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

[McMark]

I've had this Exhaust Gas Temp gauge sitting around for a couple months and while I had the car up on ramps getting a new fuel filter (and it needed it!) I decided to pop this guy in place.

I got the parts from Aircraft Spruce, this guage, this clamp-on probe, and this 15' extension cable. All told, I spend around $100. This gauge has the benefit of being semi-original looking, ambient temperature compensated, and matches my Micro1000 CHT gauge.

All I did to install it was drill a small hole in the exhaust tube, and insert the probe, tightened everything down, attached the cables and ran them to the cabin.

I drove the car around the block, which was very interesting. My car has been running very poorly ever since returning from the RRC, and I thought it was just the fuel filter. But it's not. It was very interesting to watch the needle moving as I opened and closed the throttle and it also helped me visualize the problem that I'm having. My car has been intermittently losing power, and I would be driving along at a nice EGT, and the car would lurch, and I would look over and the EGT was extremely low. And since it is my understanding that EGT is more affected by timing than AFR, I can be pretty confident that for some reason my timing is wonky. This may be the KitCarlson EFI dying or a bad wiring harness connection. It might be time to *GASP* install a spare set of carbs and a Mallory. (IMG:style_emoticons/default/ohmy.gif)

This was an affordable and easy upgrade. I expect that it will be a useful tool for tuning the motor and if anyone has an extra gauge slot to fill, I would recommend an EGT after you have a CHT.

[McMark]

According to my reading on the RAT Forums, 1275 is a good temp for WOT, and at 1375 you should start looking for your motor to explode. (IMG:style_emoticons/default/cool.gif) But I have no real world experience at this point, my reading ranged from 900 to 1400 at various points and was changing rather quickly. I only took a quick trip around the block to test out the EGT and to see if my new fuel filter fixed my problem.

[ConeDodger]

According to my reading on the RAT Forums, 1275 is a good temp for WOT, and at 1375 you should start looking for your motor to explode. (IMG:style_emoticons/default/cool.gif) But I have no real world experience at this point, my reading ranged from 900 to 1400 at various points and was changing rather quickly. I only took a quick trip around the block to test out the EGT and to see if my new fuel filter fixed my problem.

Hi Mark!
Glad to hear you got out of the new house for a bit. Did the EGT guage have a screw in sensor offered? I have the O2 sensor bung welded on my header and with the Dells it would be a waste to use an O2 sensor...

[gregrobbins]

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.