air/fuel gauge

superwillard · 05-03-2003, 06:54 PM

I was just wondering how close these gauges are or should I just go off of reading my plugs. I don't want to put in a gauge if all it is going to do is look like a stobe light at night.

Thanks for the input

MDM · 05-03-2003, 09:06 PM

while air fuel gauges can give you a basic idea, especially in showing if you are rich enough @ WOT, I think that aknock sensor adn EGT gauge are far more useful as tuning tools, though not nearly as entertaining to watch @ night.

skiwesser · 05-04-2003, 11:02 PM

Can you put a "knock sensor" on a mustang?
I've never heard of this.

MDM · 05-05-2003, 06:17 AM

MSD makes one. It does not wire into the EEC, but has a driver visual readout and audio warning. It is sensitivity adjustable and instructions are included to set it to your engine. The sensor installs in the coolant passgeway on the driver side rear of the block. There is a pipe plug in the hole from the factory. I am running a 6BTM with the Vortech, so if I am getting a higher reading than I am comfortable with due to high outside temps, low quality gas, etc.. I can take out a little more timing under boost. About $125 from Summit, if memory serves.

John at J&S · 09-18-2003, 08:21 AM

oops. double post.

John at J&S · 09-18-2003, 08:25 AM

We make a closed-loop knock controller system, called the J&S SafeGuard.

Using a single knock sensor, the unit retards only the cylinders that are pinging. Our newest units incorporate boost retard, with "when" and "how much" knobs.

Here's a link to an article written by Larry Henderson from a few years ago. The photos in the article are of our earlier "ugly duckling" version.

http://www.mustangworks.com/articles...ckControl.html

crazypete · 09-18-2003, 10:06 AM

Looks like you guys left the A/F meter subject a while back, but here's my 2 cents: They're worthless. I have 1 hooked up to each bosch o2 sensor and they give totally different readings. The readings are as follows: no signal, an occasional "blip", almost full rich and totally full rich. They dont seem to have a smooth continual sweep of readings.

I basically "read the engine" instead, but I'm carbed so it's no as much of a science as an art. Idle is put the screws in till it sputters and back it off 1 turn. Powervalve is 8.5 and primaries=secondaries is basically a guessing game of sniffing the exhaust, watching the temp guage and feeling the loss or gain of power with jet changes: 68's summer, 72's fall, 74's dead of winter.

Hope this helped some.

gtnby2 · 09-18-2003, 11:23 AM

I've got an A/F ratio in my car and it works to the "T". Maybe it's a little different with the carb but I have had good luck useing as part of my tune-up guide. As for theknock sensor, I might have to look into that....
Later,
Brad

ultraflo · 09-19-2003, 06:53 PM

Anderson Ford sells a wideband O2 kit that is very accurate.

Sells for $560... same people that make the PMS make this wideband kit (EFI systems)

www.andersonfordmotorsport.com

crazypete · 09-20-2003, 10:00 AM

So let me ask this: unless something is wrong with some system in the engine, both O2 sensors should give off the same reading, right?

stangGT95 · 09-20-2003, 09:21 PM

I heard that the A/F gauges that use the red/yellow/green lights were hard to read during the day. So I tried a digital one. Basically all it does is read the voltage from the O2 sensors...it is attached to both banks (just flip a toggle). Mine reads .96 at WOT which is on the rich side. When I flip between banks each read close to the same which is what I think they are supposed to do but I could be wrong. Just my two cents, too.

05-03-2003, 06:54 PM	#1
superwillard Registered Member Join Date: Feb 2003 Location: roseville mi. Posts: 26	air/fuel gauge I was just wondering how close these gauges are or should I just go off of reading my plugs. I don't want to put in a gauge if all it is going to do is look like a stobe light at night. Thanks for the input __________________ 86 hatch 5 speed 3.73 gears gt40p heads,gt 40 intake,headers 70 mm tb 195 lph pump off road h-pipe 2.5 exhaust this year rear air bag electric fan 1.7 rockers no sway bar Best et 14.09 last year 60 ft 1.98

05-04-2003, 11:02 PM	#3
skiwesser Registered Member Join Date: Sep 2000 Location: rock hill,S.C. 29730 Posts: 420	Can you put a "knock sensor" on a mustang? I've never heard of this. __________________ 88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ

09-18-2003, 08:21 AM	#5
John at J&S Registered Member Join Date: Sep 2003 Location: GARDEN GROVE, CA Posts: 2	knock sensor oops. double post. __________________ Thinking is hard work

