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-   -   Fuel injection? Open or Closed loop? (https://classracer.com/classforum/showthread.php?t=17375)

art leong 04-28-2009 05:47 PM

Fuel injection? Open or Closed loop?
 
How do you guys run?

Owen S Quirion 04-29-2009 05:58 AM

Re: Fuel injection? Open or Closed loop?
 
Open

larry dowty 04-29-2009 12:07 PM

Re: Fuel injection? Open or Closed loop?
 
closed

Ed Wright 04-29-2009 03:23 PM

Re: Fuel injection? Open or Closed loop?
 
Quote:

Originally Posted by art leong (Post 117782)
How do you guys run?

Open.

art leong 04-30-2009 03:12 PM

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?

Chad Rhodes 05-01-2009 10:36 AM

Re: Fuel injection? Open or Closed loop?
 
Quote:

Originally Posted by art leong (Post 118136)
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

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.

art leong 05-02-2009 01:23 PM

Re: Fuel injection? Open or Closed loop?
 
Quote:

Originally Posted by larry dowty (Post 118285)
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

Re: Fuel injection? Open or Closed loop?
 
yes it will only read one at a time

Ed Wright 05-09-2012 10:33 PM

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.


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