Fuel injection? Open or Closed loop?

art leong · 04-28-2009, 05:47 PM

How do you guys run?

Owen S Quirion · 04-29-2009, 05:58 AM

Open

larry dowty · 04-29-2009, 12:07 PM

closed

Ed Wright · 04-29-2009, 03:23 PM

Quote:

Originally Posted by art leong

How do you guys run?

Open.

art leong · 04-30-2009, 03:12 PM

It seems pretty even.
I was under the impression that in closed loop if the O2 sensor gets a wacky reading it will throw the car way off.
How do you keep that from happening?

Chad Rhodes · 05-01-2009, 10:36 AM

Quote:

Originally Posted by art leong

It seems pretty even.
I was under the impression that in closed loop if the O2 sensor gets a wacky reading it will throw the car way off.
How do you keep that from happening?

if you have a very close tune, you can just set the correction limits low, and correction factors small

larry dowty · 05-01-2009, 12:30 PM

art i moved the o2 sensor out of the collector up the header to 12 inches from the head made a huge difference in e.t.

art leong · 05-02-2009, 01:23 PM

Quote:

Originally Posted by larry dowty

art i moved the o2 sensor out of the collector up the header to 12 inches from the head made a huge difference in e.t.

I can do that but it will just monitor one cylinder.

Dickens · 08-09-2012, 09:16 PM

That is a very tough question. I believe the most efficient way to run is in selective closed loop. So, it is not open or closed but open when it 'should" be and closed when it is necessary.

Ed Wright · 08-10-2012, 12:43 PM

Quote:

Originally Posted by Dickens

That is a very tough question. I believe the most efficient way to run is in selective closed loop. So, it is not open or closed but open when it 'should" be and closed when it is necessary.

Not a tough question. And, nothing difficult about doing that at all.

View Poll Results: Fuel injection? Do you run in open loop or closed loop
Open Loop	80	65.04%
Closed Loop	43	34.96%
Voters: 123. You may not vote on this poll

04-28-2009, 05:47 PM	#1
art leong VIP Member Join Date: Dec 2001 Location: Richmond Hill, Georgia Posts: 2,003 Likes: 0 Liked 1 Time in 1 Post	Fuel injection? Open or Closed loop? How do you guys run? __________________ Art Leong 2095 SS

04-29-2009, 05:58 AM	#2
Owen S Quirion Junior Member Join Date: May 2005 Location: Captiol District of New York Posts: 71 Likes: 0 Liked 0 Times in 0 Posts	Re: Fuel injection? Open or Closed loop? Open __________________ BF/S 1985 Grand Am 3.0 V6

04-29-2009, 12:07 PM	#3
larry dowty Member Join Date: Jan 2005 Location: chewelah wa Posts: 283 Likes: 0 Liked 11 Times in 4 Posts	Re: Fuel injection? Open or Closed loop? closed __________________ larry dowty 6388 SS

04-30-2009, 03:12 PM	#5
art leong VIP Member Join Date: Dec 2001 Location: Richmond Hill, Georgia Posts: 2,003 Likes: 0 Liked 1 Time in 1 Post	Re: Fuel injection? Open or Closed loop? It seems pretty even. I was under the impression that in closed loop if the O2 sensor gets a wacky reading it will throw the car way off. How do you keep that from happening? __________________ Art Leong 2095 SS

05-01-2009, 12:30 PM	#7
larry dowty Member Join Date: Jan 2005 Location: chewelah wa Posts: 283 Likes: 0 Liked 11 Times in 4 Posts	Re: Fuel injection? Open or Closed loop? art i moved the o2 sensor out of the collector up the header to 12 inches from the head made a huge difference in e.t. __________________ larry dowty 6388 SS

08-09-2012, 09:16 PM	#9
Dickens Member Join Date: Jun 2011 Location: CA/Iowa Posts: 106 Likes: 71 Liked 11 Times in 7 Posts	Re: Fuel injection? Open or Closed loop? That is a very tough question. I believe the most efficient way to run is in selective closed loop. So, it is not open or closed but open when it 'should" be and closed when it is necessary.