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Thread: 98-02 F Body Engine Differences?
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12-03-2010, 07:26 AM #1
98-02 F Body Engine Differences?
I read somewhere there were different cams, intakes exhaust manifold designs through the 1998-2002 Camaro z28/SS models
From what i remember (please correct me if I'm wrong):
1998:
*First year LS1 Introduced
1999:
*Nothing
2000:
*Breather attached to intake Lid
*New Exhaust manifold design with better flow
2001:
*LS6 Intake Manifold
*Less Aggressive Cam
2002:
*Nothing
This leads to my next question:
I have a 2000 Z28 with SLP intake Lid and LM1 Catback..
*Would I gain about 15HP from an LS6 Intake?
*Would I need a tune?
*Can I use my stock LS1 fuel rails, injectors, whatever else?
*Does the EGR hose hook up the same to the LS6 Manifold?
*I would need an LS6 Throttle Body also?
*Is this fairly easy to swap out, or would I need to pay a shop?
Thanks
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12-03-2010, 08:26 AM #2
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2002 Z28 A4 NBM- Sadly now demodded :(
*sigh* Nobody checks the stickies anymore *sigh*
http://www.ls1.com/forums/showthread.php?t=76551
Pick the "Differences between the years" section...
LS6 intake has no provisions for an EGR...
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12-03-2010, 08:34 AM #3
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2002 Z28 A4 NBM- Sadly now demodded :(
- I don't think you'll get 15 hp with just the intake. Rather it allows better upper RPM potential. They only gave 01/02 a 5hp increase.
- A tune never hurts but IIRC isn't necessary for just the intake.
- Yes.
- See above post.
- No.
- Easy enough if you know what you're doing.
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12-03-2010, 10:32 AM #4
Actually I did read the sticky and it was great information, however I was a bit confused on the camshafts it talked about
QUOTE FROM STICKY
{
1998 F-Body
14. 1998-2000 cars had a larger cam than the 01-02 cars
2000 F-Body
2. 2000 continued use of LS1 Intake, EGR, smaller cam, and 26 lb fuel injectors
}
when it says "smaller" is it the same cam that's in the 1998-99 or 01-02?Last edited by mammoth713; 12-03-2010 at 10:40 AM.
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12-03-2010, 11:23 AM #5
I can post the exact specs when I get home if you are really interested, but I'm sure you can find them online.
The differences are very small in the grinds of the cam.
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12-04-2010, 05:48 AM #6
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Navy Blue Metallic- `98 Formula M6 HdTp
Off the top of my head
1998-2000 F-body cam
198/209 .500/.500 119.5 LSA
2001-2004 (all LS1)
196/207 .469/.474 116 LSA
28# injectors were used 1998 2001-2004
26# injectors were used 1999-2000
The cam change was due more to the removal of the EGR system then anything else. As the new Passenger car intake (LS6) would not have any provisions for EGR.Craig
Semi Retired Street Racer
2012 Lava Red Mustang GT Coupe Brembo/3.73's
Build Date 3/17/11, Last Lava Red GT
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NBM `98 Formula M6 HdTp
1 of 1 Build Date 3/12/98
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12-04-2010, 08:15 AM #7
'98 - mid/late 2000 cars had 803/853 casting heads
mid/late 2000-2002 cars had 241 casting heads
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12-04-2010, 11:11 AM #8
Thanks! So, the sticky on the 2000 year is a typo saying "smaller cam"??
Anyway, so my 2000 LS1 theoretically would benefit more from a LS6 intake than the 01-02 did (because they had a slightly smaller cam)?
-If I was to replace my LS1 Intake with a LS6 one, how do I disconnect the EGR stuff?
-Why did GM do this, and still not have any issues with emissions?
-I've read other members getting maybe 10-15BHP, is this true?
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12-04-2010, 11:53 AM #9
Cam specs and differences right here http://www.smokemup.com/tech/ls1.php
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12-04-2010, 11:55 AM #10
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12-04-2010, 12:06 PM #11
First, yes the earlier cars should benefit more from the LS6 intake, they have the better camshaft. You get the best of both.
Why they did it?? Don't know really. But evidently the EGR wasn't a big player and didn't make much difference in emissions. At the same time the smaller camshaft was used, but that doesn't explain how the Z06 corvettes got away with no EGR on the LS6 intakes considering they had an even larger cam than any of the F-bodies did, hmmm Sure makes ya wonder though.
