ls6 intake on 1999 ls1
Thread Starter
Racer
Joined: May 2009
Posts: 340
Likes: 0
From: Santa Rosa Calif
ls6 intake on 1999 ls1
I would like yo put a ls6 intake on my 1999 ls1. Can anyone tell me what I need to do to make this conversion. Can I use my injectors, rails and throttle body,Also herd I will need plugs, pipes, maps and a tune. I would just like to do it right the first time without any issues. Or maybe if someone knows a site with procedures and parts I need. Thanks
Last edited by robs68; Aug 8, 2012 at 05:22 AM. Reason: left out info
Safety Car
Joined: May 2003
Posts: 4,741
Likes: 35
From: Garfield Heights (AKA:Garbage Hts.) Ohio USA
Cruise-In VII Veteran
St. Jude Donor '07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18
Oldtimer
Here's a link on how to do the swap. Hope it helps you out. 
http://www.ls1howto.com/index.php?article=5
http://www.ls1howto.com/index.php?article=5
Racer
Joined: Aug 2007
Posts: 339
Likes: 0
From: CORONA SO CAL
Plugs and pipe is all you need..........easy swap...................You wont notice much but down the road will will need this intake if you plan on doing any other mods...........clean everything up while its all apart
Race Director
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
Lots of people shave the small ribs off the bottom of the intake and just put it on. I bought a used one already shaved and it works with no other modifications. This works fine for me and I haven't read of a single person having an issue after this was done to an LS6 intake.
If you are going to use 2 of the front coolant pipes then at least bring a hose from the back around to the front and tee it into the line rather than just plugging it with a bolt.
If you are going to use 2 of the front coolant pipes then at least bring a hose from the back around to the front and tee it into the line rather than just plugging it with a bolt.
Last edited by lionelhutz; Aug 8, 2012 at 09:05 AM.
Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
I did the shaved bottom method on mine too. Works as good as it gets and is cheaper. There are no other parts needed if you do it that way, just a gasket kit.
I would also recommend a oil catch can at this time. Once you have it all apart, you will clean out a whole lot of old oil and gunk that's full of grit from over the years. Once you have the intake runners cleaned out and the new intake on (which should be very clean when going on), the intake tract will stay clean from then on without the pcv oil going into the intake anymore.
I am always surprised by the amount of oil the can collects. I am very glad I did it when I did so that that the new set up stays clean and at its peak.
I would also recommend a oil catch can at this time. Once you have it all apart, you will clean out a whole lot of old oil and gunk that's full of grit from over the years. Once you have the intake runners cleaned out and the new intake on (which should be very clean when going on), the intake tract will stay clean from then on without the pcv oil going into the intake anymore.
I am always surprised by the amount of oil the can collects. I am very glad I did it when I did so that that the new set up stays clean and at its peak.
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX
I did the shaved bottom method on mine too. Works as good as it gets and is cheaper. There are no other parts needed if you do it that way, just a gasket kit.
I would also recommend a oil catch can at this time. Once you have it all apart, you will clean out a whole lot of old oil and gunk that's full of grit from over the years. Once you have the intake runners cleaned out and the new intake on (which should be very clean when going on), the intake tract will stay clean from then on without the pcv oil going into the intake anymore.
I am always surprised by the amount of oil the can collects. I am very glad I did it when I did so that that the new set up stays clean and at its peak.
I would also recommend a oil catch can at this time. Once you have it all apart, you will clean out a whole lot of old oil and gunk that's full of grit from over the years. Once you have the intake runners cleaned out and the new intake on (which should be very clean when going on), the intake tract will stay clean from then on without the pcv oil going into the intake anymore.
I am always surprised by the amount of oil the can collects. I am very glad I did it when I did so that that the new set up stays clean and at its peak.
Thanks for input.....
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
Did you put it on, or was it on when you got it? If you did it, you know how easy it is to take on and off. I would just pull it off and thoroughly clean it, the throttle, and the intake runners. All these parts use seals, not gaskets, so if its an LS6 on a 99, I take it the seals are new and reusable. If not a kit is 20 bucks at Autozone. There is plenty of step by steps on the procedure.
Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX
Did you put it on, or was it on when you got it? If you did it, you know how easy it is to take on and off. I would just pull it off and thoroughly clean it, the throttle, and the intake runners. All these parts use seals, not gaskets, so if its an LS6 on a 99, I take it the seals are new and reusable. If not a kit is 20 bucks at Autozone. There is plenty of step by steps on the procedure.
Racer
Joined: Jun 2012
Posts: 459
Likes: 1
From: LAUREL MD
Intake swap
I don't want to hijack this thread but i also am doing the swap. Thanx to the op for starting this thread and all contributors. My question is that i've heard a lot of bad stories about the oil pressure sensors going bad in c5's and the pita it is to change. So, does it make good sense to do a sensor relocate while the intake is off? If so, where can i get a kit. Again, thanx to the op.
Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
Its a 3 or 4 hour job, but if you want to use some kind of cleaner you can. I have no experience with them and cant make any recommendations.
Burning Brakes
Joined: May 2007
Posts: 911
Likes: 27
From: Southern IL
I don't want to hijack this thread but i also am doing the swap. Thanx to the op for starting this thread and all contributors. My question is that i've heard a lot of bad stories about the oil pressure sensors going bad in c5's and the pita it is to change. So, does it make good sense to do a sensor relocate while the intake is off? If so, where can i get a kit. Again, thanx to the op.
Melting Slicks
Joined: Jun 2012
Posts: 3,163
Likes: 6
From: Oceanside California
Melting Slicks
Joined: Aug 2009
Posts: 2,785
Likes: 8
From: Sacramento California
Nobody answered the OP's question about if a tune is needed afterwards. I've been tempted as well to do the swap. But from what I've read, it doesn't make any difference below 5K rpm. And I'm not clear if a tune will be required afterwards. Read this article on intakes. I have never reved my 97' above 5K and can't imagine doing so. Going above 4K scares me. It does not sound good for the motor!
So if that's the case that the LS1 and LS6 are the same below 5K, why do the swap???
http://tpis.com/pages/2_17_06
So if that's the case that the LS1 and LS6 are the same below 5K, why do the swap???
http://tpis.com/pages/2_17_06