HP increase after catback???
#21
10-16-2009, 10:46 AM
hey whats up im not familiar with turbo audis but one thing im familiar with is turbo cars. i had a 1989 Dodge daytona turbo2 intercooled with a stock garrett t03 and all of us turbo dodge guys always when with a 3" straight pipe no cat that whent out the side of the car infront of the rear tire. All the turbo daytonas with that exhaust set up were pretty quiet because the turbo absorbes most of the sound.
and as far as smaller pipe making a turbo spool faster is not true. plus turbo cars dont need back pressure infact the less back pressure you have the better and that doest just apply to the turbo dodge cars it applys to every turbo car.
i dont know how audis work but i dont see why it would be different
and as far as smaller pipe making a turbo spool faster is not true. plus turbo cars dont need back pressure infact the less back pressure you have the better and that doest just apply to the turbo dodge cars it applys to every turbo car.
i dont know how audis work but i dont see why it would be different
The K03 is tiny compared to a T3 in case you haven't noticed, it is even tiny compared to a T28. The inlet to the K03 is the size of a quarter. When you decrease the back pressure of the K03 the WG path ends up having a much lower flow resistance and seeing that the ECU controls the WG more of the exhaust flows thru the WG when the ecu starts to crack it open insteas of going thru the turbo. Now if you use a boost controller (MBC or EBC) you can actually force the WG to stay closed longer and end up not getting that low end tq loss. Believe me people have been testing these things on the A4 well over 10 years.
B5 1.8t K03 vs T28
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