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Old 01-17-2010, 12:46 AM   #1
sixty9fordkiller
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Tuning required for LTs, CAI, exhaust

Ive been searching for the better part of an hour for this and i cant find the answer to what im inquiring about. Im about to install the full kooks 3" exhaust system complete with their LT's, catted midpipes, and cat-back exhaust as well as either the hennessey CAI, LMR, or K&N. I am also going to get the car tuned.

So my first question is:

1) Will my check engine light come on because of the headers? When/If it does, can/will the tune make the necessary adjustment to turn the light back off?

2) And the most important question; does anyone know of a tuner in the Los Angeles Area that I can take my car to (once these mods are in place) that has a good track record and experience with LS3s?

Im well aware that im gonna spend something near the $3600 range for all that i've mentioned above. If im already prepared to spend that much, I wont mind paying a little extra for quality and experiece for the tune. A recommendation of a good tuner (if not the best) in the L.A. area is what i am really looking for. Thanks in advance
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Old 01-17-2010, 01:17 AM   #2
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I would pose this question to JannettyRacing as to what you want to do and what to expect from these mods.
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Old 01-17-2010, 08:43 AM   #3
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Quote:
Originally Posted by sixty9fordkiller View Post
Ive been searching for the better part of an hour for this and i cant find the answer to what im inquiring about. Im about to install the full kooks 3" exhaust system complete with their LT's, catted midpipes, and cat-back exhaust as well as either the hennessey CAI, LMR, or K&N. I am also going to get the car tuned.

So my first question is:

1) Will my check engine light come on because of the headers? When/If it does, can/will the tune make the necessary adjustment to turn the light back off?

2) And the most important question; does anyone know of a tuner in the Los Angeles Area that I can take my car to (once these mods are in place) that has a good track record and experience with LS3s?

Im well aware that im gonna spend something near the $3600 range for all that i've mentioned above. If im already prepared to spend that much, I wont mind paying a little extra for quality and experiece for the tune. A recommendation of a good tuner (if not the best) in the L.A. area is what i am really looking for. Thanks in advance
You probably will get the light with the LT's...And yes a tune will make the
light go away.
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Old 01-17-2010, 11:17 AM   #4
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You really aren't going to get a definate answer. With LT's, it's a maybe and probably on the check engine light. Tuning will help the performance and keep the light off.

To really be sure the light stays off on a stock tune, you'd have to stick with shorties using the stock convertors. Which a lot of folks if CA do. Still get a great sound, just not the big hp gain like LT's.
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Old 01-18-2010, 08:52 AM   #5
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The light will likely come on, but not right away. It will trip a P0420 and P0430 code which is catalyst efficiency codes for both banks. The tune will definitely keep the light off. Us tuners have the ability to make the computer not report a problem.
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Old 01-18-2010, 09:03 AM   #6
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You really aren't going to get a definate answer. With LT's, it's a maybe and probably on the check engine light. Tuning will help the performance and keep the light off.

To really be sure the light stays off on a stock tune, you'd have to stick with shorties using the stock convertors. Which a lot of folks if CA do. Still get a great sound, just not the big hp gain like LT's.
I thought about shorties but those wont help much with the performance. Im definitely going with LT's and kooks' catted midpipes. The car went 12.8s the only time i took it to the track (completely stock) . Im would like for it to hit mid to low 12's with the mods. It would be tough with shorties to hit that and easier with LT's
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Old 01-18-2010, 09:35 AM   #7
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Quote:
Originally Posted by sixty9fordkiller View Post
Ive been searching for the better part of an hour for this and i cant find the answer to what im inquiring about. Im about to install the full kooks 3" exhaust system complete with their LT's, catted midpipes, and cat-back exhaust as well as either the hennessey CAI, LMR, or K&N. I am also going to get the car tuned.

So my first question is:

1) Will my check engine light come on because of the headers? When/If it does, can/will the tune make the necessary adjustment to turn the light back off?

2) And the most important question; does anyone know of a tuner in the Los Angeles Area that I can take my car to (once these mods are in place) that has a good track record and experience with LS3s?

Im well aware that im gonna spend something near the $3600 range for all that i've mentioned above. If im already prepared to spend that much, I wont mind paying a little extra for quality and experiece for the tune. A recommendation of a good tuner (if not the best) in the L.A. area is what i am really looking for. Thanks in advance
Being that you Reside in CA, your going to have to deal with the Smog Police at some point so Keep that in mind.

