SHDY 5.7

So....I'm hearing that the 98 ls1 cars are the bastards of the ls1s. Harder to tune,different ecm,weaker motors,etc. Any reality or fact to this?

Now,if the ecm is different,can I switch it to a later year ecm? If so,how and what do I need to do it?

I'm just looking for clarity on why and what makes them different. We don't plan on going crazy with the mods,but it will get the typical stuff,full exhaust,lid,radials,converter,maybe some gogo juice.

Sorry for seeming naive,but I've crossed over from lt1s to ls and Wanna learn as much as I can.

LS-ONE_DAY

98's are a little different yes. I'm not in expert on them by any means so some of the below response is going to be strictly an "IIRC", that being said.

98's do have a different PCM. In order to switch it I think it requires a whole new wiring harness. I doubt they're much harder to tune as long as you go to someone who knows what the heck they're doing. They have a smaller fuel tank but slightly bigger injectors. A4 cars will have a slightly stronger stock flexplate than 00-02 cars. Obviously the 98-00 cars come stock with the LS1 intake while 01-02s got the LS6 which flows a little better. 98's come with EGR and AIR systems which may or may not be deleted depending on owner preference (purchase intake/exhaust parts accordingly)

SHDY 5.7

My apologies for calling it a ecm. Pcmcia from here on out lol.

Thank u for the info.

blk/slvr02ss

iTrader: (21)

I had a 98 Z-28 A4 w/ off road y-pipe,Lid and free mods and Nitto's and ran 13.1 and everything else was stock so there not that much off the other yrs.

LS-ONE_DAY

No worries, the terms are a little confusing as to what they actually are, they're almost the same thing, just slightly different.

For reference - https://ls1tech.com/forums/pcm-diagn...cm-vs-ecu.html

And no problem.

SHDY 5.7

Is there a free mod how to on here,any where?

The car seems to make great power. Lt's and ORY are next.

777

iTrader: (21)

https://ls1tech.com/forums/1740880-post2.html

SHDY 5.7

777 ftw!

blk/slvr02ss

iTrader: (21)

They are on here yes.Lid,P&P TB,LT & Off road y-pipe,Pully and some suspension and 12's no problem.

SHDY 5.7

I searched "free mods",got Nothing. Anyone have a link?

blk/slvr02ss

iTrader: (21)

Google Free Ram Air Mod !

SHDY 5.7

Will do. Any others?

LS-ONE_DAY

Throttle body bypass and the ram air are the big two. Also EGR and AIR deletes.

blk/slvr02ss

iTrader: (21)

There is one for the EGR Tube that blocks air flow but i would just remove the EGR set-up .

777

iTrader: (21)

Check out the yellow stickies at the top of each categories home page. They will typically have most of the answers to your questions as well as info that you want to know, but just didn't know about

Here's a great place to start though (located at the top of this forum section)

Ultimate How-To's