View Single Post
Old 03-02-2012, 04:04 PM   #97 (permalink)
Olympiadis
oldschool
 
Olympiadis's Avatar
 
Join Date: May 2010
Location: Illinois
Posts: 184

White2003Focus - '03 Ford Focus SE 4-door sedan
Team Ford
90 day: 38.53 mpg (US)

White2001S10pickup - '01 Chevy S10 extended cab LR
Last 3: 24.51 mpg (US)

1989DodgeOMNI - '89 Dodge Omni
Last 3: 30.38 mpg (US)

1991ChevyC1500pickup - '91 Chevy C1500
Last 3: 24.03 mpg (US)

White1986Irocz - '86 Chevy Irocz LB9
Last 3: 30.14 mpg (US)

1999 C5 Corvette - '99 Chevy Corvette

2008 Infinity G37 - '08 Infinity G37
Thanks: 21
Thanked 35 Times in 25 Posts
Quote:
Originally Posted by Old Mechanic View Post
but I guess that would make too much sense.
Yep, and that would be punishable by law that's there to protect us.

I do not tune professionally, or I would be quite unable to post the things that I have. My active contributions have been towards special projects only, and have mostly been limited to performance/track cars.
A track car also has a great interest in running lean at part-throttle to keep the plugs clean and unfouled when the time comes for WOT.

Factory tunes also introduce a level of inconsistency that many racers don't want, and the use of O2 sensors mean that race fuel with certain additives cannot also be used.

That explains the necessity for lean open-loop tunes.

I have used switchable potentiometers many times in order for a user to make temporary adjustments on the fly to either fuel, spark, or both.
It comes in very handy for many things from cold-starts, to using different home-blends of fuel.
  Reply With Quote