Factory mufflers facts

[HaveBlue]

Originally Posted by PieNsky

From the Cadillac forum of last year that was linked to in another thread:

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Thank you all for your patience and we are happy to announce the results are in! Attached are dyno graphs from our 2008 CTS 3.6L DI RWD.
Baseline run: vehicle produced 263.0 rwhp and 241.7 lbs/tq.
Adding the new Corsa Exhaust power jumped to 281.1 rwhp and 255.3 lbs/tq. for an increase of 18.1 rwhp and 13.6 lbs/tq


Their intake gave another 13hp for a total hp gain of 31.


Someone on here has the Corsa exhaust installed and 5hp gain, I think. Makes me wonder what is up with the difference.
As most us already have read, the ECM supposedly will take away any gain. I sent this to a well known CAI in an e-mail to inquire if this is true. Their reply was the initial dyno's gain results were from leaning the AF mixture which was later reset through the drive cycles. That the CAIs were not making much gain and lost the initial lean gain making it appear that the ECM was robbing any mods.
This CAI company that I had e-mailed has not released a CAI yet but are going to release their V8 soon and the V6 will follow.
What would be nice if a V6 CAI comparison could be made like it is being performed for the SS so we would get dyno #s from an independent source.

These claims from D3 have never been backed up independantly, to the best of my knowledge.