Replacing ls1 intake with a ls6 intake
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Joined: Apr 2005
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From: Draper, UT
Replacing ls1 intake with a ls6 intake
When replacing a ls1 intake with a ls6 intake can the ls6 throttle body be used? If so, what adjustments and or changes, if any, must be done to make the this change work successfully?
Le Mans Master
Joined: Jun 2008
Posts: 5,284
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From: Rockledge FL
beaten to death for years and years.
There is no difference between a LS1 and LS6 throttle body other than the cool sticker. first make sure you dont already have a LS6 intake since after a certain year (01 i think) all vettes got the LS6 intake regardless of the model. then you have to decide on if you want to go the coolant bypass route or to shave off the casting ribs under the intake so that the original coolant lines can be used. ls1howto.com has all you need to know.
There is no difference between a LS1 and LS6 throttle body other than the cool sticker. first make sure you dont already have a LS6 intake since after a certain year (01 i think) all vettes got the LS6 intake regardless of the model. then you have to decide on if you want to go the coolant bypass route or to shave off the casting ribs under the intake so that the original coolant lines can be used. ls1howto.com has all you need to know.
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Joined: Apr 2005
Posts: 51
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From: Draper, UT
The change to the ls6 intake is on a 98 so it does not have the ls6 manifold. The throttle body on the ls6 is larger than what comes with the ls1. I think the ls1 is 74mm or 78mm and the ls6 is 80mm or 84mm. It seems to me there would be a benefit to a larger throttle body.
Melting Slicks
Joined: Jun 2012
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From: Oceanside California
all C5 TB's are the same. Just port yours or send it in to get done professionally to have a great TB-to-intake match up. The MAF upgrade goes from 74mm to 85mm from what I remember. I did it, but not sure if it really makes a difference.
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Joined: Apr 2005
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From: Draper, UT
NukeC5,
Thanks for the clarification on the size of the MAF. From what I have read on the forum, changing the MAF for more performance has not be measurable, unless I missed a thread somewhere. Also, porting the throttle body has not rendered much in way of performance on a stock ls1.
Thanks for the clarification on the size of the MAF. From what I have read on the forum, changing the MAF for more performance has not be measurable, unless I missed a thread somewhere. Also, porting the throttle body has not rendered much in way of performance on a stock ls1.
Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
NukeC5,
Thanks for the clarification on the size of the MAF. From what I have read on the forum, changing the MAF for more performance has not be measurable, unless I missed a thread somewhere. Also, porting the throttle body has not rendered much in way of performance on a stock ls1.
Thanks for the clarification on the size of the MAF. From what I have read on the forum, changing the MAF for more performance has not be measurable, unless I missed a thread somewhere. Also, porting the throttle body has not rendered much in way of performance on a stock ls1.
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Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
Nope, other than sending it lingenfelter or something. I have done my own on all my cars. Its very simple if you get into it. Your just boring out the lips inside and excess material, the sanding smooth with rough to light sand paper. Just stay away from the area where the throttle plate closes to avoid over porting.