98-02 F Body Engine Differences?

[mammoth713]

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

[67CamaroRSSS]

*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...

[67CamaroRSSS]

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

- 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.

[mammoth713]

- 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.

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?

[allbaugh_04]

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.

[9T8W66]

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.

[SSwt00SS]

'98 - mid/late 2000 cars had 803/853 casting heads

mid/late 2000-2002 cars had 241 casting heads

[mammoth713]

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.

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?

[bluehawk2000]

Cam specs and differences right here http://www.smokemup.com/tech/ls1.php

[bluehawk2000]

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?

And I am wanting to say yes because with a slightly bigger cam and adding the same intake would give you a little more power.

[Firebirdjones]

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)?

-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?

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.

[mammoth713]

Cam specs and differences right here http://www.smokemup.com/tech/ls1.php

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 LSA

[bluehawk2000]

All I know is that the 98-00 is slightly bigger than the 01-02 ls1.

[konigandy6]

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

[konigandy6]

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

[mammoth713]

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

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

thanks for the information.. where did you find that?


So, in short my gains from installing an LS6 intake on my car would be 10hp at best (given i have only modded w/ slp lid and slp LM1 catback..)??

[konigandy6]

thanks for the information.. where did you find that?


So, in short my gains from installing an LS6 intake on my car would be 10hp at best (given i have only modded w/ slp lid and slp LM1 catback..)??

From the GM service information database. Dealership service employee perk

[mammoth713]

From the GM service information database. Dealership service employee perk

wait wait wait, i'm so confused. according to GM the lifts for intake/exhaust are only .292"??? all the other sources are saying atleast .496"

am I reading this wrong?

[9T8W66]

wait wait wait, i'm so confused. according to GM the lifts for intake/exhaust are only .292"??? all the other sources are saying atleast .496"

am I reading this wrong?

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).

[67CamaroRSSS]

.292 lobe lift x 1.7 rocker ratio = .496 lift at the valve...