I under stand what the gauge and is used for and can prevent, but is it a MUST have gauges for mild climate?

 

Not really a must have...but nice to have.

 

EGT is old school and not gauge worthy anymore now that we have wideband A/F gauges.

 

Not bad to have, in addition to a wideband. EGT is still important - you can have a perfectly safe AF and still melt down a motor. I agree with sharif, not a must - but they are nice for tuning.

 

Exactly- in addition, I don't think that cooler temps are still gonna make that much of a difference. If you are gonna go FI, might as well pull out all the stops and cover all of your bases.

Look into the Zeitronix gauge (what I use), has boost, AFR (as well as lambda....that in itself ispretty useless), and EGT.

It's pretty crazy, sometimes mine would read 1,600 degrees under a heavy load clsoe to WOT. Not sure how accurate it was but I'm sure it was accurate. It's amazing how much heat is generated.

Anyone know the tolerances of the VQ's internals for heat?

 

The problem is that by the time the EGT levels get too high, you've already blown the motor. EGT's don't react as fast as A/F.

 

If you have your EGT probe positioned correctly, it is not slow to react. EGT is not redundant or useless.

 

EGTs need to be mounted right off the head in a spacer plate and on each individual cylinder to work correctly and are a great tool if used properly.


one EGT sensor on one side is useless

 

100% correct.

It serves the purpose, of pressure checking your tune, once you "think" you are done. But for a low boost car, as the poster mentioned, not a must have device. At higher boost, thinks happen much more quickly, and drastically, so its nice to monitor EGT's.

 

BMEP washer like sensors between spark plug and head or those integrated inside special spark plugs............everything you measure adds to safety.

 

+1 The more you monitor all of the variables, the more information you have to make decisions... Because of all the variables involved, EGT can be a valuable piece of information.

 

check this out...anyone runing this?

http://www.zeitronix.com/Products/zt2/zt2.htm

 

yep...

 

how do you feel about it??

 

I am using the Zeitronix too. I really love it. It works really well and I installed it in such a way that I can hide it if I want to. Some pics of the unit and sensors:

http://www.science.uottawa.ca/~paul/.../G35TT075.html
http://www.science.uottawa.ca/~paul/.../G35TT094.html
http://www.science.uottawa.ca/~paul/.../G35TT095.html
http://www.science.uottawa.ca/~paul/.../G35TT096.html
http://www.science.uottawa.ca/~paul/.../G35TT097.html
http://www.science.uottawa.ca/~paul/.../G35TT125.html
http://www.science.uottawa.ca/~paul/.../G35TT088.html

Plus a few others at the same location.

I really like to be able to monitor EGTs on top of wideband O2 values.

 

Here is another usage, Vinny tunes the car with the EGT the EGT is important for Turbopowered engines

G
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What are the gauges needed for FI? Boost and what else?

 

Wideband O2 for sure, and maybe EGT.