09-18-2003, 08:25 AM	#6
John at J&S Registered Member Join Date: Sep 2003 Location: GARDEN GROVE, CA Posts: 2	knock sensor We make a closed-loop knock controller system, called the J&S SafeGuard. Using a single knock sensor, the unit retards only the cylinders that are pinging. Our newest units incorporate boost retard, with "when" and "how much" knobs. Here's a link to an article written by Larry Henderson from a few years ago. The photos in the article are of our earlier "ugly duckling" version. http://www.mustangworks.com/articles...ckControl.html __________________ Thinking is hard work

09-18-2003, 10:06 AM	#7
crazypete Registered Member Join Date: Sep 2002 Location: Boston Posts: 592	Looks like you guys left the A/F meter subject a while back, but here's my 2 cents: They're worthless. I have 1 hooked up to each bosch o2 sensor and they give totally different readings. The readings are as follows: no signal, an occasional "blip", almost full rich and totally full rich. They dont seem to have a smooth continual sweep of readings. I basically "read the engine" instead, but I'm carbed so it's no as much of a science as an art. Idle is put the screws in till it sputters and back it off 1 turn. Powervalve is 8.5 and primaries=secondaries is basically a guessing game of sniffing the exhaust, watching the temp guage and feeling the loss or gain of power with jet changes: 68's summer, 72's fall, 74's dead of winter. Hope this helped some. __________________ 91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior

05-03-2003, 09:06 PM	#2
MDM Registered Member Join Date: Feb 2000 Location: Flemington, NJ USA Posts: 166	while air fuel gauges can give you a basic idea, especially in showing if you are rich enough @ WOT, I think that aknock sensor adn EGT gauge are far more useful as tuning tools, though not nearly as entertaining to watch @ night.

05-05-2003, 06:17 AM	#4
MDM Registered Member Join Date: Feb 2000 Location: Flemington, NJ USA Posts: 166	MSD makes one. It does not wire into the EEC, but has a driver visual readout and audio warning. It is sensitivity adjustable and instructions are included to set it to your engine. The sensor installs in the coolant passgeway on the driver side rear of the block. There is a pipe plug in the hole from the factory. I am running a 6BTM with the Vortech, so if I am getting a higher reading than I am comfortable with due to high outside temps, low quality gas, etc.. I can take out a little more timing under boost. About $125 from Summit, if memory serves.

09-18-2003, 11:23 AM	#8
gtnby2 Registered Member Join Date: Aug 2001 Location: Woodlawn IL,USA Posts: 62	crazy pete I've got an A/F ratio in my car and it works to the "T". Maybe it's a little different with the carb but I have had good luck useing as part of my tune-up guide. As for theknock sensor, I might have to look into that.... Later, Brad

09-19-2003, 06:53 PM	#9
ultraflo NX dealer-man Join Date: Sep 1998 Location: Peoria, Illinois Posts: 977	Anderson Ford sells a wideband O2 kit that is very accurate. Sells for $560... same people that make the PMS make this wideband kit (EFI systems) www.andersonfordmotorsport.com __________________ RLS Racing! 93 LX 9.20 @ 147mph 03 Mach 1 12.39 @ 116mph

09-20-2003, 10:00 AM	#10
crazypete Registered Member Join Date: Sep 2002 Location: Boston Posts: 592	So let me ask this: unless something is wrong with some system in the engine, both O2 sensors should give off the same reading, right? __________________ 91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior

09-20-2003, 09:21 PM	#11
stangGT95 Registered Member Join Date: Jun 2003 Location: Novinger, Mo Posts: 72	I heard that the A/F gauges that use the red/yellow/green lights were hard to read during the day. So I tried a digital one. Basically all it does is read the voltage from the O2 sensors...it is attached to both banks (just flip a toggle). Mine reads .96 at WOT which is on the rich side. When I flip between banks each read close to the same which is what I think they are supposed to do but I could be wrong. Just my two cents, too. __________________ 95 GT w/ AODE and Transgo Shift kit, trans cooler, SpeedCal, KB 1.5 Flowzilla w/ 6# pulley, MAC chrome CAI, chrome radiator hoses, stock MAF w/ center post removed, 70mm PP TB, electrical boost & FP gauges, digital A/F gauge, 1 5/8" unequal headers, 2 1/2" ProChamber h-pipe, Borla catback exhaust, and 3.55's. Cobra RR hood, Saleen double wing, Xenon body kit, chrome Cobra R wheels 17X8 in front and 17X10.5 in the back.

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