all useless. the only one that might be useful in real time is boost. i would not put any kind of sensor upstream the turbo.

 

Why is everyone suggesting a wideband? A wideband is a waste of time unless you are tuning your car because it fluctuates so much.

I prefer gauges that I can set warnings on so that if things are not reading within safe ranges I can back off.

I run boost, EGT, oil temp and oil pressure.

 

I am going to run boost, oil pressure, and egt temp

 

since your question is to monitor performance then..

Boost, loggable Wideband, EGT, and a laptop with datalogging software. And hey maybe a Gtech to measure 1/4mile / 0-60 perf. Although you can calc HP / TQ from datalogs.

The reason people suggest a wideband is because your closed loop fueling is a key indicater as to how strong your car is going to be running. A wideband does not really fluctuate that much either other than when transitioning from closed loop to open loop or vice versa. When your car is cruising it will operate in closed loop mode and the ECU will try to maintain a 14.7 A/F ratio for maximum fuel efficiency and reduced emissions. When your car is warming up and when it is wide open throttle it runs in open loop mode and reads your fuel targets in your ECU's fuel map. WOT values in open loop should be from around 10:1 - 11.5:1 depending on fuel and boost and tuning style, any richer and you are probably just burning excessive fuel and not making power, any leaner and you are likely risking engine damage. I guess you just have to know what you are looking at.

 

I run Boost, Air fuel ratio gauge, oil pressure, and water temp gauge.

I don't see the point of really running an EGT gauge if you have a wideband. That will tell you how lean or rich your running a lot better than a egt can. and if you have a safe AFR then you won't be running too hot. But I could be wrong.

 

egt, boost, oil pressure

 

I got Oil press, oil temp, boost(defi's) and wideband.
I don't do "race" and like to do a drag very occasionally. Some spirited driving here and there...
And I'm happy with my set up. But then again, I am no hardcore racer, so you might need more info.

 

I am going to assume your post is not intended to be condescending. My question was rhetorical. There are, of course, useful things that can be derived from a wide band. When on a dyno I absolutely pay close attention to where it is reading. However when I am driving, especially driving hard, the last thing I want to pay attention to is something that fluctuates as much as air/fuel. There are other things that can be monitored with warning levels, such as EGT, that can also let you know your engine is risking damage. Air/fuel is better left for tuning.

 

Boost, egt, oil pressure.

 

I have seen cars with high EGT temps in the 1600's and AF's in the high 10's to low 11's. The timing was retarded too much.

 

so what exactly do you look at with the egt, just high temps mean shut the car down?? i am goin to get a wideband because i am goin to be using methwater injection so in that case if my meth stops injecting the wideband should show

 

I like to monitor EGT for 2 reasons.
The first is that my gauges save the peaks that I hit so I can see the maximum I hit during a drive/track session. This lets me know that everything is running within expected ranges.
The second is that I can set a warning level and have it give me an alarm if it is exceeded. Presently I have mine set to 900C. If I get the warning then I know to back off as there might be a problem. This, for example, made me aware of the limitations of the stock fuel pump even on a car with only an exhaust and a tune. After about 5 laps it would start to povide inadequate fuel making my EGT spike.

I am sure I could have detected this with a wide band although it would have not been nearly as obvious. Because air/fuel fluctuates so much between closed loop and open loop you cannot set a warning. I personally can't closely pay attention to both my driving and at the same time monitor something like air/fuel -- I would much rather just have a warning if limits are exceeded.

BTW -- be careful with meth. If you have a clog and it stops spraying a high EGT may not be sufficient warning to prevent engine damage.

 

My 600whp evo runs 2 gauges.

Boost and a wideband.

IMO if you were on the gas and anything else was to go wrong........you wouldn't have the chance to look anyway.............

 

Inlet Manifold Pressure (boost) and a Wideband A/F

 

ooops duplicate post