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.

larry dowty · 05-02-2009, 05:38 PM

yes it will only read one at a time

Ed Wright · 05-09-2012, 10:33 PM

It will only read one period.

I have yet to see one run faster in closed loop. Have seen several faster in open loop.
If the car is slow enough you might make it work. I haven't seen one correct fast enough to work all that well with even a ten second car. Usually ends up not consistent. Tried it several times, won't waste my time with it again.

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

05-02-2009, 05:38 PM	#9
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? yes it will only read one at a time __________________ larry dowty 6388 SS

05-09-2012, 10:33 PM	#10
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 389 Times in 168 Posts	Re: Fuel injection? Open or Closed loop? It will only read one period. I have yet to see one run faster in closed loop. Have seen several faster in open loop. If the car is slow enough you might make it work. I haven't seen one correct fast enough to work all that well with even a ten second car. Usually ends up not consistent. Tried it several times, won't waste my time with it again. __________________ Ed Wright 4156 SS/JA