[DeMello]

whats the difference from the z28 to ss to rs

i know the like 96-02 z28s are ls1s but which are lt1

also is there a way to tell by looking at them

like with stangs if they have 1 pipe their v6s

[CobraR]

im pretty sure the only differnece between Z28 and SS is an appearance package, rims, stripes, etc. i dunno how to tell on camaros but i could tell ya about TAs, those are easier

[The Manalishi]

93-97 Camaro's are LT1's, they have two square headlights and a pointier nose. The SS and the Z28 are the same engine and there is little to no performance advatage as far as acceleration goes. The SS will handle better because of stiffer springs, bigger sway bars and bigger wheels and tires.

Typically if it has two square exhaust tips its an Z28, some SS's had a single 3 inch exhaust outlet. The sixes reagardless of single or dual the exhaust pipe points down slightly, the V-8's do not.

98-02 are LS1's they have one large headlight cover and a grill that has an oval shape, think of a catfish's mouth. Again the SS and Z28 have the same engine and little or no difference in acceleration the SS will handle better.

The RS is an appearance package and that is all I am also pretty sure that from the factory they were all V-6's but there are a bunch of people that put the kit on Z28's.

[06RedfireGT]

[DeMello]

thanks for the info....

[ReverendDexter]

My understanding is that there are a few years where the SS is LS1, but the Z is LT1?

[The Manalishi]

Originally Posted by ReverendDexter My understanding is that there are a few years where the SS is LS1, but the Z is LT1?

No that is not the case. The either have one or the other. There were no differences engine wise between the SS and the Z28. The either had LT1's or LS1's not both in the same model year.

[Monark]

I think in 97 (last year for the LT1s) a few Camaros where sent out with LT4s.

[Avaric3]

Originally Posted by Monark I think in 97 (last year for the LT1s) a few Camaros where sent out with LT4s.

yep, thats tru. also in 01 and 02 some of the ls1s came with ls6 intake manifolds on them, which will giuve them about 15rwhp more. you can tell by the casting numbers on the manifold i believe

[The Manalishi]

Originally Posted by Avaric3 yep, thats tru. also in 01 and 02 some of the ls1s came with ls6 intake manifolds on them, which will giuve them about 15rwhp more. you can tell by the casting numbers on the manifold i believe

All 01 and 02 LS1's have the LS6 intake. I can get and post the differences between the years if someone would like to see it.

[ReverendDexter]

yes, please.

[The Manalishi]

The LS1 years. I have to look for the LT1 years.

Differences: 98,99,00,01,02

This is some basic info on the LS1 that i've gather from all of the internet and put into one list:

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 color

2000

1. Redesigned exhaust manifolds for new emissions standard actually flowed better and created a little more HP.
2. 2000 continued use of LS1 Intake, EGR, smaller cam, and 26 lb fuel injectors
3. Added rear child seat safety hooks to interior per federal requirements
4. Very early run of WS6s had "salad shooter" style rims. A production change switched back to standard 5-spoke WS6 rims.
5. Camaros got redesigned 10-spoke base rims, and SSs came with new 10-spoke rim design
6. First year of Monterey Maple Metallic paint
7. Charcoal (grayish) interior was replaced with Ebony (almost black) leather interior
8. Cloth interior cars got new rainbow colored cloth patterns
9. Camaros only got the Pontiac steering wheel with optional audio controls
10. Throttle body cam was increased in size to slow the speed at which the car reaches WOT
11. Automatic transmission cars were reprogrammed to allow a car to start off in 2nd gear from a stop when the shift lever is put into 2.
12. The last year a WS6 Formula was offered
13. Starting 2000 intake lids contained a seperate breather filter
14. 2000+ Camaros came with body colored mirrors instead of black ones like 98-99

2001

1. A small percentage of 2001 and 2002 LS1s actually had LS6 blocks which had a different part number and a darker metal cast
2. Starting 2001, all LS1s came with an LS6 intake manifold without an EGR system
3. Advertised HP output was changed from 305 to 310 on base LS1s and from 320 to 325 on WS6s and SSs
4. 2001-02 cars have a smaller cam from the Vortec truck engines to increase low end torque
5. 2001-02 cars had 28 lb fuel injectors like the 98 cars (albeit different part numbers)
6. WS6 cars had a redesigned 5 spoke rim which was more wavy
7. WS6 cars got less suspension upgrades from a base Trans Am suspension than previous years
8. Manual transmission cars all came with the Z06 clutch

2002 - Last year of the F-body

1. 35th Annivesary edition of the Camaro, and Collectors Edition Trans Am available
2. 2002 LS1 head gaskets redesigned. The new ones are a pressed metal, as opposed to the graphite ones and are no longer specific to the side of the car theyre installed on
3. 2002 cars continued with the LS6 intake, 28 lb fuel inectors and smaller truck cam
4. 2002 continued the use of an LS6 block in some LS1 F-bodies
5. A factory supported optional 345 HP option could be ordered from SLP
6. Manual transmission cars continued use of the Z06 clutch
7. Some 2002 model F-bodies came with a revised rear view mirror that had the map light buttons on the bottom, rather than the front.

compiled by constrictor98ta (mike) from ls2.com and posted by JRP from LS1tech.

