increased vacuum with increased ig timing

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Post Reply
Ed Wright
Pro
Pro
Posts: 408
Joined: Sat Jan 07, 2006 4:45 pm
Location: Sand Springs, OK
Contact:
Contact Ed Wright

Re: increased vacuum with increased ig timing

Post by Ed Wright »

"Belgian1979", if you ran it WOT "in MAP mode" it would correct for altitude and Barometer changes, if you do it right.
Is this a race car? Or street toy?
http://www.fastchip.com/
SS/JA 4156
Top
Belgian1979
Guru
Guru
Posts: 4576
Joined: Sat Mar 26, 2011 11:34 am
Location: Belgium - Koersel

Re: increased vacuum with increased ig timing

Post by Belgian1979 »

Ed Wright wrote: ↑Thu Dec 28, 2017 6:53 pm "Belgian1979", if you ran it WOT "in MAP mode" it would correct for altitude and Barometer changes, if you do it right.
Is this a race car? Or street toy?
Street.
I have a seperate sensor for baro which the ecu automatically uses for barometer changes (density). But like I tried to explain, there are some slight nuances for which you still have another add on correction curve. However I deem that unnecessary as the majority of difference from altitude stems from air density changes and the rest can be corrected by the EGO.

BTW : setting a 1200 rpm idle made a big difference in smooth running. To correct something that was said : I currently do not run 36° at idle. I run about 26-27°.
Top
Post Reply

Return to “Engine Tech”