at lower rpms. But the LS6 intake helps it to out-dyno a '98-'00 motor stock for stock.

Asmodeus

this thread needed ONE response!

https://ls1tech.com/forums/new-ls1-owners-newbie-tech/213148-jrp-s-faq-commonly-asked-questions.html

Read the stickies! This particular sticky is even in THIS forum.

RPM WS6

iTrader: (3)

I already posted that link back on the first page. But often it seems that people like to still rehash the issue.

Asmodeus

well then very good post!

BAD WS6

iTrader: (14)

I have a 2001 WS6 with LS1 and LS6 intake manifold. I used to get ticking and knocking noises pretty bad. After extensive research, testing and parts replacements at the local dealership, they couldn't figure out what was still causing the problem. Sounded like a lifter so they replaced my lifters. Noise still came back. Few more times in the shop with more parts being replaced, the noise still wouldn't go away. They brought out a GM rep who decided it was time and I was favorable for a new long block. They kept my car for a week and got it all back together and the noise was gone. Every once in a while it would show up but nothing like it would with the old engine.

Come to find out that all 2001 LS1 engines in Camaros, Trans Ams, Firebirds, and Vettes had different valves and springs in them that were lighter saving some weight and at the same time allowing it to rev up higher faster. With that being said, that's what contributed to my oil consumption I saw. I was using at least a quart of oil a month adding to it. I didn't rev like I used to anymore which was sad, but I didn't go through oil like I used to either. I have tuned it and modified the car now that it doesn't matter.

I love having my engine have half the amount of miles on it that my car has!