Mychron EGT Placement

Mike Kuper · Joined: 24 Sep 2007 Posts: 15

Two questions concerning my Mychron 4 EGT Probe location.

1. How far down stream from the cylinder should I place the probe?

2. The probe looks like about 1/4" fitting that is held in place by a nut outside and one inside the pipe, will this hold it with lock tite okay or should I have a nut welded to the pipe?

Thanks

Lewis Cronis · Posted: Fri Feb 29, 2008 5:18 am Post subject:

A nut is welded to the pipe in the desired location.
The location of the EGT probe will depend on the engine/series.
For example, in Rotax, it MUST be placed (IIRC?) 50mm from the end of the ball portion of the flange.

Rick Worth · Posted: Fri Feb 29, 2008 8:55 pm Post subject: EGT

Just drill and tap a hole in the pipe & screw it in. We've done this for years. It takes a 5mm x .8 tap.

al nunley · Joined: 13 Nov 2006 Posts: 3038

If it was me, I would check the position with others in your class. With the Yamaha we placed the sensor 3.5 inches from the piston.

The exact postion makes lettle difference. What you want is the highest reading you can get at the position you set it at. If you want to compare it to others, place it at the same position they do.

I like the Digetron device for instalation, but I'm sure the Micron will work. Just be sure the tip of the probe is in the middle of the header.
_________________
If the data does not support the theory, get a new theory. (Al Nunley)
All else being equal; Compression is the Holy Grail.
45 years, in and around karting

Jason W. Haines · Joined: 26 Aug 2007 Posts: 18

Install guides for all AIM kart sensors including the exhaust gas thermocouple.

http://www.aim-sportline.com/pages/kart/section_kart_sensors.htm

al nunley · Joined: 13 Nov 2006 Posts: 3038

GLEN CHERRY · Posted: Fri Feb 29, 2008 10:09 pm Post subject:

Exhaust gas thermocouple

Aim instruments can measure and record the exhaust gas temperature using a sensor (thermocouple) positioned inside the exhaust header pipe.
All Aim thermocouples.are K-type sensors.
Installation notes
The exhaust gas temperature sensor should be positioned inside the exhaust header pipe at a distance of 150 mm (5.9 inches) from the exhaust port. In the drawing here below is represented a correct installation of the sensor.
To install the EGT thermocouple, please follow these instructions:
1. Make a 5 mm (0.2 inches) hole inside the exhaust header pipe at a distance of 150 mm (5.9 inches) from the exhaust port.
2. Weld the little nut to the place where the hole has been drilled.
3. Connect the remaining part of the thermocouple and fix it to the exhaust header.
ATTENTION: While running the thermocouple cable along the chassis, be careful to keep it as far as possible from other cables (such as RPM or lap receiver cables) so to minimize interference between cables.
_________________
OVER THE HILL OUTLAW

al nunley · Joined: 13 Nov 2006 Posts: 3038

[quote="GLEN CHERRY"]The exhaust gas temperature sensor should be positioned inside the exhaust header pipe at a distance of 150 mm (5.9 inches) from the exhaust port. quote]

This would be 7.9 inches from the piston on a KT100. Why to far IMO. I always set it at 3.5 inches from the piston face. One and a half inches from the exhaust port face.
_________________
If the data does not support the theory, get a new theory. (Al Nunley)
All else being equal; Compression is the Holy Grail.
45 years, in and around karting

Mike Kuper · Joined: 24 Sep 2007 Posts: 15

Thanks everyone, I a going to weld the nut on tobe safe and Btw I am running a maxter.

Thanks again.
Mike