Running an LS2 intake
Thread Starter
Instructor
Joined: Jan 2007
Posts: 131
Likes: 0
From: Indianapolis IN
Running an LS2 intake
I have a 2000 C5. I picked up an LS2 intake, injectors, fuel rail, and TB for next to nothing. What do I need to make this work with my factory harness? Will the LS2 TB work with my current computer/harness? If I recall correctly the LS2 injectors have a diferent plug but can't and adaptor harness be had? I know a lot of guys run adapters and run the LS1 fuel rail but I already have the LS2 fuel rail.
Thanks!
Thanks!
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
OK. I'm not absolutely positive, but I think you have to get a harness adapter for BOTH the TB, and the injector wiring. Not worth the trouble is the general consensus, as the LS2 intake is more restrictive than the '01-up LS1-6 intake. Tuning problems too, for very little gain. Save the TB, and get a TPIS converted LS6 manifold, which uses the stock fuel rail/injectors, or get a FAST, or the new (someday) Weiand.
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
OK. I'm not absolutely positive, but I think you have to get a harness adapter for BOTH the TB, and the injector wiring. Not worth the trouble is the general consensus, as the LS2 intake is more restrictive than the '01-up LS1-6 intake. Tuning problems too, for very little gain. Save the TB, and get a TPIS converted LS6 manifold, which uses the stock fuel rail/injectors, or get a FAST, or the new (someday) Weiand.
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
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Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
You are better off selling it and picking up a LS6 for $~300, the LS6 flows a lot better than the LS2. Go to ls1tech.com and search on it, you will see what I am talking about.
Drifting
Joined: Feb 2006
Posts: 1,585
Likes: 15
From: New Hartford IA
I think the LS2 would be ok ported(and cheap 
). They have way more casting flash around the runners and internally compared to a LS6 intake stock vs. stock. The ls2, ls3/l76, and ls7 have the most to gain from porting. Port the tb and clean up what you can with the runners matching them to the heads and it would work ok. The injectors are larger and will support higher power levels also. I'd use it up to mid 400whp level then look for a fast 90 for the best gains.
). They have way more casting flash around the runners and internally compared to a LS6 intake stock vs. stock. The ls2, ls3/l76, and ls7 have the most to gain from porting. Port the tb and clean up what you can with the runners matching them to the heads and it would work ok. The injectors are larger and will support higher power levels also. I'd use it up to mid 400whp level then look for a fast 90 for the best gains.
Le Mans Master
Joined: Mar 1999
Posts: 6,029
Likes: 85
From: Palm Coast, FL
I think the LS2 would be ok ported(and cheap ). They have way more casting flash around the runners and internally compared to a LS6 intake stock vs. stock. The ls2, ls3/l76, and ls7 have the most to gain from porting. Port the tb and clean up what you can with the runners matching them to the heads and it would work ok. The injectors are larger and will support higher power levels also. I'd use it up to mid 400whp level then look for a fast 90 for the best gains.
). They have way more casting flash around the runners and internally compared to a LS6 intake stock vs. stock. The ls2, ls3/l76, and ls7 have the most to gain from porting. Port the tb and clean up what you can with the runners matching them to the heads and it would work ok. The injectors are larger and will support higher power levels also. I'd use it up to mid 400whp level then look for a fast 90 for the best gains. Fact is I am running a (ported) LS2 Intake and TB and when comparing (overlay-ed dyno graphs) with the FAST intake, my only loss was at high RPM, the bottleneck was air from the MAF.
My VARARAM came yesterday and I ordered the wiring harness for the MAF changeover to the LS2 so I am anxiously waiting to see if I can match the numbers that someone had using the Fast intake and "other" parts.
Drifting
Joined: Nov 2004
Posts: 1,650
Likes: 4
From: Ringgold GA
Fact is I am running a (ported) LS2 Intake and TB and when comparing (overlay-ed dyno graphs) with the FAST intake, my only loss was at high RPM, the bottleneck was air from the MAF.
My VARARAM came yesterday and I ordered the wiring harness for the MAF changeover to the LS2 so I am anxiously waiting to see if I can match the numbers that someone had using the Fast intake and "other" parts.
Le Mans Master
Joined: Mar 1999
Posts: 6,029
Likes: 85
From: Palm Coast, FL
are you thinking of doing the change?
Drifting
Joined: Nov 2004
Posts: 1,650
Likes: 4
From: Ringgold GA
I don't know yet, I think my LS6 maf is 85mm? I'd like to know how big the LS2 is and if it's worthwhile to swap it when I do the LS2 90mm tb and Weiand intake.
Le Mans Master
Joined: Mar 1999
Posts: 6,029
Likes: 85
From: Palm Coast, FL
Casper's also has the TB wiring harness, i think I paid about $50.00 for it
