LS1 stock cam specs?
Burning Brakes
Joined: Oct 2003
Posts: 1,162
Likes: 0
From: Dubai
Re: LS1 stock cam specs? (indypace78)
The following is from LS1 / LS6 Performance / Written By Chris Endres
2000 LS1 Y-Car 198/209 .500/.500 LSA 115.5 A
2002 LS1 Y-Car 196/207 .467/.479 LSA 116 ( 2001 - 2003 Same Cam )
:steering:
2000 LS1 Y-Car 198/209 .500/.500 LSA 115.5 A
2002 LS1 Y-Car 196/207 .467/.479 LSA 116 ( 2001 - 2003 Same Cam )
:steering:
Melting Slicks
Joined: Jun 2001
Posts: 2,743
Likes: 3
From: Davie Florida
Re: LS1 stock cam specs? (indypace78)
The stock 02 cam specs are 198/208 500/500 lsa 115.5
Mitch. Do you know what it is for the 00 A4 ??
Mitch. Do you know what it is for the 00 A4 ??
97-00 202/210 472/479 117 LSA
01-04 198/208 500/500 115.5
LS6
01 204/211 525/525 116
02-04 204/218 551/547 117.5
Burning Brakes
Joined: Oct 2003
Posts: 1,162
Likes: 0
From: Dubai
Re: LS1 stock cam specs? (MC TORCH RED)
I am sure the cam size changed in '00.
Mitch, no disrespect but did you get the numbers from a book/site etc. The reason I ask is that as you can see from my earlier post I referred to Chris Endres's book. I have taken a lot of tips from this book & would like to asses to accuracy of the info provided. :blueangel:
Mitch, no disrespect but did you get the numbers from a book/site etc. The reason I ask is that as you can see from my earlier post I referred to Chris Endres's book. I have taken a lot of tips from this book & would like to asses to accuracy of the info provided. :blueangel:
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Melting Slicks
Joined: Jun 2001
Posts: 2,743
Likes: 3
From: Davie Florida
Re: LS1 stock cam specs? (MC TORCH RED)
mitch i think gm went 500 lift in 2000 model.... :confused:
I could be wrong but I don't think so, GM changed the cam, intake manifold, and MAF on the 2001s. That is why the 97-00 are rated 345 HP and the 01-04 are rated 350 HP. I did a search in the forum archives and these are the specs that I came up with.
Intermediate
Joined: Mar 1999
Posts: 40
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From: Naples FL
Re: LS1 stock cam specs? (XMELLOX)
My understanding is that the cam specs for LS1 engines are as follows:
1997-2000 C5 LS1:
- Intake / Exhaust Duration @ .050": 202 / 210 Degrees
- Intake / Exhaust Lift: .472" / .479"
- LSA: 117 Degrees
2001-2004 C5 LS1:
- Intake / Exhaust Duration @ .050": 199 / 210 Degrees
- Intake / Exhaust Lift: .467" / .479"
- LSA: 116 Degrees
1998-2002 Camaro / Firebird LS1:
- Intake / Exhaust Duration @ .050": 198 / 208 Degrees
- Intake / Exhaust Lift: .500" / .500"
- LSA: 115.5 Degrees
There has been only one cam change in the C5 LS1 - in 2001 - when a number of other changes were made in the C5 LS1 motor. The other changes include:
- an air inlet in the front of the air cleaner cover
- a larger MAF (from a 74 mm to 85 mm)
- a larger intake (LS-6) manifold
- a switch from stainless steel 4 into 1 headers to cast iron tri-y headers
- the addition of two "pup" cat convertors (four cat convertors in total compared to 2 in the 1997-2000).
My understanding is that no further changes were made to the 2002-2004 C5 LS1 engines.
1997-2000 C5 LS1:
- Intake / Exhaust Duration @ .050": 202 / 210 Degrees
- Intake / Exhaust Lift: .472" / .479"
- LSA: 117 Degrees
2001-2004 C5 LS1:
- Intake / Exhaust Duration @ .050": 199 / 210 Degrees
- Intake / Exhaust Lift: .467" / .479"
- LSA: 116 Degrees
1998-2002 Camaro / Firebird LS1:
- Intake / Exhaust Duration @ .050": 198 / 208 Degrees
- Intake / Exhaust Lift: .500" / .500"
- LSA: 115.5 Degrees
There has been only one cam change in the C5 LS1 - in 2001 - when a number of other changes were made in the C5 LS1 motor. The other changes include:
- an air inlet in the front of the air cleaner cover
- a larger MAF (from a 74 mm to 85 mm)
- a larger intake (LS-6) manifold
- a switch from stainless steel 4 into 1 headers to cast iron tri-y headers
- the addition of two "pup" cat convertors (four cat convertors in total compared to 2 in the 1997-2000).
My understanding is that no further changes were made to the 2002-2004 C5 LS1 engines.
Racer
Joined: Aug 2000
Posts: 296
Likes: 3
From: Enterprise AL
Cruise-In II Veteran
Re: LS1 stock cam specs? (V8_Club)
There was a cam change in 2000, as well as several other minor internal changes including piston top and combustion chanber design. These changes were not well publisized. I believe that V8_club has the right cam numbers in his post.
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Re: LS1 stock cam specs? (vettman10)
I asked this same question earlier today. Mitch@Tigershark shot me the following info:
With regards to Corvettes...
