HOME FORUM RULES CONTACT
     
   
   

Go Back   CLASS RACER FORUM > Class Racer Forums > Stock and Super Stock Tech


View Poll Results: Fuel injection? Do you run in open loop or closed loop
Open Loop 77 66.38%
Closed Loop 39 33.62%
Voters: 116. You may not vote on this poll

Reply
 
Thread Tools Display Modes
Old 04-28-2009, 05:47 PM   #1
art leong
VIP Member
 
Join Date: Dec 2001
Location: Richmond Hill, Georgia
Posts: 2,037
Likes: 0
Liked 1 Time in 1 Post
Default Fuel injection? Open or Closed loop?

How do you guys run?
__________________
Art Leong 2095 SS
art leong is offline   Reply With Quote
Old 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
Default Re: Fuel injection? Open or Closed loop?

Open
__________________
BF/S 1985 Grand Am 3.0 V6
Owen S Quirion is offline   Reply With Quote
Old 04-29-2009, 12:07 PM   #3
larry dowty
Member
 
Join Date: Jan 2005
Location: tacoma wa
Posts: 281
Likes: 0
Liked 3 Times in 3 Posts
Default Re: Fuel injection? Open or Closed loop?

closed
__________________
larry dowty 6388 SS
larry dowty is offline   Reply With Quote
Old 04-29-2009, 03:23 PM   #4
Ed Wright
Veteran Member
 
Ed Wright's Avatar
 
Join Date: Mar 2005
Location: Sand Springs, OK
Posts: 8,132
Likes: 896
Liked 389 Times in 168 Posts
Default Re: Fuel injection? Open or Closed loop?

Quote:
Originally Posted by art leong View Post
How do you guys run?
Open.
__________________
Ed Wright 4156 SS/JA
Ed Wright is offline   Reply With Quote
Old 04-30-2009, 03:12 PM   #5
art leong
VIP Member
 
Join Date: Dec 2001
Location: Richmond Hill, Georgia
Posts: 2,037
Likes: 0
Liked 1 Time in 1 Post
Default 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
art leong is offline   Reply With Quote
Old 05-01-2009, 10:36 AM   #6
Chad Rhodes
VIP Member
 
Join Date: Jan 2005
Location: Where the Green Grass Grows, AL
Posts: 2,386
Likes: 0
Liked 3 Times in 3 Posts
Default Re: Fuel injection? Open or Closed loop?

Quote:
Originally Posted by art leong View Post
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
__________________
Chad Rhodes 2113 I/SA
Chad Rhodes is offline   Reply With Quote
Liked
Old 05-01-2009, 12:30 PM   #7
larry dowty
Member
 
Join Date: Jan 2005
Location: tacoma wa
Posts: 281
Likes: 0
Liked 3 Times in 3 Posts
Default 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
larry dowty is offline   Reply With Quote
Liked
Old 05-02-2009, 01:23 PM   #8
art leong
VIP Member
 
Join Date: Dec 2001
Location: Richmond Hill, Georgia
Posts: 2,037
Likes: 0
Liked 1 Time in 1 Post
Default Re: Fuel injection? Open or Closed loop?

Quote:
Originally Posted by larry dowty View Post
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.
__________________
Art Leong 2095 SS
art leong is offline   Reply With Quote
Old 05-02-2009, 05:38 PM   #9
larry dowty
Member
 
Join Date: Jan 2005
Location: tacoma wa
Posts: 281
Likes: 0
Liked 3 Times in 3 Posts
Default Re: Fuel injection? Open or Closed loop?

yes it will only read one at a time
__________________
larry dowty 6388 SS
larry dowty is offline   Reply With Quote
Old 05-09-2012, 10:33 PM   #10
Ed Wright
Veteran Member
 
Ed Wright's Avatar
 
Join Date: Mar 2005
Location: Sand Springs, OK
Posts: 8,132
Likes: 896
Liked 389 Times in 168 Posts
Default 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
Ed Wright is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:38 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © Class Racer.com. All Rights Reserved. Designated trademarks and brands are the property of their respective owners.