[The Manalishi]

BASIC LT1 SPECS



Block and Basics
Displacement: 350 cubic inches, 5733 cubic centimeters, 5.7 liters
Block Material: Cast Iron
Main Bearings: 2-Bolt Centers and Ends (The Corvette LT1/LT4 had 4-bolt mains)
Stroke: 3.48"
Bore: 4.00"
Compression Ratio: 10.4:1
Combustion Chambers: 54 cubic centimeters
Factory Redline Rating: 5700 Rotations Per Minute

Bottom End
Piston Material: (10159437) Eutectic Aluminum/Silicon Alloy
Connecting Rod Material: (10108688) Powdered Metal
Crankshaft Material: (12556307) Cast Iron

Top End and Valvetrain
Cylinder Heads: (10168448) Cast Aluminum, 2 valves per cylinder/16 valves total, ~212 CFM flow (Impala SS and Caprice heads were made of cast iron*)
Valve Diameter: (intake- 10241743, exhaust- 12550909) 1.94 intake, 1.50 exhaust
Valve Overlap: 41*
Valvesprings: (10206040) 85 lbs, seated
Camshaft Specs (12551705): 205/207 duration @ 50*, .447/.459" lift, 117 Lobe Seperation Angle
Rocker Arms: (10089648) 1.5:1 Stamped Steel
Timing Chain: (10128485) Powdered metal butt link

Intake and Fuel Delivery
Fuel Delivery: Electronic Fuel Injection, sequential port
Injector Size: (17124248) 3.0gps, 22lbs/hr speed density (1992-1993), 24lbs/hr mass airflow (1994-1997)
Throttle Body: 48 millimeter twin butterfly
Intake Manifold: (12552137) Aluminum

Factory Power Ratings
92-96 LT1 Corvette: 300bhp, 330lb-ft
1996 LT4 Corvette: 330bhp, 340lb-ft
1992 LT5 Corvette: 375bhp, 370lb-ft
93-95 LT5 Corvette: 405bhp, 385lb-ft
93-95 LT1 F-Body: 275bhp, 325lb-ft
96-97 LT1 F-Body: 285bhp, 325lb-ft
96-97 WS6/SS: 305bhp, 335lb-ft
93-97 Firehawks: 315bhp, 340lb-ft

Factory LTX Camshaft Specifications**:
1992 Y-body: 205/207 0.451/0.450 lift 117 LSA
1993-1995 Y-body, F-body: 202/207 0.450/0.460 lift 116 LSA
1994-1996 B-bodies (including L99 4.3L): 191/196 0.418/0.430 lift 111 LSA
1996 Y-body, 1996-1997 F-body: 200/207 0.447/0.459 lift 117 LSA
1996 Y-body, F-body LT4: 203/210 0.476/0.479 lift 115 LSA


* Cast iron heads are known to flow better, but are also more prone to heat-soak than aluminum heads.
** Thanks to Metalbeast for these specs, posted by Vendetta at LS1Tech.

[GTblackprodigy]

Originally Posted by Avaric3 yep, thats tru. also in 01 and 02 some of the ls1s came with ls6 intake manifolds on them, which will giuve them about 15rwhp more. you can tell by the casting numbers on the manifold i believe

thats why i love my 01 z28

[camarojunky74]

good job, most of this is all true, except the fact that ss came from a company called slp, many of you have heard of them or possibly have their cat back, slp got z28's from gm and put the hood spoiler and wheels on, then if ordered exhaust shocks springs grilles intakes and floor mats, key fobs, birth certificates.

my car is optioned from slp with everything they offered except the bilstein shocks and springs.

there is door stickers on both driver and passenger labeling options and the fact the car has been modified by slp engineering.

if any other info is needed it looks like one of you has a good idea of whats going on,

also 300 02's rolling off the line got the ls6 block, mine was one of them. this was due to they ran out of ls1 blocks.,

also 01-02 doesnt have egr.

[The Manalishi]

Originally Posted by camarojunky74 good job, most of this is all true, except the fact that ss came from a company called slp, many of you have heard of them or possibly have their cat back, slp got z28's from gm and put the hood spoiler and wheels on, then if ordered exhaust shocks springs grilles intakes and floor mats, key fobs, birth certificates. my car is optioned from slp with everything they offered except the bilstein shocks and springs. there is door stickers on both driver and passenger labeling options and the fact the car has been modified by slp engineering. if any other info is needed it looks like one of you has a good idea of whats going on, also 300 02's rolling off the line got the ls6 block, mine was one of them. this was due to they ran out of ls1 blocks., also 01-02 doesnt have egr.

I would hope I have an idea of whats going on with an F-Body. I've owned quite a few of them. My 01 also had an LS6 block, I've never seen a breakdown of how many had them though. Where did you find that info?

[camarojunky74]

id say its impossible for you 01 to have an ls6 block stock, they barely came out with an ls6 late 00, your car was made early 00, but there is possibilities, as far as the breakdown im not sure where i got those numbers.

[04mustang232]

i thought the only diff was suspension and badges, thanks guys

[The Manalishi]

Originally Posted by camarojunky74 id say its impossible for you 01 to have an ls6 block stock, they barely came out with an ls6 late 00, your car was made early 00, but there is possibilities, as far as the breakdown im not sure where i got those numbers.

I'd say you are mistaken. Some cars in 01 and 02 got the LS6 block and it had nothing to do with running out it was the availabilty of what was cast and could be used right then without a delay. My car was produced in 01, March to be exact and came from the factory with the LS6 block. Its also one of 217 with a six speed as a vert in 01. Maybe I should of left it stock since it is apparently one of one in 01 with the LS6 block.

[ReverendDexter]

Yeah, I always thought SSs had like 30-40hp over a Z28. Good to know!