At Least in CT we have a 5 year Grace period then every 2 years after.

Long Tube Headers will set up to 2 codes per Bank, 0420 0430, 1133 and 1155 if my memory serves me right.

With custom tuning you can turn off the anoying Light but it still will NOT pass an Emissions Test of the Readiness Monitors, so the car will have to be returned to Stock, Meaning Air box, Manifolds and Cats, and computer, then driven around at least 100 miles before returning for Testing.

All of Which is Illegal by CA smog laws.

Off Road Use doen't even Fly in CA anymore, they are Even going after all the Dune buggy manufacturers, Imagine?

I can provide you with A Diablosport, Predator or Trinity with Tuning For your Modifications.

And I can supply you with all Said parts.

Ted.
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Old 01-18-2010, 09:47 AM   #8
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Quote:
Originally Posted by JANNETTYRACING View Post
Being that you Reside in CA, your going to have to deal with the Smog Police at some point so Keep that in mind.

At Least in CT we have a 5 year Grace period then every 2 years after.

Long Tube Headers will set up to 2 codes per Bank, 0420 0430, 1133 and 1155 if my memory serves me right.

With custom tuning you can turn off the anoying Light but it still will NOT pass an Emissions Test of the Readiness Monitors, so the car will have to be returned to Stock, Meaning Air box, Manifolds and Cats, and computer, then driven around at least 100 miles before returning for Testing.

All of Which is Illegal by CA smog laws.

Off Road Use doen't even Fly in CA anymore, they are Even going after all the Dune buggy manufacturers, Imagine?

I can provide you with A Diablosport, Predator or Trinity with Tuning For your Modifications.

And I can supply you with all Said parts.

Ted.
At Least in CT we have a 5 year Grace period then every 2 years after.

We have this in Cali as well. 6 years before bi-annual inspection so in Cali we have no worries othere then a cop Reffing us. Thats more of a worry for me and should be for most in Cali than a smog 5 years from now. A ref ticket can get expensive
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Old 01-18-2010, 10:25 AM   #9
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At Least in CT we have a 5 year Grace period then every 2 years after.

We have this in Cali as well. 6 years before bi-annual inspection so in Cali we have no worries othere then a cop Reffing us. Thats more of a worry for me and should be for most in Cali than a smog 5 years from now. A ref ticket can get expensive
Sorry, I am Not Fully Up on California Emissions Laws.

I only Know From Talking to Customers out there, that they rutinely get pulled over in spot checks.

We don't have that problem YET.

Ted.
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Old 01-18-2010, 12:44 PM   #10
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Quote:
Originally Posted by JANNETTYRACING View Post
Being that you Reside in CA, your going to have to deal with the Smog Police at some point so Keep that in mind.

At Least in CT we have a 5 year Grace period then every 2 years after.

Long Tube Headers will set up to 2 codes per Bank, 0420 0430, 1133 and 1155 if my memory serves me right.

With custom tuning you can turn off the anoying Light but it still will NOT pass an Emissions Test of the Readiness Monitors, so the car will have to be returned to Stock, Meaning Air box, Manifolds and Cats, and computer, then driven around at least 100 miles before returning for Testing.

All of Which is Illegal by CA smog laws.

Off Road Use doen't even Fly in CA anymore, they are Even going after all the Dune buggy manufacturers, Imagine?

I can provide you with A Diablosport, Predator or Trinity with Tuning For your Modifications.

And I can supply you with all Said parts.

Ted.
So once i buy all the parts, i can just call you with the exact information on the parts im installing and you can sell/ship me one of those tuners you mentioned so that i can upload myself through the OBD II port?

If so, thats perfect because you'll save me a trip (and time) to the shop for tuning
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Old 01-18-2010, 01:32 PM   #11
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So once i buy all the parts, i can just call you with the exact information on the parts im installing and you can sell/ship me one of those tuners you mentioned so that i can upload myself through the OBD II port?

If so, thats perfect because you'll save me a trip (and time) to the shop for tuning
That is correct.
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Old 01-18-2010, 01:42 PM   #12
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That is correct.
excellent! that is just what i wanted to hear. thank you very much. im waiting to see what the outcome will be over at the other thread on this forum regarding the performance output differences between the 1 3/4", 1 7/8" and 2" primary headers on a LS3 so that i know which to buy, and then i will definitely be ringing you up for the tune. Thanks in advance!
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Old 01-18-2010, 02:57 PM   #13
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excellent! that is just what i wanted to hear. thank you very much. im waiting to see what the outcome will be over at the other thread on this forum regarding the performance output differences between the 1 3/4", 1 7/8" and 2" primary headers on a LS3 so that i know which to buy, and then i will definitely be ringing you up for the tune. Thanks in advance!
If you wanted to get going on ordering parts now - you can't go wrong with the 1 7/8s LTs on the LS3. If you know what brand of header you want to buy, shoot them an email with your question. They've tested the heck out of various sizes and will steer you in the right direction.

