pyrometer for exhaust temp

[sledhead]

I was thinking about installing a pyrometer for my 6v92ta but heard that the 2 strokes do not need them ? is this true ? and there is a problem with the 40' run for the wiring
If I install one which one is best ? 

thanks again    dave

[lostagain]

Mine on my 6V92TA is just after the turbo. If the gauge is accurate, it fluctuates between 200 and 300F. I don't remember ever seeing it above 350. So I would not miss it if I didn't have it. It would be more meaningfull if the thermocouple was before the turbo, if you are not afraid of it breaking.

JC


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[luvrbus]

The 6V92TA runs at 700 degrees @ 1800 rpm before the turbo  FWIW there are bosses in most manifolds on a 92 series to screw the probes into   

[Jim Eh.]

You can weld in a half height merchant coupler (1/4" NPT). Pipe thread half nipple made from malleable steel (not cast) if there is nothing in your pipe to receive the thermocouple. But I would think your engine coolant temp would be of greater concern on a hill? Or is this just to manage your mileage?

[sledhead]

It is all I can do to keep my temp. at 180 f ( runs cool ) if it is below 32 f and I have never been higher then 185 f when its hot out ( 180 f t stats ) . I was just curious as in the hills I never see the temp. gauge move . I due have a 1/4 " plug after the turbo say 8 " past

dave

[Jim Eh.]

That is port for the thermocouple of your pyrometer. Be gentle tho, they don't like to come out too easy after they have been in there awhile. Do you have a mig welder?

[bevans6]

What do you hope to learn from knowing the exhaust temp after the turbo?

Brian

[akroyaleagle]

Dave, If you want a pyrometer, install one. They don't cost much and are easy to install.

Mine loafs around 200-300 dgrees. I can get it to 750 in a hard climb if I try. I may have more boost than you.

I installed mine in 2000 with the new 8V92. I too was a bit puzzled about the cost of the shielded wire in 40' lengths.

On the advice of the mechanic that installed the the engine, I went to home depot and bought 70' of thermostat wire (2 wires). $.07CN at the time per foot. About $4.00 US. This is the same wire that probably controls your furnace in your house.

Many folks have told me that won't work, but mine has worked for 15 years now.

Don't be afraid to install what you want. It's your bus!

You probably should read up a little on turbine temperatures so you can install the probe where it measures what you want to see.

TOT = turbine out temperature
EGT= exhaust gas temperature
TIT= turbine inlet temperature (no reason for this as far as I know.)
etc.

I measure exhaust gas temperature just past the turbo.

Good luck,l

[Geoff]

I like my pyrometer because it starts climbing up before my temperature gauge does.  Mine also never goes over 300F, but it tells me the engine temp is going to go up so I hit my radiator sprayers before the engine overheats (over 200F-250F on the pyro is a warning).  And the engine will overheat and automatically shut down with the Pyro at or over 300F. 

--Geoff

[TomC]

I once saw a sign on a yacht that said "anything over 1200 degrees costs $$$$" Hence on a two stroke, you'll not get enough exhaust temp to get close to that. Don't waste your time if you don't have one. Good Luck, TomC

[Bill Gerrie]

I have a pyrometer in each exhaust manifold of my 6V92 DDEC IV. They normally run around 600*F and on a hill with your foot into it they will rise to about 800*F. They are installed in the bend in the exhaust manifold just after the last exhaust port. 

[luvrbus]

That is where they mount a pyrometer is not much good after the turbo on a 2 stroke IMO

[lostagain]

I installed the probe before the turbo a few years ago on my 6liter Powerstroke when I put in the Bullydog programmer. I take it out once in a while to make sure it won't disintegrate into the turbo. So far so good. The ones in my bus and in the 3406B in my Pete are after the turbo, and have not broken either. I think it would have to be in there a long time without looking before it brakes off and goes through the turbo.

JC


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[sledhead]

thanks for all the reply s I think it is more work then it is worth

dave