LS6 Intake manifolds
Le Mans Master
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From: Machineguns, because I don’t compromise
Le Mans Master
Joined: Sep 2014
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From: Kelowna BC
From GM site re the LS1 2000 to 2001 change, and what I understood to be the case:
"...the modifications to the camshaft broaden the torque curve yielding a big boost in torque at the low end."
"...the modifications to the camshaft broaden the torque curve yielding a big boost in torque at the low end."
Banned Scam/Spammer
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From: Machineguns, because I don’t compromise
Check out the specs for yourself. Slightly less valve lift and less duration.
Also keep in mind not only did '01 get the LS6 manifold but it got a larger 85mm mass air meter and better exhaust manifolds compared to the older welded clamshells. Like I said, the '01 made more power in Spite of the cam.
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
Also keep in mind not only did '01 get the LS6 manifold but it got a larger 85mm mass air meter and better exhaust manifolds compared to the older welded clamshells. Like I said, the '01 made more power in Spite of the cam.
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
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Instructor
Joined: Nov 2016
Posts: 154
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From: Santa Cruz CA
Check out the specs for yourself. Slightly less valve lift and less duration.
Also keep in mind not only did '01 get the LS6 manifold but it got a larger 85mm mass air meter and better exhaust manifolds compared to the older welded clamshells. Like I said, the '01 made more power in Spite of the cam.
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
Also keep in mind not only did '01 get the LS6 manifold but it got a larger 85mm mass air meter and better exhaust manifolds compared to the older welded clamshells. Like I said, the '01 made more power in Spite of the cam.
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
If you can drive a C5 like an S2000 and high-shift through corners, than you honestly belong on a race-track full time! For pretty much everyone else, the tweaks were a positive thing... Not that it matters that much when you start modding your car and the intake and exhaust are the first to go!
Thread Starter
Melting Slicks
Joined: Mar 2008
Posts: 2,962
Likes: 254
From: Richmond, Ky
I think the only way to say is a before and after dyno which still won't be the same for every car. The general consensus is that the LS6 manifold is a better design. Having one on an LS1 is probably a positive addition to support other mods in the intake and exhaust area. Again the gains one might see could be a very narrow window in an otherwise "stock" engine. I guess I am saying it's a building block. I have a LS6 intake I bought back last year and still have not installed. I also have a set of headers to install. So one day I'll have a dyno to compare with a baseline dyno I have now.
Last edited by f6john; Jan 1, 2017 at 11:05 AM.
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
Usually when you go with a bigger cam you sacrifice some low end. They just marketed it as an improvement. They also went with pre-cats that year. My guess is that this was all done to meet emissions standards.
They made up for it in terms of HP by adding the LS6 intake parts and 241 heads. I would imagine having to install only one kind of intake system was more cost effective.
They made up for it in terms of HP by adding the LS6 intake parts and 241 heads. I would imagine having to install only one kind of intake system was more cost effective.
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
On a stock early LS1 the result would be the same as if you added the early model cam to the later model engine and deleted the pre-cats. My guess would be between 10-15 HP increase over the stated 350Hp. The early models had 345HP. 365FWHp would be a fair estimate IMO.
I am pretty sure the later LS1's came with slightly larger LS6 injectors as well (from 25 to 28.6 LBS).
The more HP you add the more benefit you will get.
I am pretty sure the later LS1's came with slightly larger LS6 injectors as well (from 25 to 28.6 LBS).
The more HP you add the more benefit you will get.
Pro
Joined: Jul 2014
Posts: 524
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From: Allenspark Colorado
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Check out the specs for yourself. Slightly less valve lift and less duration.
Also keep in mind not only did '01 get the LS6 manifold but it got a larger 85mm mass air meter and better exhaust manifolds compared to the older welded clamshells. Like I said, the '01 made more power in Spite of the cam.
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
Also keep in mind not only did '01 get the LS6 manifold but it got a larger 85mm mass air meter and better exhaust manifolds compared to the older welded clamshells. Like I said, the '01 made more power in Spite of the cam.
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
C5 camshafts:
'97-'99 LS1 .479/.472 lift, 207/199 duration, 117 Lobe Separation Angle
'00 LS1 .500/.500 lift, 209/198 duration, 115.5 LSA
'01-04 LS1 .479/.467 lift, 207/196 duration, 116 LSA
'01 LS6 .525/.525 lift, 211/204 duration, 116 LSA
'02-04 LS6 .551/.555 lift, 218/204 duration, 117.5 LSA
2000 camshaft was given more lift and duration to compensate for the inclusion of pre/pup cats on California and north eastern United States sold vettes to comply with emissions requirements. All '00 LS1s got the larger camshafts, but only those sold for delivery in California or north eastern USA, got the hp robbing pre/pup cats installed.