'98 ls1 compared to '01 ls1
Thread Starter
Drifting
Joined: Jun 2006
Posts: 1,730
Likes: 4
From: Delray Beach Florida
'98 ls1 compared to '01 ls1
Howdy, well i've got a 98 ls1 vette. when i look up aftermarket parts they are often seperated into 97-99 and 00-04 modifictaion groups. I've tried my dambest to figure out all the differences but i just cant seem to find a list. I searched this site, and gone through the stickys. maybe i missed it if so can someone link me, If not can someone help me out?
Burning Brakes
Joined: Apr 2005
Posts: 834
Likes: 0
From: Palm Beach Gardens FL
I think the AIR system is different on the exhaust manifolds. Also the MAF has an integrated IAT sensor and different diameter. Also the intake is changed to the ls6 style on the newer years.
Thread Starter
Drifting
Joined: Jun 2006
Posts: 1,730
Likes: 4
From: Delray Beach Florida
hmm interesting. on the 98 there are 2 steel braded lines going in the driver side rail covers and the 01 there is only one, whats that about?
also i think there might be different heads??
also i think there might be different heads??
Instructor
Joined: Jul 2005
Posts: 231
Likes: 0
From: Hinckley, Ohio
As far as I know, the heads (LS1) are the same from 97-04.
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
99-00 had 853 castings
01-04 had 241 castings
02-04 Z06 had 243 castings and I'm pretty sure so did 01.
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Melting Slicks
Joined: Feb 2006
Posts: 2,172
Likes: 104
From: Des Moines Iowa
Stainless steel exhaust manifolds for 97-00, then cast manifolds for 01-04. (slightly better flow from cast iron and better durability) Pre-cats or pup-cats on west coast delivery 00s and all 01s. (pre/pup cats result in loss of approximately 5 hp.) Already noted, that 01-04s have LS6 intake manifold. (gain of 5-10 hp over LS1 intake)
Instructor
Joined: Jul 2005
Posts: 231
Likes: 0
From: Hinckley, Ohio
Good point! I was thinking in terms of port shape/flow, and forgot that early versions had different valve cover mounts.
