LS6 intake as supporting intake mod?
Thread Starter
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
LS6 intake as supporting intake mod?
I currently have every part of my intake upgraded with the exception of the manifold (i have the original LS1 style on my 97)
I'm trying to justify the $300 LS6 manifolds normally go for.
My current intake is a vararam with the new K&N style filter, OEM MAF in a plastic housing, Powerduct with silicone air coupler and a Shaner-ported throttle body.
I'd like to get at least 10hp to justify the purchase of the intake....otherwise i'll live with what I have.
I'm trying to justify the $300 LS6 manifolds normally go for.
My current intake is a vararam with the new K&N style filter, OEM MAF in a plastic housing, Powerduct with silicone air coupler and a Shaner-ported throttle body.
I'd like to get at least 10hp to justify the purchase of the intake....otherwise i'll live with what I have.
Burning Brakes
Joined: Jun 2005
Posts: 860
Likes: 0
From: Jacksonville Florida
I picked up 7 rwhp peak on my LS1 with K&N FIPK II and LG longtubes. Some spots on the curve approached 10 rwhp gains but mostly over 4k rpm's. It was really a "future supporting mod" for me as I am collecting parts for a head/cam build and wouldn't want the greater restriction it would be at that point.
A lot depends on your future plans for the car, current mods, and driving styles. If you're an aggressive driver (living in the upper rpm's), have other intake/exhaust work, or plan to further modify the engine internally (heads, cam, or both) then go for it. If not, the $30 to $40 dollar per horsepower ratio is inline with many other modifications so it's not too bad...
A lot depends on your future plans for the car, current mods, and driving styles. If you're an aggressive driver (living in the upper rpm's), have other intake/exhaust work, or plan to further modify the engine internally (heads, cam, or both) then go for it. If not, the $30 to $40 dollar per horsepower ratio is inline with many other modifications so it's not too bad...
Thread Starter
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
my exhaust side is:
SSAC mid-length headers
Performance Curve cats
WCC X pipe
Borla Stingers
Upcoming mods:
1.8 YT roller rockers.
Drivin habits: This is my daily driver. I need to keep it drivable at all times and have no intentions of installing a cam, or aftermarket heads. Perhaps a set of LS6 heads but that's as far as I plan to go.
SSAC mid-length headers
Performance Curve cats
WCC X pipe
Borla Stingers
Upcoming mods:
1.8 YT roller rockers.
Drivin habits: This is my daily driver. I need to keep it drivable at all times and have no intentions of installing a cam, or aftermarket heads. Perhaps a set of LS6 heads but that's as far as I plan to go.
Burning Brakes
Joined: Jun 2005
Posts: 860
Likes: 0
From: Jacksonville Florida
my exhaust side is:
SSAC mid-length headers
Performance Curve cats
WCC X pipe
Borla Stingers
Upcoming mods:
1.8 YT roller rockers.
Drivin habits: This is my daily driver. I need to keep it drivable at all times and have no intentions of installing a cam, or aftermarket heads. Perhaps a set of LS6 heads but that's as far as I plan to go.
SSAC mid-length headers
Performance Curve cats
WCC X pipe
Borla Stingers
Upcoming mods:
1.8 YT roller rockers.
Drivin habits: This is my daily driver. I need to keep it drivable at all times and have no intentions of installing a cam, or aftermarket heads. Perhaps a set of LS6 heads but that's as far as I plan to go.
Intermediate
Joined: Nov 2007
Posts: 27
Likes: 0
From: Saint John Indiana
LS6 manifold
I ran 13.40s at 104 stock with Z06 air lid (1998,a4,3.15s) added LS6 manifold, coolant by pass and Z06 TI cat back and ran 13.2xs at 106 mph. I do feel a difference over 5000 rpm and it hits the rev limiter a lot easier when shifting if your not careful. I felt no difference from cat back but the manifold did help, hits the tires harder during up shifts as well. Vararam is installed and will see if this gets me closer to the 12s when track opens.
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
I currently have every part of my intake upgraded with the exception of the manifold (i have the original LS1 style on my 97)
I'm trying to justify the $300 LS6 manifolds normally go for.
My current intake is a vararam with the new K&N style filter, OEM MAF in a plastic housing, Powerduct with silicone air coupler and a Shaner-ported throttle body.
I'd like to get at least 10hp to justify the purchase of the intake....otherwise i'll live with what I have.
I'm trying to justify the $300 LS6 manifolds normally go for.
My current intake is a vararam with the new K&N style filter, OEM MAF in a plastic housing, Powerduct with silicone air coupler and a Shaner-ported throttle body.
I'd like to get at least 10hp to justify the purchase of the intake....otherwise i'll live with what I have.
http://www.tpis.com/plog/index.php?o...Id=14&blogId=1 ENJOY
Hint: If you have one in mind for $300 I'd purchase it now
Here is the install instructions:
http://www.ls1howto.com/index.php?article=5
Thanks,Matt
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Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
Uhhhhhm! You might want to read the info in the above post
As well read the instructions and the DYNO results for the LS6 manifold on the LS1 How TO! Site
You want to get rid of that LS1 restrictive, choking manifold - by not doing it you are "NOT" utalizing the Ported TB, Plastic MAF ends, VARARAM, and Smooth Coupler
You have all this air coming in with less restriction then it hits the LS1 manifold and starts to choke off - why do you think they started to put LS6 manifolds on the '01 up LS1's - GM finally figured out that the LS1 restrictive nature was not allowing the motor to breathe and the LS6 enables it to breathe
It is an easy swap and you will not regret it at all
Thanks,Matt
As well read the instructions and the DYNO results for the LS6 manifold on the LS1 How TO! Site
You want to get rid of that LS1 restrictive, choking manifold - by not doing it you are "NOT" utalizing the Ported TB, Plastic MAF ends, VARARAM, and Smooth Coupler
You have all this air coming in with less restriction then it hits the LS1 manifold and starts to choke off - why do you think they started to put LS6 manifolds on the '01 up LS1's - GM finally figured out that the LS1 restrictive nature was not allowing the motor to breathe and the LS6 enables it to breathe
It is an easy swap and you will not regret it at all
Thanks,Matt
Thread Starter
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
Tikiman12 - to jump on this thread. If someone were to do the ls6 manifold swop and had the stock ls1 tb. would it be recommended to get an ls6 tb as well?
You will do well to have it Ported and polished
The real restriction is in the LS1 manifold and not the TB.
It's kinda like this, you have an older 350 Chevy motor with the original Cast Iron Manifold with a 4 Barrel Carb on it and you want more performance:
1. Do you put a bigger carb on it ? or 2. Do you buy a Performer RPM Manifold and reap the benefits of better flow to all the cylinders due the qaulity design, which improves HP and TQ ?
and then you can even upgrade the Carb 
You decide!
It's the same here with the LS6 Manifold the TB is good and porting will make it better but a whole new manifold will be the best along with the LS6!
BUY the dang manifold and slap it on already would yeah
It's a very easy swap Thanks,Matt
Last edited by madmatt9471; Feb 11, 2009 at 12:05 AM. Reason: fix two words
