LS2 engine with ls6 intake
Thread Starter
Racer
Joined: Oct 2008
Posts: 374
Likes: 0
LS2 engine with ls6 intake
HI:
I am planning of installing a ls6 intake on ls2 engine. This going to be installed ina c5 vette. I have read that the ls2 intake is not as efficient as the ls6. at this moemnt I can not afford the FAST 92 intake with TB. So i am planning on installing the ls6 intake with a ls2 oem throttle body. Can someone tell me how to get a 90mm Throttle body that would fit this intake? I have been told that the stocks 90mm Tb are 4 bolts and the ls6 intake is only 3 bolts, also there is a problem with the electronics they do not match and most of the 90mm are cable driven. This is going to be installed in a c5 which have a elctronic throttle(not cable driven).
I am planning of installing a ls6 intake on ls2 engine. This going to be installed ina c5 vette. I have read that the ls2 intake is not as efficient as the ls6. at this moemnt I can not afford the FAST 92 intake with TB. So i am planning on installing the ls6 intake with a ls2 oem throttle body. Can someone tell me how to get a 90mm Throttle body that would fit this intake? I have been told that the stocks 90mm Tb are 4 bolts and the ls6 intake is only 3 bolts, also there is a problem with the electronics they do not match and most of the 90mm are cable driven. This is going to be installed in a c5 which have a elctronic throttle(not cable driven).
Advanced
Joined: Oct 2007
Posts: 76
Likes: 1
From: Cartersville Ga
why would you want to put a 90mm tb on a 78mm intake? just use your factory tb. being the intake is going to be smaller than the tb you will have a restriction at the intake and air turbulence. since you are shrinking air from 90mm to 78mm. it would be different if it was a smooth transistion(sp)
Thread Starter
Racer
Joined: Oct 2008
Posts: 374
Likes: 0
Just forgot to mention that I plan to port the snout. Hopefuly i think this can be done or It can nbe done. Any advice? I am trying to avoid spending 900 bucks in a Fast intake. Do you guys think a ported ls2 intake with the 90mm tb would be better than ls6 ported intake with a 90mm tb?
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
TPIS cuts the front of the manifold off and bonds a 90mm snout to it. You CAN NOT port an LS6 opening to fit a 90mm TB, and even if you did, an LS2 TB still won't bolt up. I have a 90mm TPIS intake on my 382 and I love it.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
why would you want to put a 90mm tb on a 78mm intake? just use your factory tb. being the intake is going to be smaller than the tb you will have a restriction at the intake and air turbulence. since you are shrinking air from 90mm to 78mm. it would be different if it was a smooth transistion(sp)
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
As Mike has stated, TPiS will convert your LS6 intake manifold to accept a LS2/LS7 90mm throttle body. I had them do the conversion on my intake. Here are pictures after the conversion and the results. I am very happy with both.
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Race Director
Joined: Sep 2005
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From: Pasco WA
HI:
I am planning of installing a ls6 intake on ls2 engine. This going to be installed ina c5 vette. I have read that the ls2 intake is not as efficient as the ls6. at this moemnt I can not afford the FAST 92 intake with TB. So i am planning on installing the ls6 intake with a ls2 oem throttle body. Can someone tell me how to get a 90mm Throttle body that would fit this intake? I have been told that the stocks 90mm Tb are 4 bolts and the ls6 intake is only 3 bolts, also there is a problem with the electronics they do not match and most of the 90mm are cable driven. This is going to be installed in a c5 which have a elctronic throttle(not cable driven).
I am planning of installing a ls6 intake on ls2 engine. This going to be installed ina c5 vette. I have read that the ls2 intake is not as efficient as the ls6. at this moemnt I can not afford the FAST 92 intake with TB. So i am planning on installing the ls6 intake with a ls2 oem throttle body. Can someone tell me how to get a 90mm Throttle body that would fit this intake? I have been told that the stocks 90mm Tb are 4 bolts and the ls6 intake is only 3 bolts, also there is a problem with the electronics they do not match and most of the 90mm are cable driven. This is going to be installed in a c5 which have a elctronic throttle(not cable driven).
Race Director
Joined: Mar 2004
Posts: 12,466
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From: Fort Wayne IN
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Mike, did you ever do a before/after??? This is what I am wanting to do to my car at some point mainly to make sure that the TB/Inlet to the LS6 manifold isn't a restriction.
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
No, I had Dr. Phil do a street tune on it. He said it needed 10-12% more fuel almost everywhere across the board. My only other power adding mods that I did since my last tune was a Vararam (replaced a Halltech Stinger) a 90MM MAF, and this intake manifold. If it needed that much more fuel then I would say it is also taking in more air. I have a 382 LS6 with some PRC heads and a healthy cam so I'm sure my gains were more than the average bear, but I'm extremely pleased. The butt dyno is definitely reading higher!
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
