Installed an EGT Gauge today..., Only took 10 minutes Options

[TimT]

Aaron, Mark, you can extend an egt harness, you need the correct wire to do so

If you need to shorten the egt harness, dont cut it, just coil it up and store it neatly. Also you can add a four way switch if you like four way switch

[McMark]

Huh... Neat! (IMG:style_emoticons/default/biggrin.gif)

But that's a special switch, just throwing in any ol' two or four way switch will likely create false readings, right?

[type11969]

I've got an LM-1 with the aux box, it lets you log in the LM-1 box afr, rpm, 2 axis acceleration (backtrack out hp easily), map, cht or egt (long thermocouple wires included), and a number of other inputs that you choose. And if you have a laptop you can monitor it all real time (or you can buy gauges). Its very useful to have, especially when performing an inital tune on a new engine. I do feel a little fast and furious when I am crusing down the road with a laptop open in my passenger seat!

If you are considering buying the rpm box for the lm1, I suggest you save up the extra 150 bucks to get the aux box to get the extra features.

I have the O2 sensor bung welded on my header and with the Dells it would be a waste to use an O2 sensor...

Not so quick, the Formula Vee and Formula First crowd use the Innovate LM-1 for tuning their motors. They only run a single carb.

SR Racing sells them. Here is what they said:

A high quality Wide Band 02 Sensor with Data Logging (44 minutes) and expandability. We use one here at the shop on our engine dyno.

The LM-1 can be expanded with the addition of the RPM Adapter and you have Wide Band 02 Sensing AND 4 additional inputs for anything else you want to data log (Temps, Pressures, RPM, Throttle position etc.) Fully programmable for mapping to any type of sensor you can think of.

So that bung might be useful after all.

Mark, thanks for the post and link to the site. The CHT dual gauges are affordable and two would allow you to moniter all four cylinders.

[ME733]

............Well aircraft spruce is a good source for the EGT guage and parts. THEIR products are FAA approved.....which means they are the highest quality you can find.....some of the other brands are NOT.........then with all the genius EGT users making comments NO ONE has said ANYTHING, at all about the required location of the temperature probes to achieve accuracy of the combustion temperature....the EGT....readings.........FINALLY ....reguardless of what you have heard or read or have been told here is the facts.....EGT readings of 1275 to 1375......THESE temperatures are suitable ONLY FOR FORGED PISTONS...read FORGED PISTONS ONLY..........heres why.....at 1400 degrees a (typical) forged piston has lost 1/2 ONE HALF of it,s strength./structural regidity......(this is why you see drag racers, replacing pistons after every run.)(in the higher classes)..(even tho they have overkill in piston design) the temperatures and fuels (nitromethane)..shatter..in small fractures...their pistons , forcing replacement or a lost engine.......SO consider this....a CAST PISTON is NOT as strong as a forged piston....this is why cast pistons in stock engines are heaver than a replacement forged piston....they are making up for, in total mass, their lack of strength, as compaired to forged.....also cast pistons do not expand as much as forged , therefore, tighter cylinder wall clearances work fine for stock engines....BUT a EGT of 1275 degrees is NOT , NOT suitable /safe/or smart to use with cast pistons.....................................hope this saves you an engine.murray.

[Jake Raby]

If ind that the TIV engine is VERY responsive at WOT to timing adjustments in relation to EGT values.

There is a big difference in EGT values at cruise and WOT and the points of failure related to them. I only pay attention to EGT at WOT, at cruise and light load EGT can be 1500F with no adverse effects.

Don't even look at the EGT gauge if you are at anything less than WOT on an N/A engine.

I use Westach and SPA EGT gauges in the dyno cells and in my personal cars.

This post has been edited by Jake Raby: Apr 12 2010, 10:19 AM

[ME733]

...westach...is available at aircraft spruce.....and is FAA rated. westach is installed in many O.E.M. aircraft, and they have many, many , variations of instrumentents, of all types and uses, including CHT, EGT. the EGT probes MUST be installed at a particular point in the exhaust system, or the combustion temperature reading will not be accurate. the location is furnished in the instructions.

[ChrisFoley]

Westach is cheap.
You get what you pay for.