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Knock problem after CAI change and new tune

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Mad Hatter

Gotta go Faster
5,239
4,228
Santiago, Chile
I was having a problem with a friends tune. We added a AED tune after a Kooks header was installed and the car improved dramatically. Then the owner added a PMAS CAI and got a updated AED tune. The car has more knock and feels slower then before the PMAS bolt on. Shaun checked the tune and says all is fine that its either false knock or bad fuel.

What I was hoping to understand is that on the first two WOT pulls the knock added no timing but on the third its adding 4 degrees going to 2.67 at redline..... Any idea what we should look for?? Any suggestions?

These three WOT pulls were done right after each other. Do not understand why all three are so different !!!!!!

first WOT pull
upload_2017-12-6_16-39-46.png

Second WOT pull
upload_2017-12-6_16-40-47.png

Third WOT pull with very different results......
upload_2017-12-6_16-41-36.png
 
Last edited:

Mad Hatter

Gotta go Faster
5,239
4,228
Santiago, Chile
Forgot to mention that it was on a 2015 S550 GT. The PMAS CAI is huge....but rather shoddy, crappy hardware etc.
 

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