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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 07-30-2009, 09:58 AM   #1
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Question Do I really need a tune or will the Computer re-calibrate?

I'm obviously new at this "performance tuning" business so here it goes:

1) After I install shorty headers and an "X" pipe Cat-back exhaust system along with OTR RAM Air system, will I REALLY need to get a tune in order to take advantage of the performance parts I just installed or will the computer eventually "learn" and make it's own adjustments that would equal a professional tune?

2) If I get a professional tune, will the new configuration get wiped out when the battery is diconnected or do the settings get saved into eprom chips or something, i.e., if I pay good $ for a tune, will it all get wiped out and I have to get the car re-tuned costing me even more $?

3) I think I already know the answer to this one but does getting a performance tune automatically void the warranty on the engine? I'm not worried about the warranty on the exhaust but the engine is a different story.
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Old 07-30-2009, 10:04 AM   #2
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1) You will see the gains with a tune much better than without. Sure, there will be a slight increase with the go-fast parts installed but to truely take advantage of them, a tune is a must! No, the computer will not "learn" like a tune...it will take up some slack based on some folks thoughts...myself though, a tune is a must when adding parts like this!

2) No...diconnecting the battery will not wipe out your tune...it's "burned" in there and there forever unless you rewrite it or stick in a new computer.

3) Debatable...some say no, some say yes. I heard a story about GM asking for the the entire files from a Corvette after a blown engine. They found three "adjustments" in the program and voided the warranty work. The newer cars have "black boxes" so to say so who knows untill someone tries it. I'd say your warranty will be voided...but others can chime in...
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Old 07-30-2009, 10:04 AM   #3
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disconnecting battery will not wipeout tune, your warranty is up to your dealer, but if you put a hole in a piston and gm sees aftermarket intake, exhaust, your powertrain warranty is void even with the factory tune
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Old 07-30-2009, 10:04 AM   #4
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Quote:
Originally Posted by Edrock View Post
I'm obviously new at this "performance tuning" business so here it goes:

1) After I install shorty headers and an "X" pipe Cat-back exhaust system along with OTR RAM Air system, will I REALLY need to get a tune in order to take advantage of the performance parts I just installed or will the computer eventually "learn" and make it's own adjustments that would equal a professional tune?

I would say you can install those parts without a tune (if catted xpipe), but you will not see the same gains as with a professional tune.
2) If I get a professional tune, will the new configuration get wiped out when the battery is diconnected or do the settings get saved into eprom chips or something, i.e., if I pay good $ for a tune, will it all get wiped out and I have to get the car re-tuned costing me even more $?

No, you will not loose the tune when you disconnect the batter, the tune would actually have to be written over for you to loose it.

3) I think I already know the answer to this one but does getting a performance tune automatically void the warranty on the engine? I'm not worried about the warranty on the exhaust but the engine is a different story.

Typically it will void the warrenty if it causes the problem.

Thanks,
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Old 07-30-2009, 10:13 AM   #5
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Well...I'm not much of an aggressive driver, i.e., I don't go to a track or anything. Just daily driving with some fun now and then. With that said, and the fact that these types of mods are considered minimal, and hundreds, if not thousands of owners do these mods to the LSx engines all the time, and you don't hear too often of any issues being blamed on these mods,...is it reasonable to say that the risk of these mods causing issues that would void the warranty would be considerably low? Of course, I guess it might be a moot point since I would not hesitate if the warranty was already expired a few years from now, right?


BTW...Thanks all for answering my questions.
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Old 07-30-2009, 10:21 AM   #6
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Quote:
Originally Posted by streetrace View Post
disconnecting battery will not wipeout tune, your warranty is up to your dealer, but if you put a hole in a piston and gm sees aftermarket intake, exhaust, your powertrain warranty is void even with the factory tune
What? With an intake and exhaust, they are going to void your warranty?

I'll have to disagree with you there. I've had intake and exhausts on my last two 4th Gens. I had the tranny go out on both of them. Did they void my warranty? Nope. Might as well be the same as having piston problems. They will NOT void a warranty just by intake and exhaust.

now, go and put a tune on it and I promise you that if GM finds out you have TUNED the computer, regardless of ANY dealer, GM WILL VOID YOUR WARRANTY. A dealer can say they will fix something under warranty. But if GM pulls records and sees the tune (which is the case in the vette), say bye bye to that 5 year 100k mile warranty.



OP, I would NOT do a tune unless you are ready to pay to play.
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Old 07-30-2009, 10:31 AM   #7
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What? With an intake and exhaust, they are going to void your warranty?

