Fuel injection? Open or Closed loop?

art leong · 07-17-2012, 06:55 PM

Quote:

Originally Posted by Capri

Intake air temp sensor. For me, its a factory unit screwed into the lower intake. Just noticed alot of others let it flap in the breeze near the entrance to the TB. Just wondered if it helps something in the fuel curve control.

I have mine screwed into the air box near the scoop. Works fine.

Capri · 07-17-2012, 09:22 PM

Art,

What I am wondering is if I plug the hole in the intake, and just leave it out in the open air, if it would change anything. Its not a problem or anything, but just a thing that makes ya go hmmmmmmmmm

Tony

Ed Wright · 07-17-2012, 09:26 PM

I wouldn't bother moving it.

art leong · 07-17-2012, 09:30 PM

Quote:

Originally Posted by Capri

Art,

What I am wondering is if I plug the hole in the intake, and just leave it out in the open air, if it would change anything. Its not a problem or anything, but just a thing that makes ya go hmmmmmmmmm

Tony

Mine is in the open air of the box I built around my throttle bodies. This picture was taken before I finished it The sensor is in the sheet metal.

Marine One · 07-18-2012, 11:23 PM

If you are concerned that the ambient temps are causing the ECM to pull timing, just adjust / eliminate the amount of timing being pulled via the AIT mapping.

Ed Wright · 07-19-2012, 09:44 AM

Quote:

Originally Posted by Marine One

If you are concerned that the ambient temps are causing the ECM to pull timing, just adjust / eliminate the amount of timing being pulled via the AIT mapping.

Don't really know anybody pulling timing with it. Most slightly tweak air/ fuel with it.

NewHemi · 07-21-2012, 04:42 PM

Just thinking, since we have always run closed loop, that could explain our inconsistency run to run when weather changes a little, but doesnt seem like enough to cause the kind of changes we have seen.

Our tune is tight enough, that we could certainly run open loop without worrying about breaking anything.

Hmmmm, next time out, whenever that might be, I think I will try open loop to see.

David
The New Hemi Guy

HTMtrSprt · 07-21-2012, 07:32 PM

NEVER run a race car in closed loop.

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

07-17-2012, 09:22 PM	#2
Capri Member Join Date: Apr 2004 Posts: 171 Likes: 0 Liked 27 Times in 14 Posts	Re: Fuel injection? Open or Closed loop? Art, What I am wondering is if I plug the hole in the intake, and just leave it out in the open air, if it would change anything. Its not a problem or anything, but just a thing that makes ya go hmmmmmmmmm Tony

07-17-2012, 09:26 PM	#3
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Fuel injection? Open or Closed loop? I wouldn't bother moving it. __________________ Ed Wright 4156 SS/JA

07-18-2012, 11:23 PM	#5
Marine One Junior Member Join Date: Mar 2010 Location: Indiana Posts: 69 Likes: 2 Liked 0 Times in 0 Posts	Re: Fuel injection? Open or Closed loop? If you are concerned that the ambient temps are causing the ECM to pull timing, just adjust / eliminate the amount of timing being pulled via the AIT mapping. __________________ Chad Sheets \| STK 319 \| 10.69 \| 1.39

07-21-2012, 04:42 PM	#7
NewHemi Senior Member Join Date: Dec 2009 Location: Ohio Posts: 472 Likes: 0 Liked 1 Time in 1 Post	Re: Fuel injection? Open or Closed loop? Just thinking, since we have always run closed loop, that could explain our inconsistency run to run when weather changes a little, but doesnt seem like enough to cause the kind of changes we have seen. Our tune is tight enough, that we could certainly run open loop without worrying about breaking anything. Hmmmm, next time out, whenever that might be, I think I will try open loop to see. David The New Hemi Guy

07-21-2012, 07:32 PM	#8
HTMtrSprt Junior Member Join Date: Oct 2007 Posts: 8 Likes: 0 Liked 0 Times in 0 Posts	Re: Fuel injection? Open or Closed loop? NEVER run a race car in closed loop.

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