The most common thing I heard researching this - we really like the way 1 7/8s are performing on the LS3. But there is also some differences brand to brand, you may find one with a set up they have tuned in to their liking using 1 3/4....

But the couple I checked with said they really liked the 1 7/8s, so that was good enough for me. I know that they have tested the heck out of it. Makes sense too, the LS3 has some pretty big ports. Large port heads generally like a decent primary pipe size.
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Old 01-18-2010, 03:47 PM   #14
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If you wanted to get going on ordering parts now - you can't go wrong with the 1 7/8s LTs on the LS3. If you know what brand of header you want to buy, shoot them an email with your question. They've tested the heck out of various sizes and will steer you in the right direction.

The most common thing I heard researching this - we really like the way 1 7/8s are performing on the LS3. But there is also some differences brand to brand, you may find one with a set up they have tuned in to their liking using 1 3/4....

But the couple I checked with said they really liked the 1 7/8s, so that was good enough for me. I know that they have tested the heck out of it. Makes sense too, the LS3 has some pretty big ports. Large port heads generally like a decent primary pipe size.



Im getting the kooks complete exhaust system. LTs, catted midpipes, and cat-back. The part#' is either 6511 or 6510 (depending on the header primary diameter that i want)

They're both essentially the same sytem except the 6511 has 1 7/8 primaries and says its "for 550+hp" application and the 6510 has 1 3/4 primaries.

i know the LT's, tune, and CAI wont get me nowhere near 550hp, but i still want the 1 7/8" headers. thats why im a little up in the air. DO YOU have 1 7/8 headers on yours? What brand? Does your car have a similar setup to what im going to put together for mine?
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Old 01-19-2010, 12:02 AM   #15
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count me in on this too! ima get the bbk headers at the meet/dyno and ima install em and a intake and ima need a tune too
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Old 01-25-2010, 10:12 AM   #16
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i am in the process of installing kooks longtubes w/ cats and a Corsa catback with Roto-Fab CAI.

taking the OEM crap off sucks but the Kooks headers slip right in and look amazing on the cars. the Roto-Fab (in IOM) looks great and installs in minutes. i have had time to do the Corsa yet. i didn't go all Kooks because i heard at cruising speeds it's loud enough that your bain ratles. i figure if you're installing this stuff yourself this might be usefull.

i went with the 1 7/8" Kooks because for my setup now it'll run great and my target is 550rwhp someday. i think the 1 3/4" are a little more restrictive, BUT may give you a tad more low end torque.

my next step will be Ted at Jannetty and either hptuner or the Trinity with his custom tuning expertise. Ted has probly done you're exact configuration in the shop and has a tune he could pre-load for ya to start with.

sounds like you're mods are similar to mine, and Ted mentioned 420rwhp to me would be about where i'm gonna wind up until i can afford the SC.
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Old 01-25-2010, 10:35 AM   #17
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Quote:
Originally Posted by JANNETTYRACING View Post
Being that you Reside in CA, your going to have to deal with the Smog Police at some point so Keep that in mind.

At Least in CT we have a 5 year Grace period then every 2 years after.

Long Tube Headers will set up to 2 codes per Bank, 0420 0430, 1133 and 1155 if my memory serves me right.

With custom tuning you can turn off the anoying Light but it still will NOT pass an Emissions Test of the Readiness Monitors, so the car will have to be returned to Stock, Meaning Air box, Manifolds and Cats, and computer, then driven around at least 100 miles before returning for Testing.

All of Which is Illegal by CA smog laws.

Off Road Use doen't even Fly in CA anymore, they are Even going after all the Dune buggy manufacturers, Imagine?

I can provide you with A Diablosport, Predator or Trinity with Tuning For your Modifications.

And I can supply you with all Said parts.

Ted.
Ted, I questioned two of our major tuners here in Houston about tuning the codes out. One gave the same answer as you of turning codes off, but the other said they could tune it without turning the codes off and that it would pass TX inspection. I point blank asked him again to make sure I heard right that the codes were not turned off. I'm sure you're not too familiar w/ TX either, but just wondering if you think this is possible.

