egt and/or wideband

[eclipsegst3131]

i was wondering if i would have to use both an egt gauge and a wideband or if i would only need a wideband and still be good. any advice would be awesome

 

[wishihadatalon]

A wideband is better to have but I use both when tuning. Monitoring everything is always a good choice so I would say you want both.

 

[daren_p]

If you do a quick search you will find lots of info on this topic. Basically as far as tunning goes the EGT has become pretty useless compared to a wideband O2 sensor. If you have the extra cash and a spot to put it, sure go ahead and get one as its just another gauge to help you keep an eye on things. EGT's aren't the best for tuning as there are to many varables between one car to another, such as probe placement etc. to try and compare EGT readings but it is useful to use it for repeatable readings on your own car, ie if you always run 900 C by the end of 3rd on a WOT pull and one day you hit 950, you know somethings up.

 

[DSMunknown]

Monitoring everything is always a good choice so I would say you want both.

If you have the extra cash and a spot to put it, sure go ahead and get one as its just another gauge to help you keep an eye on things.

The more information you have, the better. Of course, if the information isn't accurate or consistent, then it's meaningless. But basically it would be a good thing to have both.




So to conclude:

i was wondering if i would have to use both an egt gauge and a wideband or if i would only need a wideband and still be good.

Yes you can use both.

 

[nightspeed87]

im sure an egt gauge is more useful than the air fuel ratio gauge ( which I have one myself ) Supposeing your using wideband with that air fuel ratio gauge does that make the a/f ratio gauge more accurate because of the wide band 02?

 

[GVR4592]

You can't connect a wideband to a normal A/F gauge and get an accurate reading. If you are using the wideband output, it's 0-5 volts. The A/F gauges that most peopl are using are for narrowband sensors that output a 0-1 volt signal.

 

[wishihadatalon]

You can't connect a wideband to a normal A/F gauge and get an accurate reading. If you are using the wideband output, it's 0-5 volts. The A/F gauges that most peopl are using are for narrowband sensors that output a 0-1 volt signal.

Hehe we still hooked mine up cause i was sick of it always sitting at green. I don't use it for anything but my girlfriend likes the flashy lights.

 

[Kevin Jewer]

The single largest factor affecting EGT readings is timing. I would rather use a logger to see what my timing is On NA cars or cars that don't pull timing for knock AFR is the largest factor in EGTs, but this in no way applies to us. WBO2 is infinitely more useful on our cars than EGT, in my most humble of opinions.

 

[brute]

The single largest factor affecting EGT readings is timing. I would rather use a logger to see what my timing is On NA cars or cars that don't pull timing for knock AFR is the largest factor in EGTs, but this in no way applies to us.

I never knew this. I always thought if your EGT's were to skyrocket, it was a sign of running lean. So you're saying when the ECU senses a lean condition, it starts pulling timing so your EGT's drop? WTF I think you just blew my mind.

 

[Kevin Jewer]

Retarded timing will raise EGTs. So in effect, running lean still raises EGTs, but not for the right reasons. Also, running excessively rich will raise EGTs due to fuel still burning as it leaves the motor and passes the sensor. Retarded timing raises EGTs the same way. AFR will affect EGT, but to a small degree. The large swings people report are all from ignition timing changes.

 

[wishihadatalon]

Retarded timing will raise EGTs. So in effect, running lean still raises EGTs, but not for the right reasons. Also, running excessively rich will raise EGTs due to fuel still burning as it leaves the motor and passes the sensor. Retarded timing raises EGTs the same way. AFR will affect EGT, but to a small degree. The large swings people report are all from ignition timing changes.

Also this is why it is important to take care of phantom knock and what not. Ecu pulls timing and your motor runs to lean and bad things can happen.

By using my wideband and my egt we have a great over all tune with egt's catching around 1550 degrees at the top of 4th on a super long pull (21 degrees of timing) and my afr right around 11.2:1. This was on pump gas and man is it fun That is where having both came in handy for me.

 

[DSMunknown]

Retarded timing will raise EGTs. So in effect, running lean still raises EGTs, but not for the right reasons. Also, running excessively rich will raise EGTs due to fuel still burning as it leaves the motor and passes the sensor. Retarded timing raises EGTs the same way. AFR will affect EGT, but to a small degree. The large swings people report are all from ignition timing changes.

Very interesting... good to know!