EGT probes

Pin outs, sensor calibrations etc
RICE RACING
Posts: 448
Joined: Mon Feb 24, 2014 1:08 am

Re: EGT probes

Post by RICE RACING »

Need to put up some more real world long term reports on these, got a few who have recycled them from old turbo/manifold set ups over to new hardware, some even by mistake melted through the wires and simply cut out offending section and re spliced/insulated extension wire and they are good to go again :) the response on the probes is as posted before, we can read to a higher level of precision the actual EGT even in a super fast transient condition like 1st gear acceleration in a 4WD car. It opens up a world of per cylinder optimization and true high level durability of the sensor that you just cant get any other way especially comparing to inferior/fragile lambda probes for example.
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RICE RACING
Posts: 448
Joined: Mon Feb 24, 2014 1:08 am

Re: EGT probes

Post by RICE RACING »

Just as a reminder as I keep getting asked the same questions all the time :roll:
Update to the latest firmware if you are relying on the ECU internal egt inputs (and calibrate them with a simulator), you can then fix the known offsets that used to exist as you now have the ability to use the linearization tables and can tweak it so its accurate.
sumkunt wrote: Thu Jan 16, 2020 11:37 am very accurate
TC1-U13 V Omega error range in deg C

KT8 donmega.jpg

Image
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RICE RACING
Posts: 448
Joined: Mon Feb 24, 2014 1:08 am

Re: EGT probes

Post by RICE RACING »

Here is an example
6 x donmega probes on each cylinder (VR6 engine) you can see effect of longer path in cylinder head how it effects readings).
Also it has the inferior previous suppliers 'fast acting open element' probes fitted to the turbine inlet and turbine exit just before where the oxygen sensors are mounted.

Picture tells it all, how good are your probes can you trust them? :lol:

A turbine inlet probe is effected allot by the heat sink effect of the housing/turbo as can be seen, the donmega probe for same rpm/load, will always return a much more realistic figures.
donmega probe VR6YO.jpg
donmega probe VR6YO.jpg (965.19 KiB) Viewed 12009 times
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RICE RACING
Posts: 448
Joined: Mon Feb 24, 2014 1:08 am

Re: EGT probes

Post by RICE RACING »

Image

https://www.youtube.com/watch?v=yCwP76MbVko



(video link above)

Here is a longer term test on a 2.2lt 4cyl turbo engine running DONMEGA probes.
This was at ~550bhp engine power.
Fuel was petrol of low octane.
Run to test probes, knock control, long term durability and suitability of mechanical specifications.
This was 9.0:1 and not running doctored 'pump' petrol laced heavily with toluene

As some historical context for real racing engines.
Group A Ford Sierra (run at ~550bhp during a 1000km endurance race @ Bathurst) on same map see proof below, needed to run 7.0:1 CR (or lower) .


Contrary to the plethora of rubbish on the internet and online 'education' talking heads this is not detonation nor heavy knock, nor pre ignition, its rather what Renault F1 published in papers when developing their turbo engines referred to as 'runaway knock' its of a low order and easily confuses the knock control system as the absolute figures are on the lower spectrum but their frequency confuses the rolling average that sets the base to which the knock threshold then needs to exceed to pull ignition timing.

This engine had no associated damage to bearings, rods, head gasket, etc as you would typically associate with 'detonation' or excessive knock, but it did melt a piston and started to show signs on others of that eventually happening to more of them, took a long time to eventuate as well.

Hope this helps people out who are interested. The EGT probe is a very useful tool and I hope this first hand experience and detailed analysis shows that, any questions best to send me an email ;)
Last edited by RICE RACING on Wed May 12, 2021 8:12 am, edited 1 time in total.
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https://www.youtube.com/riceracingdonmega
Real turbo road cars fast > reliable > durable
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8jvr6
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Joined: Fri Oct 05, 2018 3:38 pm

Re: EGT probes

Post by 8jvr6 »

Are these DonMega thermocouples available for purchase ?
I’d like to grab 6.
RICE RACING
Posts: 448
Joined: Mon Feb 24, 2014 1:08 am

Re: EGT probes

Post by RICE RACING »

Send me an email please, thanks.
peter@riceracing.com.au
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8jvr6
Posts: 3
Joined: Fri Oct 05, 2018 3:38 pm

Re: EGT probes

Post by 8jvr6 »

RICE RACING wrote: Sun Mar 07, 2021 10:00 am Send me an email please, thanks.
peter@riceracing.com.au
Ok, I did send you an email last week. Trying again.
RICE RACING
Posts: 448
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Re: EGT probes

Post by RICE RACING »

Donmega probes everywhere!
These things are proving their worth, beating all others in response, accuracy, and durability.
Due to them working so well we are now using them to catch unstable combustion conditions, very handy to have, and fully integrated into Syvecs control strategies.
Last edited by RICE RACING on Thu Apr 06, 2023 5:26 am, edited 2 times in total.
http://www.riceracing.com.au
https://www.youtube.com/riceracingdonmega
Real turbo road cars fast > reliable > durable
Water Injection Specialist
RICE RACING
Posts: 448
Joined: Mon Feb 24, 2014 1:08 am

Re: EGT probes

Post by RICE RACING »

Another nice instal of the donmega probes
donmega VR6.JPG
donmega VR6.JPG (545.81 KiB) Viewed 10464 times
http://www.riceracing.com.au
https://www.youtube.com/riceracingdonmega
Real turbo road cars fast > reliable > durable
Water Injection Specialist
RICE RACING
Posts: 448
Joined: Mon Feb 24, 2014 1:08 am

Re: EGT probes

Post by RICE RACING »

Here is fitment of a donmega probe to read true Air Charge Temperature.
One probe any application :)

Video showing fitment and flexibility of placement, uses a 316SS sleeve to isolate conductive effects and large volume around tip when recessed to sample air in runner.



As a refresher here is how much faster they are than a 'fast acting air temp sensor' :mrgreen:
fPBUy1C.jpg
fPBUy1C.jpg (424.25 KiB) Viewed 10384 times
ACT1.JPG
ACT1.JPG (817.71 KiB) Viewed 10384 times
ACT3.JPG
ACT3.JPG (789.91 KiB) Viewed 10384 times
http://www.riceracing.com.au
https://www.youtube.com/riceracingdonmega
Real turbo road cars fast > reliable > durable
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