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Egt Sensor Systems , Whats Good For Rbs ?

discopotato03

By discopotato03,
in Engines & Forced Induction

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discopotato03 Grand Master

discopotato03

Posted
Posted

Hi all , I've searched around to see what's available to suit an RB turbo engine . It seems you need the sensor and an amplifier box to change the signal output to 0-5V for 0-1000 deg C . I'd like to have this wired into a Vipec ECU so I can monitor it and maybe build in some fail safes .

I was thinking of mounting the probe into a steel T3 spacer plate and lining up with the cast manifolds divider to reduce flow losses - and avoid tapping into iron with differing expansion ratios . Also upstream of the turbine should read closer to actual EGT .

Can users report on what they're using please , cheers Adrian .

R_34 Community Regular

R_34

Posted
Posted

I'm using a VEMS gauge which have AFR and EGT display on one gauge.

I installed the probe in the turbine housing, right after the flange.

To my experience, if you want a precise measure of actual EGT, you'll need to use a reactive probe, which means a thin TCK (ie 1.5mm or smaller). Unfortunately these never last long on turbocharged engines with high EGT/backpressure and strong waves in the manifold.

I prefer having a more rugged (and less reactive) probe in the housing and getting some safety margin in the maximum allowable EGT when I'll get it tuned.

GTSBoy Grand Master

GTSBoy

Posted
Posted

I also installed a 3mm diameter probe into a hole drilled and tapped in the inlet of the exhaust housing. Works well. I just used the sensor that came with a cheap Chinese/Taiwanese stepper motor EGT gauge. Has been in service for a couple f years and is fine. If teh probe ever dies, a thermocouple shop can sell me a replacement type k probe in seconds.

400°C idle, 500°C very light cruise, 600°C cruise with some extra load. 700°C a bit more load. 800°C, starting to get stuck right into it. 900°C - that's about as high as it ever gets.

R_34 Community Regular

R_34

Posted
Posted

I'm on the standard tune, lower boost and I have much lower readings in WOT. Mine don't even reach 800°C, its more in the vicinity of 750°C.

The rest of the operating range I get about the same readings.

On standard 98 RON fuel.

GTSBoy Grand Master

GTSBoy

Posted
Posted

BP98.

I am also on the standard tune, but running right up in the right hand corner of both the fuelling and timing maps because I have about 12 psi. I think the retarded timing in that part of the maps must be pushing the EGT up even higher than the rich mixtures are pulling it down!

scotty nm35 Grand Master

scotty nm35

Posted
Posted

I also installed a 3mm diameter probe into a hole drilled and tapped in the inlet of the exhaust housing. Works well. I just used the sensor that came with a cheap Chinese/Taiwanese stepper motor EGT gauge. Has been in service for a couple f years and is fine. If teh probe ever dies, a thermocouple shop can sell me a replacement type k probe in seconds.

400°C idle, 500°C very light cruise, 600°C cruise with some extra load. 700°C a bit more load. 800°C, starting to get stuck right into it. 900°C - that's about as high as it ever gets.

Exactly what I did, 1/8 bspt thread. And I see much the same temps in the turbo entry. My egt probe has been fine for 3-4 years.

I recorded around 100c difference between the manifold and the dump.

Running United ethanol btw.

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