Individual Cylinder Exhaust Temps

[Gav]

Saw something at work today which got me thinking. On some underground mining equipment, there are exhaust temp senders that are only 15 mm and screw into a 4mm socket. These give individual exhaust "runner" temps. Each probe was around USD80 from a European Supplier. This doesn't include any fittings or gauges. The output is a 4 to 20 milliamp rating that is very easy to convert back to temps via the supplied table.

OK - my point.

Is it worthwhile fitting one of these probes to each runner of an aftermarket manifold? I would imagine that there may be some turbulence generated, however the probes are only 3 mm or so in diameter and only need to just go into the exhaust gas stream.

Possible uses would be for trimming of individual cylinders during tuning as well as letting you know if an injector is blocking (for example).

Any thoughts?

[Bass Junky]

Would be VERY cool to see, but what are you going to just to display them all together.

* Bass has visions of six DEFI EGT gauges on the dash *

hmmmmm.

[Sydneykid]

Saw something at work today which got me thinking.  On some underground mining equipment, there are exhaust temp senders that are only 15 mm and screw into a 4mm socket.  These give individual exhaust "runner" temps.  Each probe was around USD80 from a European Supplier.  This doesn't include any fittings or gauges.  The output is a 4 to 20 milliamp rating that is very easy to convert back to temps via the supplied table.

OK - my point.

Is it worthwhile fitting one of these probes to each runner of an aftermarket manifold? I would imagine that there may be some turbulence generated, however the probes are only 3 mm or so in diameter and only need to just go into the exhaust gas stream.  

Possible uses would be for trimming of individual cylinders during tuning as well as letting you know if an injector is blocking (for example).

Any thoughts?

We have 3 fast and wide lambda sensors and we plug one into each primary exhaust pipe. Swap them over to the other 3 cylinders and with 2 power runs we have a full engine log. Gives individual cylinder A/F ratios. We also have a laser heat probe that can be pointed at each primary pipe which gives a good comparison of each cylinder's radiated heat. Both together would be cheaper than 6 heat sensors.

[ylwgtr2]

my brother runs a dragbike team and there data logger runs one each header

[RB30-POWER]

If your rich just throw a wideband O2 into each runner. Can't get any better accuracy then that.

But it looks as though even SK isn't that rich

Out of interest, how do they tune V8 supercars, or are the manifolds flowing that equal flow anyway?

[Gav]

We have 3 fast and wide lambda sensors and we plug one into each primary exhaust pipe.  Swap them over to the other 3 cylinders and with 2 power runs we have a full engine log.  Gives individual cylinder A/F ratios.  We also have a laser heat probe that can be pointed at each primary pipe which gives a good comparison of each cylinder's radiated heat.  Both together would be cheaper than 6 heat sensors.

Agree that wide band lambda will give more accurate information, but this is only for initial tuning right?

I guess that I'm thinking about having something installed permanently. I don't think that this would extend to having 6 gauges nor does my ECU have 6 aux inputs, but perhaps a single gauge with a 6 position switch (or 3 gauges with 2 positions...you get my drift).

Just some food for thought about modifying the manifolds when they're off for accepting probes.