I don't beleive the HP claim unless you are talking about a larger cam, compression, cylinder heads, type of build.
Putting the LS6 intake on a relatively stock car yields very little. I did it and didn't find much of anything.
Running the LS6 cam in my wifes 2000 SS with the LS1 intake, tuned and alot of track time. Installed the LS6 intake later, found I needed to change the WOT AFR just a tad to get it where it was before. (added a pinch)
But at the track I saw really no difference.
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12-04-2010, 12:09 PM #12
yeah i'm a bit confused which one is right, i've found 3 different sources and none of them are the same (close tho):
++++++++++++++++++++++++++++++++++++++different forum STICKY
1998-2000
202/210 .496"/.496" 116 LSA
2001-2002
198/197 .478"/.478" 115 LSA
++++++++++++++++++++++++++++++++++++++diff forum
1998-2000
198.86/209.25 .498"/.497" 119.45LSA
2001-2002
196.37/208.72 .464"/.479" 115.92LSA
++++++++++++++++++++++++++++++++++++++smokemup.com
1998 - 2000 Fbody
202/210 0.496"/0.496" 116 LSA
2001 - 2002 Fbody
197/207 0.467"/0.479" 116 LSALast edited by mammoth713; 12-04-2010 at 12:11 PM.
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12-04-2010, 12:53 PM #13
All I know is that the 98-00 is slightly bigger than the 01-02 ls1.
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12-04-2010, 12:57 PM #14
From GM
2002 LS1:
Camshaft End Play
0.025-0.305 mm
0.001-0.012 in
Camshaft Journal Diameter
54.99-55.04 mm
2.164-2.166 in
Camshaft Bearing Diameter
55.063-55.088 mm
2.1678-2.1688 in
Camshaft Journal-to-Bearing Clearance
0.023-0.098 mm
0.0009-0.0038 in
Camshaft Journal Diameter Out-of-Round
0.025 mm
0.001 in
Camshaft Lobe Lift - Intake
6.96 mm
0.274 in
Camshaft Lobe Lift - Exhaust
7.13 mm
0.281 in
Camshaft Runout - Measured at the Intermediate Journals
0.05 mm
0.002 in
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12-04-2010, 12:58 PM #15
98 LS1
Camshaft End Play
0.025-0.305 mm
0.001-0.012 in
Camshaft Journal Diameter
54.99-55.04 mm
2.164-2.166 in
Camshaft Bearing Diameter
55.063-55.088 mm
2.1678-2.1688 in
Camshaft Journal-to-Bearing Clearance
0.023-0.098 mm
0.0009-0.0038 in
Camshaft Journal Diameter Out-of-Round
0.025 mm
0.001 in
Camshaft Lobe Lift (Intake)
7.43 mm
0.292 in
Camshaft Lobe Lift (Exhaust)
7.43 mm
0.292 in
Camshaft Runout (Measured at the Intermediate Journals)
0.05 mm
0.002 in
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12-04-2010, 06:27 PM #16
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12-04-2010, 07:09 PM #17
2018 Tahoe - Silver - OEM
2008 Z06 - Velocity Yellow - BBE exhuast - Airaid CAI **sold**
2002 Z06 - Electron Blue Metallic - D1 - E85 - 701 rwhp 687 rwtq **sold**
2002 Z28: M6 NBM - cam and boltons - 396rwhp 357 rwtq **sold**
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12-04-2010, 07:19 PM #18
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12-05-2010, 06:42 AM #19
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Navy Blue Metallic- `98 Formula M6 HdTp
Dude that's the Lobe lift
Anyway I can shed some lite on the non EGR equipped LS1's
All `97-`00 Corvettes and all `01-up LS's use a cam with a 116/117 or tighter LSA
The tighter LSA bleeds more exhaust gas into the intake charge during the overlap period and negates the use of an EGR valve for proper emissions.
The `98-00 F-body cam has a 119.5 LSA and is specific for those cars.
The Corvettes of the same Vintage use specific cams aswell (with a tighter LSA).Last edited by 9T8W66; 12-05-2010 at 06:46 AM.
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12-05-2010, 11:26 AM #20
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2002 Z28 A4 NBM- Sadly now demodded :(
.292 lobe lift x 1.7 rocker ratio = .496 lift at the valve...
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