I'll have to disagree with you there. I've had intake and exhausts on my last two 4th Gens. I had the tranny go out on both of them. Did they void my warranty? Nope. Might as well be the same as having piston problems. They will NOT void a warranty just by intake and exhaust.

now, go and put a tune on it and I promise you that if GM finds out you have TUNED the computer, regardless of ANY dealer, GM WILL VOID YOUR WARRANTY. A dealer can say they will fix something under warranty. But if GM pulls records and sees the tune (which is the case in the vette), say bye bye to that 5 year 100k mile warranty.



OP, I would NOT do a tune unless you are ready to pay to play.

Sounds like good advice TAG. I may just drive it with the mods for now and save a tune for when my warranty expires (wonder how long I can last knowing there's more power to be had by a simple tune). It'll give me something else to look forward to. Of course, after getting it done in a couple of years, I'm sure I'll be kicking myself saying... "I could have been enjoying this extra power all this time...dammit!" I guess I'll have to really think about this one. It boils down to a risk/reward decision and I've never been much of a gambling man...

Thanks again!!
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Old 07-30-2009, 11:36 AM   #8
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Quote:
Originally Posted by streetrace View Post
disconnecting battery will not wipeout tune, your warranty is up to your dealer, but if you put a hole in a piston and gm sees aftermarket intake, exhaust, your powertrain warranty is void even with the factory tune
exhaust only voids the exhaust warranty not the powertrain warranty.

powertrain is any pc work or internals.
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Old 07-30-2009, 11:40 AM   #9
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[QUOTE=TAG UR IT;738672]What? With an intake and exhaust, they are going to void your warranty?

I'll have to disagree with you there. I've had intake and exhausts on my last two 4th Gens. I had the tranny go out on both of them. Did they void my warranty? Nope. Might as well be the same as having piston problems. They will NOT void a warranty just by intake and exhaust.

now, go and put a tune on it and I promise you that if GM finds out you have TUNED the computer, regardless of ANY dealer, GM WILL VOID YOUR WARRANTY. A dealer can say they will fix something under warranty. But if GM pulls records and sees the tune (which is the case in the vette), say bye bye to that 5 year 100k mile warranty.









im am holding the gm bulletin in my hand released july 10th.
first thing to inspect is for any aftermarket exhaust or intake, then take a photo of ecm calibration. now this is up to the dealer everbody knows every dealer is different.
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Old 07-30-2009, 11:43 AM   #10
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Quote:
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disconnecting battery will not wipeout tune, your warranty is up to your dealer, but if you put a hole in a piston and gm sees aftermarket intake, exhaust, your powertrain warranty is void even with the factory tune
This is just not true.
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Old 07-30-2009, 11:46 AM   #11
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Quote:
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im am holding the gm bulletin in my hand released july 10th.
first thing to inspect is for any aftermarket exhaust or intake, then take a photo of ecm calibration. now this is up to the dealer everbody knows every dealer is different.

well my dealer at classic chevrolet in Grapevine Texas many know who they are told me bolt on likes Cai and so for does not void the powertrain.
Longtubes ? that external and its the exhaust warranty.

Have you ever heard of someone installing headers and it messing up there car ? No now installing them wrong and messing up threads is different but it wouldnt void the powertrain warranty.


A tune , Cam or forced induction where you have to mess with factory internal parts will void the tune.

if someone voids your powertrain over exhaust they are screwing you otherwise 99% of america's car is voided a week after they get it.
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Old 07-30-2009, 11:47 AM   #12
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Can I ask a dumb question? Is this car not fast enough. I am use to driving a 2500 HD Diesel Crewcab, and this car seems extremely fast, while I would also like a little different note on the exhaust, it would not be to make it faster. Thanks
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Old 07-30-2009, 11:54 AM   #13
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im just trying to let you guys know, my car has long tubes and will get a tune as soon as my intake shows up
i have worked at a gm dealer for almost 10 years and at my dealership we always take care of the customer, but i have many friends at other dealerships that follow what i aready posted.
2 years ago you could warranty anything, but now things have changed
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Old 07-30-2009, 12:53 PM   #14
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Can I ask a dumb question? Is this car not fast enough. I am use to driving a 2500 HD Diesel Crewcab, and this car seems extremely fast, while I would also like a little different note on the exhaust, it would not be to make it faster. Thanks
Well, to answer your question, yes, I guess it is fast enough. My reasoning is this. I am really more concerned with the sound and deep rumble feel than I am with the torque and hp because it already has that and was actually going to do an Axle back change and be done with it. I happened across some introductory deals with a Cat-back system that would have been roughly the same price as AB solutions. Then the same place is offering another great deal on shorty headers too. So instead of spending X amount of $ on AB, I am going to spend X + a little bit more and not only get the sound but more hp and torque as a bonus. Plus, to get the sound I want, I have not found an AB that will deliver what I want. I rather spend just a little more and get more bang for the buck anyway, see? This setup is 1/3 the cost of the more mainstream branded stuff but has a great reputation in the performance world from what I have read. I'm also going with CAI because I have really enjoyed the benefits on my Mustang and it is relatively cheap to boot.

