How accurate is a narrowband AF guage?
05-15-05, 07:02 PM
#1
Powered By Trochoids
Thread Starter
Join Date: Oct 2004
Location: Philly | PA
Posts: 1,457
Likes: 0
Received 0 Likes
on
0 Posts
How accurate is a narrowband AF guage?
If i were trying to lean out my car via an safc, and I just wanted it in the general "stoich" area, will my autometer AF guage fit the bill?
05-15-05, 07:55 PM
#4
Lives on the Forum
I don't agree with J-rat...In the middle ranges, or stoich area if you will, the narrow band is just as accurate as the wide as far as I'm concerned. If this were not the case, all new cars would have wide bands on them for the closed-loop operation to save fuel.
A narrow band's bounce will look the same as a wide band's bounce around the stoich point in closed loop...
A narrow band's bounce will look the same as a wide band's bounce around the stoich point in closed loop...
05-15-05, 08:05 PM
#6
Originally Posted by WAYNE88N/A
I don't agree with J-rat...In the middle ranges, or stoich area if you will, the narrow band is just as accurate as the wide as far as I'm concerned. If this were not the case, all new cars would have wide bands on them for the closed-loop operation to save fuel.
A narrow band's bounce will look the same as a wide band's bounce around the stoich point in closed loop...
A narrow band's bounce will look the same as a wide band's bounce around the stoich point in closed loop...
One word..
Dithering..
05-15-05, 08:08 PM
#7
Super Raterhater
iTrader: (6)
Join Date: Dec 2001
Location: NY, MA, MI, OR, TX, and now LA or AZ!
Posts: 10,624
Likes: 0
Received 2 Likes
on
2 Posts
They have an idle test and a load test usually. Under load, you don't want to tune for 'stoich', at idle, tune the bitch until it stalls or starts hunting.
Trending Topics
05-15-05, 08:33 PM
#11
Powered By Trochoids
Thread Starter
Join Date: Oct 2004
Location: Philly | PA
Posts: 1,457
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by SonicRaT
Run a shitload of alcohol and baby it. 
My HC readings where like 100 above the limit at 25mph and 50 above at 15mph
CO % was about double at 25 and 1.5 times more at 15mph.
So my plan will be about 10% less fuel up to 3500 and a gallon of alky-haul and a 1.4 tank of gas.
05-29-05, 06:11 AM
#13
Rotary Enthusiast
Join Date: May 2004
Location: OC
Posts: 1,088
Likes: 0
Received 0 Likes
on
0 Posts
narrow band is simply not going to do it if youre tuning for any power. word on the street is that the stock o2 sensor pretty much just tells whether your rich or lean.. just a lack of accuracy. for a low rpm test though im sure you could probably get some correction #s from a forum member if anyone could volunteer an approximate amount that he can cut. being a turbo car though.. its tricky. my na .. ive run it -25% and it never detonated.
05-29-05, 07:16 AM
#14
Rotary Enthusiast
Join Date: May 2002
Location: Boston
Posts: 1,203
Likes: 0
Received 0 Likes
on
0 Posts
Yeah but make sure your running an upgraded fuel pump because you would be going dangerously low if you adjusted with a syock fuel pump.
I did this to pass my emissions test way back, i lowered the 1k to like -15% all the way through till 3k. Of course i had a walboro so i was flowing a little more fuel than normal.
It worked though i passed perfectly once i got rid of some of that fuel.
I did this to pass my emissions test way back, i lowered the 1k to like -15% all the way through till 3k. Of course i had a walboro so i was flowing a little more fuel than normal.
It worked though i passed perfectly once i got rid of some of that fuel.
Thread
Thread Starter
Forum
Replies
Last Post
Turblown
Vendor Classifieds
12
10-17-20 03:25 PM
pfsantos
2nd Generation Specific (1986-1992)
1
09-30-15 01:29 PM