Year, Engine | Valve Lift | Duration | Lobe Separation | Timing
1997-1999 LS1 | .479/.472 | 207/199 | 117 | 113/121
2000 LS1 | .500/.500 | 209/198 | 115.5 | 112/119
2001-2003 LS1 | .479/.467 | 207/196 | 116 | 117/115
2001 LS6 | .525/.525 | 211/204 | 116 | 114/118
2002-2003 LS6 | .551/.555 | 218/204 | 117.5 | 115/120
I believe this is the correct info. It sure explains why those 2000 C5s are so damn fast! :D
Ed
With regards to Corvettes...
Year, Engine | Valve Lift | Duration | Lobe Separation | Timing
1997-1999 LS1 | .479/.472 | 207/199 | 117 | 113/121
2000 LS1 | .500/.500 | 209/198 | 115.5 | 112/119
2001-2003 LS1 | .479/.467 | 207/196 | 116 | 117/115
2001 LS6 | .525/.525 | 211/204 | 116 | 114/118
2002-2003 LS6 | .551/.555 | 218/204 | 117.5 | 115/120
I believe this is the correct info. It sure explains why those 2000 C5s are so damn fast! :D
Ed
Intermediate
Joined: Mar 1999
Posts: 40
Likes: 0
From: Naples FL
Re: LS1 stock cam specs? (V8_Club)
This is not a "flame". As time goes by, well intended but incorrect data creeps into the Corvette the hobby.
That said, I acknowledge that some of the cam data I cited in a prior post could be wrong, but I still believe it to be correct.
My understanding is that 1998-2002 F-Bodies (Camaros and Firebirds) LS1 engines were equipped with a cam with the following specs:
- Intake / Exhaust Duration: 198 / 208 degrees @ .050 Llift
- Intake / Exhaust Lift: .500" / .500"
- LSA: 115.5
Some of you also cite a cam with identical specs as being the cam that was installed in 2000 C5 LS1's.
The F-Body LS1 cam required an an externally visible EGR valve, which all F-Bodies have. 2000 C5's do not have an externally visible EGR valve, which would likely have been required if a cam with specs identical to the F-Body cam had been installed in the 2000 C5 LS1 engines.
Regarding Mitch@ TigerShot's data, multiple sources indicate that the cam duration specs on the 1997-2000 C5 LS1 are 202 degrees intake / 210 degrees exhaust @ .050 lift. Also multiple sources indicate that the cam lift specs for a 2002-2004 LS6 are .551" intake / .547 exhaust.
Perhaps someone should send an inquiry to Corvette Quarterly to clear the air on the C5 LS1 cam specs issue.
[Modified by C5BTW, 6:10 AM 11/6/2003]
That said, I acknowledge that some of the cam data I cited in a prior post could be wrong, but I still believe it to be correct.
My understanding is that 1998-2002 F-Bodies (Camaros and Firebirds) LS1 engines were equipped with a cam with the following specs:
- Intake / Exhaust Duration: 198 / 208 degrees @ .050 Llift
- Intake / Exhaust Lift: .500" / .500"
- LSA: 115.5
Some of you also cite a cam with identical specs as being the cam that was installed in 2000 C5 LS1's.
The F-Body LS1 cam required an an externally visible EGR valve, which all F-Bodies have. 2000 C5's do not have an externally visible EGR valve, which would likely have been required if a cam with specs identical to the F-Body cam had been installed in the 2000 C5 LS1 engines.
Regarding Mitch@ TigerShot's data, multiple sources indicate that the cam duration specs on the 1997-2000 C5 LS1 are 202 degrees intake / 210 degrees exhaust @ .050 lift. Also multiple sources indicate that the cam lift specs for a 2002-2004 LS6 are .551" intake / .547 exhaust.
Perhaps someone should send an inquiry to Corvette Quarterly to clear the air on the C5 LS1 cam specs issue.
[Modified by C5BTW, 6:10 AM 11/6/2003]
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Re: LS1 stock cam specs? (C5XTASY)
I asked this same question earlier today. Mitch@Tigershark shot me the following info:
With regards to Corvettes...
Year, Engine | Valve Lift | Duration | Lobe Separation | Timing
1997-1999 LS1 | .479/.472 | 207/199 | 117 | 113/121
2000 LS1 | .500/.500 | 209/198 | 115.5 | 112/119
2001-2003 LS1 | .479/.467 | 207/196 | 116 | 117/115
2001 LS6 | .525/.525 | 211/204 | 116 | 114/118
2002-2003 LS6 | .551/.555 | 218/204 | 117.5 | 115/120
I believe this is the correct info. It sure explains why those 2000 C5s are so damn fast! :D
Ed
With regards to Corvettes...
Year, Engine | Valve Lift | Duration | Lobe Separation | Timing
1997-1999 LS1 | .479/.472 | 207/199 | 117 | 113/121
2000 LS1 | .500/.500 | 209/198 | 115.5 | 112/119
2001-2003 LS1 | .479/.467 | 207/196 | 116 | 117/115
2001 LS6 | .525/.525 | 211/204 | 116 | 114/118
2002-2003 LS6 | .551/.555 | 218/204 | 117.5 | 115/120
I believe this is the correct info. It sure explains why those 2000 C5s are so damn fast! :D
Ed
Ed
Burning Brakes
Joined: Oct 2003
Posts: 1,162
Likes: 0
From: Dubai
Re: LS1 stock cam specs? (C5XTASY)
Thanks to Chris Endres for this wonderful book. :thumbs: I have learnt a lot from it. If any of you guys haven't read it yet , I recommend you do. Trust me it is reallly a good book for both novices & pros alike. :flag :steering:
