would it be ok to weld the bung for the EGT in some test pipes, instead of higher up on the headers? would the readings be less accurate, it wouldnt be much further away, maybe 6 inches.

 

Bad idea. The egt probe needs to be ~1-2 inches from the head. If it's not the readings are basically useless. In all reality you want the temp in the head, so closer to the head is better.

 

so i guess im not gonna use an EGT gauge, whats another choice

 

I agree. You are better of not putting one on, then putting it in test pipes.

 

Wideband O2

 

Yeah a wideband o2 would be good. Why don't you want to put the probe in the headers? It can be plugged easily if you ever remove it.

 

EGT is pretty much a waste of a gauge spot.

EGTs are effected by ignition timing, and air/fuel ratios.

Without something giving you a base idea, the EGTs are useless to know. Is it too hot because you have a lean air/fuel ratio??? Or maybe its too hot because your timing is too retarded???

Its a waste. Get a wideband O2 guage. I would recommend the AEM or the HKS... the HKS is very expensive but very nice, its like $1050 or so by the time you buy it and the sensor... I think the AEM is around $550 I believe.

This way you have a for sure reading of something. EGT is just too broad and not really good for anything.

If your air/fuel readings are perfect, and your ignition timing is correct (tune on a load control dyno with live HP output, rare to find)... then who cares what the EGTs are.

skip the egt.

 

The techedge Wideband O2 is much cheaper, plus it has logging capabilities.

Techedge Wideband Group buy

 

yes good call... the techedge setup that skidazzle posted a screen shot from looks like its the ****.

seems very cost effective and comes with its own datalogging software. We have a FJO wideband that we use sometimes... the techedge software looks nicer, and it datalogs more then our FJO... but FJO might have a better option by now I dont know.

The HKS one I bought for the 350z is way overpriced but it just looks so nice that I had to have it. It has a 5V output for datalogging but you are on your own for software. Me personally I can just wire it to the FCON for datalogging.

I like that techedge, I would have to say that if I needed a standalone wideband setup right now... that would be the one to buy. I think skidazzle has a group buy going on.

Skip the EGT, get the techedge.

 

If data logging isn't a requirment, I have a line on the AEM Wideband for $425. PM me for details.

 

thats a good deal too, but isnt the techedge even less than that?

 

so the egt cant work in the cats, but the aem wideband can? is that right?

 

The AEM wideband has rudimentary logging capability via both serial output and variable voltage output.

--Steve

 

Yes, and the AEM logging really sucks when used with a serial output.

 

EGT is actually a great idea. Must be within 3 inches of head for best results though. On the TT kits it can certainly tell you if something is wrong. With timing set up and tuned properly, the gauge will tell you if something is wrong with your AF mixture. A wideband such as the Turbo XS Tuner is very nice to have but obviously more expensive, bulkier and harder to install.

 

I'm going to write a little custom app that will work a lot better than hyperterminal at recording the output values. Too bad you sold yours

--Steve

 

I thought about writing something but then I didn't know how I'd get RPM's etc.. How are you going to record RPM?

I'd rather have a FJO or Techedge anyday over the AEM. Just my opinion.

 

Phunk, I disagree. I live by the EGT readings.

Does the AEM have an analog otuput? Mabye the profec e-01 could log it.

 

The AEM Wideband according to their site has an analog output.

*Excerpt*

User-programmable 0-5v analog output included for use with data loggers and ANY engine management system