As far as whether I do the tune now or later after warranty expires...I do the mods first and see what performance improvements that brings. If it is enough to satisfy me then I'll wait for the tune. If it is not quite was I was hoping for...I'll prolly roll the dice with a tune and hope for the best. Good luck fellas.
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Old 07-30-2009, 01:02 PM   #15
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Well, to answer your question, yes, I guess it is fast enough. My reasoning is this. I am really more concerned with the sound and deep rumble feel than I am with the torque and hp because it already has that and was actually going to do an Axle back change and be done with it. I happened across some introductory deals with a Cat-back system that would have been roughly the same price as AB solutions. Then the same place is offering another great deal on shorty headers too. So instead of spending X amount of $ on AB, I am going to spend X + a little bit more and not only get the sound but more hp and torque as a bonus. Plus, to get the sound I want, I have not found an AB that will deliver what I want. I rather spend just a little more and get more bang for the buck anyway, see? This setup is 1/3 the cost of the more mainstream branded stuff but has a great reputation in the performance world from what I have read. I'm also going with CAI because I have really enjoyed the benefits on my Mustang and it is relatively cheap to boot.
OK I understand now, cost benefit, Cool. You mentioned the benefits of the CAI, could you share them with me. I too like you love my car and think it is fast, but prefer a different sound, but do not want to do anything to harm the warranty, better to be safe than sorry. I originally ordered the shorty header, CAI, GM Performance Exhaust and Hurst Shifter, but after finding out that it would be late fall this year I deleted these items so that I could get my car, Of course the dealer is telling me that any mods outside of GM will void my warranty, LOL, but if the GM products are acceptable I would not mind getting them, just not sure right now, I appreciate your info, Thanks John
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Old 07-30-2009, 01:29 PM   #16
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OK I understand now, cost benefit, Cool. You mentioned the benefits of the CAI, could you share them with me. I too like you love my car and think it is fast, but prefer a different sound, but do not want to do anything to harm the warranty, better to be safe than sorry. I originally ordered the shorty header, CAI, GM Performance Exhaust and Hurst Shifter, but after finding out that it would be late fall this year I deleted these items so that I could get my car, Of course the dealer is telling me that any mods outside of GM will void my warranty, LOL, but if the GM products are acceptable I would not mind getting them, just not sure right now, I appreciate your info, Thanks John
Wow. Your story sounds almost identical to mine. Originally I ordererd all the GMPP stuff specifically for the warranty reasons but the more I thought about it I decided not to.. Just too dang expensive for something that may not sound or perform much better than what was on there. The hurst was the 1st thing to go when I heard about the constraint, then Cat-back for $1000 and shorty headers for $900+ on top of CAI was going to be just too much. So I decided AB it is then and I get to save money to boot. But so far the AB clips have been lacking to my ear prolly because my ear is used to the drone of dual chambered Flowmasters. Anyway, since headers and Cat-back would only void any exhaust warranties (most likely) and the discounted offerings Doug Thorley Headers has going on their products, I decided to say WTH and go that route. I really like their dyno sound clip (wish they had idle and rev clips too).

As far as the CAI I had on the Mustang, I think it was made by C&L. I upgraded the Mass Airflow Intake (I think I said that right) to a 77mm setup using the original airbox and swapping out the regular filter with a K&N filter. Sure there are much more elaborate systems out there but at the time, this was about all I could afford and it did well. The old "butt" dyno could tell a difference and it enhanced the sound from the engine bay on acceleration too. It was prolly the cheapest boost for the buck I did to the car. The Flowmasters were just for sound only. Could not tell it was really any faster but I always wanted just a little more girth in the sound...a little deeper burble if you will. The biggest gain I actually felt was after installing the 3-pulley underdrive system. I was amazed at the power the pulley system freed up. I won't be doing pulleys on the Camaro though because of the alternator pulley change. If I sat at idle any longer than 15 minutes, the battery would actually discharge because of that pulley. After that mod, the Mustang seemed to go through batteries and not even get half the life out of them. Just became so annoying. Had starter, alternator, etc. all tested and they always passed. I believe the change in pulley size fed a different charge to the battery than it required and kept burning out cells over time one after another. I might be totally wrong about that but I'm sticking with it and won't be doing that again. Well, sorry for the novel and good luck with your mods. My Doug Thorley shorty headers came in the other day and they are so sweet. Now all I need is for their Cat-back system to ship and for Vararam to hurry up and finish perfecting their masterpiece so I'll be set. Cheers.
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Old 07-30-2009, 01:56 PM   #17
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Edrock,

I appreciate all the info.
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