Safe A.f.r

[sicklaser]

try gapping your plugs down to .75 dont give it a hard time with less than a THIRD of a tank get a fuel pressure gauge $500 or $5000 for a motor.

there are heaps of limits that work against you to pull the power back expecially if you have a zf6, try a different tuner with a bit more sucsess with the zf

[01txr]

Yeh I was thinking of regapping plugs.

They are supposed to be platuims.

Car is a manual 5 spd.

Maybe it might be por boost control as well as when it does do it it seems as it is starting to push real hard and then ping and I will get off it.

I think by memory it has only done it when air is cool so maybe its getting more boost and causing it.

Car has std actuator and suppose to be tuned with 10psi.

I will just have to fiddle with car till I find problem.

I have just bought 3 cobolt gauges for tri pod (Pole Position pod)

Boost, oil pressure & AFR.

So don't have any room for fuel pressure and not sitting it on bonnet/cowl and don't like the pillar pods.

Once AFR gauge is hooked up I wouldn't have a need for fuel pressure gauge as if have poor fuel pressure AFR gauge will read lean won't it?

[O2STOCK]

The AFR gauges are a little difficult to read depending on the type purchased. Some just swing from lean-good-rich quite quickly as the mixture changes hard to know just what is happening.

Has anyone had sucess with a AFR gauge ? showing a reading which makes sense ? other than the type fitted to the dyno or tell tale in the exhauset ?

[Fat-Tony]

The afr guages your referring to are a narrow band sensed guage, they will tell you if the car is running in closed loop (the side to side cycling) .

The rich and lean side of the scale when the ecu is operating in open loop will only be accurate if the voltage output from the O2 sensor is comparible to that of the afr guage. To get the ecu to operate in open loop, give the car some stick.

These guages aint a tuning tool so dont use one as such, and are only accurate enough to give you a rough guide.

[FSIX]

11.8 on mine, my dyno sheets can be viewed here.

http://www.fordxr6turbo.com/forum/index.php?showtopic=31786

[JimmyXR6T04]

yeah, mine go from 12.5 to 11.5.. mail order tune from XFT, so it's nice and safe.

And fatz is right about the AFR gauge. You'll find that under normal driving/load it'll swing from lean-rich.. when under WOT it'll go to rich and stay there, indicating green. Or at least, that's what it should do, provided your car isn't ultimate lean. It's not overly accurate, but it's an indication, and something you can keep an eye, especially if you're worried about the afrs going lean for whatever reason.

[Fat-Tony]

ohhh 12.2 here

[01txr]

The gauge is a Autometer Cobolt series part #6175

I have heard how they will go side to side, I have also heard that if wired up differently (I think it was grey wire) it does not go side to side as fast and is more readable.

I didn't want to spend $1500 on a true AFR metering device just want something that's going to say green for good red for danger so to let me know there is a AFR problem.

I have heard that the new sct2 flasher has data logger capabilities, does anyone know if this will show/record AFR readings?

Also there is a dianostic tool on ebay at present for just over $200 does this record AFR readings?

[Fat-Tony]

When an AFR guage is going side to side, its "NEVER" going to be readable. The ecu is cycling the mixtures to achieve the desired stoichiometric ratio when in this closed loop mode. Most of your normal driving should be done in closed loop, unless you drive like a wreckless idiot. So hence the ecu is using the EGO sensor to monitor and adjust mixtures. A narrow band sensor is only really accurate around stoichiometric AFR's so its only a rough guide round the other levels of the mixture spectrum and when cycling side to side it means the ECU is doing its job properly, no need to monitor it and see what the mixture is at that point as it is constantly changing and readjusting itself to reach stoichiometric ratio

[ENVY-T]

f*ck Adam, did you take some serious pills lastnight? All these answers and they all make sense!