Just wanna share with you guys my experience with ebay test pipe.
The car was reborn. Its just feel better on low rpm and high rpm.
I also have made a test from 100-200 kmh and its 1 second faster afrer removing a cat.
I have also made pull in 4th gear from 1550rpm to 6000+ rpm and calculated MAF values from LOG ( via VCDS) multiply with 1.25 , its ended up with 11HP more and almost 30NM of tourqe.
I've made graphs.
First and second files are made at tuner house on dyno rollers.
Last file is mine ( MAF calculated) dyno.
I didnt made any logs before removing CAT so i don't know how much are these calculations accurate.
But my 100-200 test are prove.
The Random cat - testing - from Rusty was very helpful.
On last graph: blue line is HP, orange line NM.
So conlusion would be: If you want more power remove catalytic converter, and put test pipe.
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![102304]( "102304")
![102305]( "102305")
The car was reborn. Its just feel better on low rpm and high rpm.
I also have made a test from 100-200 kmh and its 1 second faster afrer removing a cat.
I have also made pull in 4th gear from 1550rpm to 6000+ rpm and calculated MAF values from LOG ( via VCDS) multiply with 1.25 , its ended up with 11HP more and almost 30NM of tourqe.
I've made graphs.
First and second files are made at tuner house on dyno rollers.
Last file is mine ( MAF calculated) dyno.
I didnt made any logs before removing CAT so i don't know how much are these calculations accurate.
But my 100-200 test are prove.
The Random cat - testing - from Rusty was very helpful.
On last graph: blue line is HP, orange line NM.
So conlusion would be: If you want more power remove catalytic converter, and put test pipe.
