Anyone know?

 

yes

 

yeah I've heard about the heads on the 98s not beening as good ( not sure about that ), later produced 99s came with little better block (better oil distro) and I'm sure the list goes on and on this is all I can thinkof right know

 

98 have a working temp gauge... all other f bods got shafted with a dummy one

i think 99 has a different lb injector i think it is 28 vs 26....

that is all i can think of

ohh yeah and i think the 98 computer is completely different

 

The 98's have perimeter valve cover bolts and the coils are bolted directly
to the valve cover. On the 99 and up cars they have center bolt valve covers and the coil packs are on a separate bracket.

Another thing I have heard is that the 98 cars make less power than a 99 and newer car (stock). not sure if its a combination of the heads and the pcm or what?

 

1998

1. Had differnet casting heads which had perimeter bolts and valve covers.
2. Ignition coils were mounted to the valve covers one at a time.
3. The water temp gauge actually works.
4. 98's do have an oil life monitor, they just don't tell you anything when its time for a change. You can find it in Auto-Tap
5. WS6s had single outlet exhaust (all others had duals)
6. Steering wheel controls were completely different part with indentations on the buttons, and were better built
7. Only year that Purple, Gold, and Green were available
8. Some very early Trans Ams came with LT1 style headrests
9. Rear hatch release was poorly designed and often caused problems releasing mechanism
10. Early model 98 Monsoon stereos didnt have capability to control 12-disc CD changer
11. 1998-1999 automatic transmission LS1s could be started in 1st gear even with the shifter in 2nd. Starting 2000, if you put the shifter in 2, it would start off in 2, even from a stop.
12. 1998-1999 LS1 cars had a smaller throttle body cam, which caused the throttle to open to WOT faster than 2000+ cars
13. 1998 cars had 28 lb fuel injectors from the factory
14. 1998-2000 cars had a larger cam than the 01-02 cars
15. 1998-1999 cars had more restrictive exhaust manifolds
16. 1998-2000 cars had an LS1 intake with EGR
17. 1998 and some early 1999 cars had blue outside rear view mirrors (TA/Formula only)
18. 1998 only LS1 blocks had a much smaller cylinder sleeve that only tolerated a .005" hone
19. Last year F-body to use the old 15.5 gallon steel fuel tank.
20. Only year LS1 F-body to contain a gascap with a tether long enough to actually hang from the fuel door while open
21. Only year LS1 F-body to not contain the famous GM black box used in the event of an accident to record up to 5 seconds of pre-crash data
22. 1998 only cars had a different PCV system with the PCV valve located above the passenger side valve cover
23. 1998 most cars did not have an idle adjustment screw on the throttle body. Some 98 cars do have the idle throttle stop set screws.
24. 1998 cars have a completely different PCM from 99+ cars
25. A production shortage of F-body cams caused the use of a C5 cam to be installed in F-body LS1s for a very short time
26. 97-98 LS1's used a paper water pump gasket. The only gasket that isn't reuseable
27. SSs did not ALL go to SLP starting in 98. Y2Y was the RPO code that sent them to SLP for additional options
28. SS option did not "include" the Synthetic oil package, it was a SLP only Option

1999

1. 1999-2000 cars switched to 26 lb fuel injectors
2. Cylinder heads and valve covers redesigned to have center bolts instead of perimeter bolts. Other than that, the heads were the same.
3. Redesigned cylinder sleeves that allowed for a small bore, up from .005" in 1998 models.
4. Midyear model change to a cheaper steering wheel audio control button without finger indentations, and cheaper built
5. 1999 cars continued the LS1 intake with EGR provisions
6. 1999 cars continued more restrictive exhaust manifolds and larger cam
7. Only year that Hugger Orange was available (Camaro only)
8. 30th Anniversary Trans Am available with special blue and white paint package and blue clear coated WS6 wheels
9. Switch to larger 16.8 gallon plastic fuel tank to meet new emissions requirements.
10. Gascap tether was shorter and could no longer be used to hang on the gas door when open.
11. Company wide change added black boxes to record up to 5 seconds of data before a crash
12. Rear hatch release was redesigned with stiffer spring that released the hatch better
13. Water temp gauge was redesigned to work basically as a dummy gauge and only show an overheat condition.
14. An oil life monitor was added to all LS1s, thus changing the gauge cluster a little to show the oil life reset swtich
15. 1999-02 cars had a different PCV system with the valve located to the side of the intake manifold
16. Early production 1999 Trans Ams still had the blue outside mirrors, but a midyear change went to the non-tinted ones
17. 1999 there was the color "Medium Blue Metallic" which was available on both the Camaros and Firebirds. Only one year of that colo

from ls1tech

 

Actually the 99's typically dyno the lowest. They have the weaker intake/exhaust manifolds like the 98's do, but they have smaller injectors and less aggressive timing.

 

So the 98 is the car to have and they both really benifit from new intake manifold and headers.Oh well yesterday I put a price on 98 at auction hope I get it, anyone used a hypertech tuner on a 98 and did you get good results?

 

im just trying to get a 98-02 so i might end up getting a 98-99 ill be doing exhaust/intake immeditaly anyway to get rid of the lean timings on the 99? just send it in to get tuned?

 

im probably gonna be getting a 99" Camaro SS.. Auto

 

don't waste your time with the hypercrap programmers.

the only usefull thing they have is reading codes, and adjusting rev limits, shifts and gear/tire changes.

for less than a new HPP you can have Ion at www.madz28.com reprogram the computer for much better results.

 

knowing what I know now I'll be getting a 99+ fbody my next time around...just for the difference in computer its worth it.