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      10-21-2013, 09:23 PM   #1
Socrates.Tii
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True or False

My friend told me that if i put Berk Technoligy full race exhaust straight pipes with Catless downpipes i will loose Back pressure and loose power on my N54
TRUE or FALSE?
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      10-21-2013, 09:37 PM   #2
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Quote:
Originally Posted by Da _Grk_Tuner
My friend told me that if i put Berk Technoligy full race exhaust straight pipes with Catless downpipes i will loose Back pressure and loose power on my N54
TRUE or FALSE?
False . A turbo car will never suffer from not enough back pressure . The less the better
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      10-21-2013, 09:55 PM   #3
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False. Back pressure is ALWAYS the enemy. When sizing exhaust(usually this discussion applies to header/manifold designs and not so much midpipes/axle back sections) you want piping designed to move the largest volume of air quickly. Smaller piping increases exhaust gas flow velocity but can choke on top end power and large piping has potential to flow more air but does so lazily at low engine speeds. The smaller piping has more back pressure but that is an undesirable side effect and not a cause of the increased exhaust evacuation.

TLDR:
-Going to a free flowing catback/turboback exhaust will improve performance.
-Back pressure is always something to avoid.
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      10-21-2013, 10:21 PM   #4
08BMWfanatic
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Quote:
Originally Posted by Allen@PTF View Post
False. Back pressure is ALWAYS the enemy. When sizing exhaust(usually this discussion applies to header/manifold designs and not so much midpipes/axle back sections) you want piping designed to move the largest volume of air quickly. Smaller piping increases exhaust gas flow velocity but can choke on top end power and large piping has potential to flow more air but does so lazily at low engine speeds. The smaller piping has more back pressure but that is an undesirable side effect and not a cause of the increased exhaust evacuation.

TLDR:
-Going to a free flowing catback/turboback exhaust will improve performance.
-Back pressure is always something to avoid.

BAM, nicely said. You want the exhaust to flow freely because exhaust gases are what drives the turbo. Let it flow!
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