He also said that as of last Sept they started checking to see if codes had been turned off before doing the tests.

Sure would be nice, if this worked...
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Old 01-25-2010, 10:51 AM   #18
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Ted, I questioned two of our major tuners here in Houston about tuning the codes out. One gave the same answer as you of turning codes off, but the other said they could tune it without turning the codes off and that it would pass TX inspection. I point blank asked him again to make sure I heard right that the codes were not turned off. I'm sure you're not too familiar w/ TX either, but just wondering if you think this is possible.

He also said that as of last Sept they started checking to see if codes had been turned off before doing the tests.

Sure would be nice, if this worked...
my understanding is that the high flow converters don't heat up as much, thus tripping the codes. rather than shut them off, i've heard tuners can adjust the tune to read the high flow cats parameters instead.

not sure if this is correct and not sure if it even matters.
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Old 01-25-2010, 11:03 AM   #19
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my understanding is that the high flow converters don't heat up as much, thus tripping the codes. rather than shut them off, i've heard tuners can adjust the tune to read the high flow cats parameters instead.

not sure if this is correct and not sure if it even matters.
That sounds like what he was talking about...

Looks like you and I are going down the same path right now with Corsa and LTs.
Will be interesting to see if there is any difference in sound between ARH and Kooks...
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Old 01-25-2010, 12:12 PM   #20
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That sounds like what he was talking about...

Looks like you and I are going down the same path right now with Corsa and LTs.
Will be interesting to see if there is any difference in sound between ARH and Kooks...
+3
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Old 01-25-2010, 12:26 PM   #21
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That sounds like what he was talking about...

Looks like you and I are going down the same path right now with Corsa and LTs.
Will be interesting to see if there is any difference in sound between ARH and Kooks...
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+3
i doubt the sound will be different because of the header, it's the catback and the presence of cats that should determine the exhaust note. i believe a long tube is a long tube from a sound perspective.

you 2 also doing LT's and Corsa? cool. got my Kooks in place loosly yesterday. slid right in and they look so good it gave me chills..

hopefully i'll get to the Corsa soon......not looking like i'll get another day off work for at least a few weeks.
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Old 01-25-2010, 01:11 PM   #22
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i doubt the sound will be different because of the header, it's the catback and the presence of cats that should determine the exhaust note. i believe a long tube is a long tube from a sound perspective.

you 2 also doing LT's and Corsa? cool. got my Kooks in place loosly yesterday. slid right in and they look so good it gave me chills..

hopefully i'll get to the Corsa soon......not looking like i'll get another day off work for at least a few weeks.
Cool.... Tjbusa too! I agree sound should be the same. I think we choose a good combo with the Corsa x-pipe/resonator.

I've had Corsa on since June and 8000 miles... the LTs should make it just right.
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Old 01-25-2010, 05:04 PM   #23
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Whoa, I was in agreement in post 19 to what you were in agreement with on post 18.

Originally Posted by 2010SSRS
my understanding is that the high flow converters don't heat up as much, thus tripping the codes. rather than shut them off, i've heard tuners can adjust the tune to read the high flow cats parameters instead.

not sure if this is correct and not sure if it even matters.


I am in hopes of finding a handheld tuner that can tune to the parameters of high flow cats. Getting a performance tune with a long tube header package, I'm in it with you for that and I also have a 2 1/2 muffler which I think gives a little back pressure to the Camaro's liking.
My system is 100% SLP. I do love Corsa, they had the best sound driving off vid.
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Old 01-26-2010, 07:50 AM   #24
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Whoa, I was in agreement in post 19 to what you were in agreement with on post 18.

Originally Posted by 2010SSRS
my understanding is that the high flow converters don't heat up as much, thus tripping the codes. rather than shut them off, i've heard tuners can adjust the tune to read the high flow cats parameters instead.

not sure if this is correct and not sure if it even matters.


I am in hopes of finding a handheld tuner that can tune to the parameters of high flow cats. Getting a performance tune with a long tube header package, I'm in it with you for that and I also have a 2 1/2 muffler which I think gives a little back pressure to the Camaro's liking.
My system is 100% SLP. I do love Corsa, they had the best sound driving off vid.
OK.. you're out of the club now... LOL...

Seriously I'm glad to get some confirmation on the tune...
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