Is There Any Such Thing As An External EGT Sensor? (1 Viewer)

[turbocruiser]

Like the title says, I'm trying to find an external egt sensor, if it exists, IOW something that measures the exhaust gas temperature without having to be bunged into the tailpipe. Prolly wishful thinking but I figured if anyone would knwo, you folks would. Thanks.

 

[Polak]

The only externals I'm aware of are not fixed, they're more like probes.

Good luck!

 

[Lockd97]

Turbo,

This is where I pruchased mine about 4 years ago. I didn't need it in the truck after I was finished tuning it.
ifamilysoftware.com

 

[Scamper]

TC,

I could be wrong on this, but I don't think they make what you're looking for. The reason I would figure is because the temperatures on the outside of the exhaust pipes is considerably less than what's flowing at dead center. In the install instructions for the probe on my pyrometer, it's clearly stated that the tip of the probe has to be in the center third of the exhaust flow due to this temperature gradient.

So while you could measure the temperature of the exhaust pipe externally, that wouldn't be EGT, but something loosely related.

 

[turbocruiser]

TC,

I could be wrong on this, but I don't think they make what you're looking for. The reason I would figure is because the temperatures on the outside of the exhaust pipes is considerably less than what's flowing at dead center. In the install instructions for the probe on my pyrometer, it's clearly stated that the tip of the probe has to be in the center third of the exhaust flow due to this temperature gradient.

So while you could measure the temperature of the exhaust pipe externally, that wouldn't be EGT, but something loosely related.

Hmmm, makes perfect sense, thanks for that man.

 

[IBCRUSN]

Ditto what scamper said.

What is your concern about drilling a small hole in the exhaust pipe for a thermocouple?

 

[reffug]

OK turbo why?

What you got cookin in that skull of yours now.............Inquiring minds want to know.

 

[turbocruiser]

OK turbo why?

What you got cookin in that skull of yours now.............Inquiring minds want to know.

Well,,, with LandTank's new MAF installed, I can for the first time really start to incrementally increase the boost without much worry. I plan to go no more than ten pounds even if it is possible to go more. I also plan to incrementally increase .5 pounds at a time and gather good data. Among other things that I would want to measure is EGT. Its not that I'm worried with installing an EGT into the exhaust, I was just looking for an external one to sorta "set and forget". I think that I will endup with Autometers new wide-band A/F Meter which will use the existing O2 bung/s and also with Autometers EGT Meter which will require another bung be added. No worry to tap the exhaust. Ohh, I still want the Safari Exhaust System like you gots!!!

 

[IBCRUSN]

The nice thing about drilling and inserting a probe is you get to choose the location. Unless you add a bung for the O2 sensor you'd be stuck using OE locations.

I'm sure you've been researching this for some time and I don't want sound like an ass but if you forget the fact that aircraft engines are air cooled and much more dependent on CHT and EGT for indication there is a ton of info out there. Couple that with the info the tuner crowd has come up with and you could be busy for months reading it all. Pratt & Whitney published a manual many years ago (40's i think) that went into great detail about this type of information and the effects on engines. I don't recall the name of it but there is a guy on AVweb that sells copies of it.

Sorry for long response. Tuning turbo systems and even NA engines can get rather expensive if the parameters are not tracked. I know you're on the ball but others just crank up the boost and hope for the best. Good luck it sounds like great little project.

 

[reffug]

I plan to go no more than ten pounds even if it is possible to go more.

You do know that I have my system limited to 7 pounds at the moment and I really don't think I would go more even though I know the motor is capable. Wow if you really go ten I might have to fly out to ride in that sucker just to feel it and make a determination if I would consider doing that to my ride.

 

[turbocruiser]

You do know that I have my system limited to 7 pounds at the moment and I really don't think I would go more even though I know the motor is capable. Wow if you really go ten I might have to fly out to ride in that sucker just to feel it and make a determination if I would consider doing that to my ride.

I think that ten is safe - based on conversations with those wiser than me (Shed, Slee, Robbie, to name some) - I mean the bottom end is extremely strong, the top end was worked over by the master, and the limiting factor has always been Air and Fuel management. With LandTank's MAF I am almost never in open loop, all through the range I've got much better management, and at WOT I've still got much better management.

There are lots and lots of things to observe which will make it somewhat safer; I'm watching everything from intake air temp to exhaust temp, short term and long term fuel trims, O2 Sensor #1 and #2 output voltages, making sure that the timing curves indicate no indications of knock, coolant temp, and of course our error codes.

I'm gonna go up in super small increments and analyze all the data prior to proceeding further. This MAF has really opened up our possibities - it has greatly added alotta range to the MAF and it also has greatly added alotta resolution to the MAF, that PLUS the fact that there's simply so much less restriction in there, I sorta feel liek the ceiling was completely lifted from what was previously possible. We'll see, this is one of those things that if ANYONE has thoughts to the contrary, I REALLY wanna know way in advance!!! Wish Me Luck! Thanks.