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Re map ECU after new Exhaust and cats?

phillipj

By phillipj
in 997 TT, 997 GT2

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phillipj Member

phillipj

Posted
Posted

Okay Turbo people... I'm new at this so here is a question. I just added a new exhaust with 200 cell cats to my 997 Turbo. Previously the ECU was upgraded with only GT2 plugs and a BMC filter. Should the ECU get a new map for the addition of the exhaust and cats? Neccessary? Not neccessary?

Any input would be appreciated

Thanks!

:renntech:

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Loren Member

Loren

Posted
  • Admin
Posted

Just disconnect the battery to reset the DME and let re-learn the new system.

Of course you realize it is highly unlikely that you will pass a California smog test.

phillipj Member

phillipj

Posted
  • Author
Posted (edited)

Disconnect the Positive and negative terminals? or just the negative?

These 200 cell cats will pass. If they don't they guy I bought them from will buy them back from me.:rolleyes: 100 cell cats will not pass CA smog.

Fabspeed, Tubi and Techart 200 cell cat exhausts will pass. If they wouldn't pass smog they would have to put a warning of "Track use only". Also if they wouldn't pass they would not ship to California. If for some reason I have a problem I'll just put the stock exhaust back on...

Thanks for the info Loren

Edited by phillipj
jhbrennan Member

jhbrennan

Posted
Posted

Disconnect the Positive and negative terminals? or just the negative?

These 200 cell cats will pass. If they don't they guy I bought them from will buy them back from me.:rolleyes: 100 cell cats will not pass CA smog.

Fabspeed, Tubi and Techart 200 cell cat exhausts will pass. If they wouldn't pass smog they would have to put a warning of "Track use only". Also if they wouldn't pass they would not ship to California. If for some reason I have a problem I'll just put the stock exhaust back on...

Thanks for the info Loren

Shouldn't the exhaust also have some sticker or indication that it is "CARB approved"?

phillipj Member

phillipj

Posted
  • Author
Posted

Don't know about that JH. All I know is that when you go to order an aftermarket exhaust for the Turbo the "race" version is stated as for "off road use only". The "race" version either has 100 cell cats or no cats at all.

There are too many of these exhausts out there for them not to pass smog. No one wants to deal with that. I found out though that you do have to reprogram the flash to raise the limits on the 02 sensors. If you don't do this you get a CEL...

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