MINI2

tools113 · Jan 8th, 2006, 11:37 PM

Is it nessary to reset computer after installing a performance exhaust to get full bennifit fro the exhaust?

Root Ginger · Jan 8th, 2006, 11:47 PM

Not really. If you reset then you start at standard factory settings and it will learn your new exhaust. However if you don't reset it will still learn your new exhaust but from it's current settings. In other words it makes no difference. In fact if you have other mods it's probably detrimental to the cars performance to reset.

MINI-Morgan · Jan 9th, 2006, 12:53 AM

Does an exhaust have much affect? not really. I'd say just drive it normally and it will learn but dont expect anything too much.

ScienceGuy · Jan 11th, 2006, 06:13 AM

Really, the only thing the ECM remembers is the long-term fuel injector settings, so
I doubt an exhaust will make ANY difference in this setting.

tools113 · Jan 24th, 2006, 01:29 AM

To answer my own question.
Yes, you must reset the computer after installing an after market performance exhaust.
Do so by disconnecting the battery for at least 30 minutes.
Prior to doing this my gas millage went down from 36 MPG to 30 MPG. After resetting the computer it went upto 39 MPG.

Bradley99 · Jan 24th, 2006, 03:23 AM

Quote: Originally Posted by tools113

To answer my own question.
Yes, you must reset the computer after installing an after market performance exhaust.
Do so by disconnecting the battery for at least 30 minutes.
Prior to doing this my gas millage went down from 36 MPG to 30 MPG. After resetting the computer it went upto 39 MPG.

I've never gotten more than 22.5 mpg around town, maybe 36 on the highway. Was this fuel consumption based on pump gallons consumed vs miles traveled or rather by what the mini's trip computer claimed? If the latter then perhaps you've reset the way the mini calculates mileage rather than any change to actual mileage results. Please elucidate?

ScienceGuy · Jan 24th, 2006, 04:17 AM

Quote: Originally Posted by tools113

Prior to doing this my gas millage went down from 36 MPG to 30 MPG.
After resetting the computer it went upto 39 MPG.

How long was the drive where you measured 36 MPG before the change?
How long was the drive where you measured 30 MPG after the change?
How long was the drive where you measured 39 MPG after the reset?
How did you measure the fuel economy? Computer or filling the tank?

These are important numbers if we are to take this as more than anecdotal.

TallAndy · Jan 24th, 2006, 11:58 AM

Don't un-plug your battery just do it from within the car:

http://www.mini2.com/forum/faq.php?f..._obc_functions

tools113 · Jan 24th, 2006, 10:18 PM

All milage is highway milage. The First comparison was based on a trip that was 650 miles. The second based on a 470 mile trip. And are both based on accual miles driven and fuel consummed on the trips.

Jan 8th, 2006, 11:37 PM	#1
tools113 MINI2 Regular Join Date: Nov 2004 Location: Twinsburg, OH Local Time: 05:20 PM Posts: 133 Offline	computer reset? Is it nessary to reset computer after installing a performance exhaust to get full bennifit fro the exhaust?

Jan 8th, 2006, 11:47 PM	#2 (permalink)
Root Ginger Amiga 500 to PS3 20 Years Join Date: Jul 2001 Location: Slough, Berkshire Local Time: 09:20 PM Posts: 4,634 Offline	Not really. If you reset then you start at standard factory settings and it will learn your new exhaust. However if you don't reset it will still learn your new exhaust but from it's current settings. In other words it makes no difference. In fact if you have other mods it's probably detrimental to the cars performance to reset. It was acceptable in the 80's

Jan 9th, 2006, 12:53 AM	#3 (permalink)
MINI-Morgan MINI Obsessed... My Classifieds Join Date: Nov 2003 Location: Southampton, Hants Local Time: 09:20 PM Posts: 4,679 Offline	Does an exhaust have much affect? not really. I'd say just drive it normally and it will learn but dont expect anything too much. One Man, One Project......find out what happens next at MINIProject.co.uk For MINIs in the south it can only be South Coast New MINI Club

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Jan 11th, 2006, 06:13 AM	#4 (permalink)
ScienceGuy Got evidence? Join Date: Jan 2006 Location: Plymouth, MN Local Time: 03:20 PM Posts: 193 Offline	Really, the only thing the ECM remembers is the long-term fuel injector settings, so I doubt an exhaust will make ANY difference in this setting.

Jan 24th, 2006, 01:29 AM	#5 (permalink)
tools113 MINI2 Regular Join Date: Nov 2004 Location: Twinsburg, OH Local Time: 05:20 PM Posts: 133 Offline	To answer my own question. Yes, you must reset the computer after installing an after market performance exhaust. Do so by disconnecting the battery for at least 30 minutes. Prior to doing this my gas millage went down from 36 MPG to 30 MPG. After resetting the computer it went upto 39 MPG.

Jan 24th, 2006, 03:23 AM	#6 (permalink)
Bradley99 MINI2 Newbie Join Date: Mar 2004 Local Time: 05:20 PM Posts: 11 Offline	Quote: Originally Posted by tools113 To answer my own question. Yes, you must reset the computer after installing an after market performance exhaust. Do so by disconnecting the battery for at least 30 minutes. Prior to doing this my gas millage went down from 36 MPG to 30 MPG. After resetting the computer it went upto 39 MPG. I've never gotten more than 22.5 mpg around town, maybe 36 on the highway. Was this fuel consumption based on pump gallons consumed vs miles traveled or rather by what the mini's trip computer claimed? If the latter then perhaps you've reset the way the mini calculates mileage rather than any change to actual mileage results. Please elucidate?

Jan 24th, 2006, 04:17 AM	#7 (permalink)
ScienceGuy Got evidence? Join Date: Jan 2006 Location: Plymouth, MN Local Time: 03:20 PM Posts: 193 Offline	Quote: Originally Posted by tools113 Prior to doing this my gas millage went down from 36 MPG to 30 MPG. After resetting the computer it went upto 39 MPG. How long was the drive where you measured 36 MPG before the change? How long was the drive where you measured 30 MPG after the change? How long was the drive where you measured 39 MPG after the reset? How did you measure the fuel economy? Computer or filling the tank? These are important numbers if we are to take this as more than anecdotal.

Jan 24th, 2006, 11:58 AM	#8 (permalink)
TallAndy Taller Than You! My Classifieds Join Date: Jul 2003 Location: Bolton Local Time: 10:20 PM Posts: 1,183 Offline	Don't un-plug your battery just do it from within the car: http://www.mini2.com/forum/faq.php?f..._obc_functions

Jan 24th, 2006, 10:18 PM	#9 (permalink)
tools113 MINI2 Regular Join Date: Nov 2004 Location: Twinsburg, OH Local Time: 05:20 PM Posts: 133 Offline	All milage is highway milage. The First comparison was based on a trip that was 650 miles. The second based on a 470 mile trip. And are both based on accual miles driven and fuel consummed on the trips.

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