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      09-26-2011, 11:02 AM   #1
RaptorKTM
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Akrapovic Full System Question

I just ordered the full system, and am curious to know if pairing this exhaust with the ESS tune will override any codes, however when taking it into the dealer and shutting the tune off, more then likely a tune will arise, other then the obvious reasons, how will this affect bmw performing other services then more then likely they will not want to release a vehicle or wont be able to if it has a check engine light.
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      09-26-2011, 12:06 PM   #2
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Quote:
Originally Posted by RaptorKTM View Post
I just ordered the full system, and am curious to know if pairing this exhaust with the ESS tune will override any codes, however when taking it into the dealer and shutting the tune off, more then likely a tune will arise, other then the obvious reasons, how will this affect bmw performing other services then more then likely they will not want to release a vehicle or wont be able to if it has a check engine light.
This would sound like its a question for ESS. I would suggest calling them and getting your answer directly from the source.

Be sure to follow up so others with the same question can benefit!
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      09-26-2011, 09:39 PM   #3
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If you haven't replaced your stock dowpipes with the Akrapovic Catless downpipes (or anyone elses) then you won't even throw a check engine light.

The 1M has two sets of cats in the stock exhaust system, Akrapovic has confirmed that removal of the secondary set (in the mid pipes) will not trigger a check engine light, only removal of the primary cats in the downpipes will result in a check engine light.

The check engine light will only come on once you replace the stock downpipes with catless downpipes. If you are doing this you will need a tune to get rid of the check engine light.

In regard to your original question, if your car is fitted with catless downpipes and the ESS tune, you will have to flash your car back to stock using the ESS handheld switcher before you go into the dealer for a service (this is so the dealer does not find out you are running an aftermarket tune(ESS)). Once you do this the check engine light will reappear. Once this happens there is no alternative other than to tell your service adviser/mechanic that the car has catless downpipes and that is the reason why the check engine light is illuminated.

The way I look at it is that flashing the car back to stock before a dealership visit, thereby causing the check engine light to illuminate because of the catless downpipes and being upfront and honest about this will not be as bad as leaving the tune enabled so that the check engine light does not come on and the dealer finding out you are running an aftermarket tune as a result.

It really comes down to the lesser of two evils. I hope this answers your question and sheds some light on the situation as I understand it. If anyone else has anything further to add please do, similarly if I am mistaken with anything I said please let me know. Hopefully ESS can chime in and confirm my position.

Thanks
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      09-27-2011, 03:41 AM   #4
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How much HP gain do you feel there will be by doing the downpipe in addition to the rest of the system.
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      09-27-2011, 07:45 AM   #5
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Catless downpipes will net you the most power out of any modification you can do to your car other than a tune. In all honesty the rest of the system is more for show, because the standard 1M system is extremely efficient as it is (except for the downpipes).

But as I mentioned above, there is a trade off if you decide to go with catless downpipes, and that is the need for a tune and the eventual discovery that you are running catless downpipes by your dealer if you don't tell them.
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      09-27-2011, 05:20 PM   #6
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Quote:
Originally Posted by RaptorKTM View Post
I just ordered the full system, and am curious to know if pairing this exhaust with the ESS tune will override any codes, however when taking it into the dealer and shutting the tune off, more then likely a tune will arise, other then the obvious reasons, how will this affect bmw performing other services then more then likely they will not want to release a vehicle or wont be able to if it has a check engine light.
The Akra evolution is from the main cats back and will not throw any codes. The only issue being the flash tune. It may be a good idea to flash it or switch over to the stock map before dealership service work.
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      09-27-2011, 10:31 PM   #7
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Quote:
Originally Posted by RaptorKTM View Post
I just ordered the full system, and am curious to know if pairing this exhaust with the ESS tune will override any codes, however when taking it into the dealer and shutting the tune off, more then likely a tune will arise, other then the obvious reasons, how will this affect bmw performing other services then more then likely they will not want to release a vehicle or wont be able to if it has a check engine light.
It takes about 200 miles for the CEL to come on. It doesn't show up right away.
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      09-28-2011, 11:21 AM   #8
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Well thanks for the good info, I just have to decide now which direction to go
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      09-28-2011, 11:36 AM   #9
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Would you guys do the downpipe based on the information provided?
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      09-28-2011, 11:52 AM   #10
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Question, the catless down pipes will be in violation of the CARB rules, and prevent the car from passing a visual smog test, yes.

WB
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      09-28-2011, 12:49 PM   #11
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Wild Bill are you a Glamis Guy by chance?
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      09-28-2011, 01:19 PM   #12
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Originally Posted by RaptorKTM View Post
Wild Bill are you a Glamis Guy by chance?
"Glamis Guy" ????????????????

WB
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      09-28-2011, 01:29 PM   #13
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Quote:
Originally Posted by Wild Bill View Post
Question, the catless down pipes will be in violation of the CARB rules, and prevent the car from passing a visual smog test, yes.

WB
Bill,

Yes, you are correct. The catless DP is in violation of CARB rules and Federal emissions law. Not only it will not pass a visual, it will not pass a sniffer test either.

Harold
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      09-28-2011, 01:46 PM   #14
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Originally Posted by HP Autowerks View Post
Bill,

Yes, you are correct. The catless DP is in violation of CARB rules and Federal emissions law. Not only it will not pass a visual, it will not pass a sniffer test either.

Harold
Thanks, I thought so, I have been through this with my MINI Coopers, I know the 1M will not be up for smog for 6 years but that doesn't stop the over zealous officer for stopping you for your loud exhaust and sending you right to the referee with your brand new car. You don't want to go to the referee if you have touched anything in the engine compartment. I had a friend get his car rejected at the referee for changing a vacuum line from black to blue. Sounds ridicules, but that is the law here. It doesn't matter if it is functionally the same, it can not deviate from factory stock, and they have photos to go by.

WB
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      09-28-2011, 01:47 PM   #15
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Quote:
Originally Posted by Wild Bill View Post
"Glamis Guy" ????????????????

WB
I just recognized the username from another forum that pertains to off roading, thought you had a sand rail and was on this forum as well. Just curious
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      09-28-2011, 02:05 PM   #16
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Quote:
Originally Posted by Wild Bill View Post
Thanks, I thought so, I have been through this with my MINI Coopers, I know the 1M will not be up for smog for 6 years but that doesn't stop the over zealous officer for stopping you for your loud exhaust and sending you right to the referee with your brand new car. You don't want to go to the referee if you have touched anything in the engine compartment. I had a friend get his car rejected at the referee for changing a vacuum line from black to blue. Sounds ridicules, but that is the law here. It doesn't matter if it is functionally the same, it can not deviate from factory stock, and they have photos to go by.

WB
Bill,

I have seen road side smog police in the Irvine and Santa Ana area as well so one must really be careful.

Harold
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