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mwebb · 07-31-2011, 11:54 PM

assuming 3000 rpm as approximate upper ceiling of cruise , your exhaust pipe diameter is over 200% too large ,
and it does matter
begin here Autolounge.net | Calculators | Exhaust Pipe Sizing

then
read this thread http://ecomodder.com/forum/showthrea...mpg-12247.html all of it .
***************
the MPGuino will help immensely as well

07-31-2011, 11:54 PM	#8 (permalink)
mwebb Master EcoModder Join Date: Jul 2009 Location: New York Posts: 513 no nickname , it's just a car - '04 volkswagen golf tdi Thanks: 2 Thanked 101 Times in 74 Posts	exhaust pipe diameter is too large assuming 3000 rpm as approximate upper ceiling of cruise , your exhaust pipe diameter is over 200% too large , and it does matter begin here Autolounge.net \| Calculators \| Exhaust Pipe Sizing then read this thread http://ecomodder.com/forum/showthrea...mpg-12247.html all of it . *************** the MPGuino will help immensely as well