installing pyro sensor post turbo
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installing pyro sensor post turbo
I still have not figured out how to use the system, soooo if I could get some info on installing the Pyro Sensor I would be thankful. What I have planned is to just drill and tap into the elbow just downstream of the turbo but before the exhaust pipe mounting flange. The angle I'm looking at will put the sensor more or less running down the throat of the the elbow and should be dead center of the Inside diameter. Not much instructions with the unit, actually none. Recieved the sensor/wireing and what looks to be a collar/bushing that can be only screwed into on one end. Maybe this piece is for welding onto the exhaust pipe it self just below the flange. ??? Any comments, <br><br>Thanks,<br>Gene007<br>WarWagon
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Re:installing pyro sensor post turbo
Most folks seem to agree THIS is the best method and placement for the sensor probe - simply drill and tap for whatever size bushing was supplied with your probe, being as careful as reasonably possible to prevent stray bits of iron from falling into the insides of the manifold - grease on the drill bit is used by many to trap and hold the pieces, and a small mechanic's magnet run around inside the manifold down thru the drilled and tapped hole will get most of the rest - first time you start the engine, exhaust gasses will harmlessly blow the rest out - never yet heard any problems with drilling junk creating any problems if reasonable care is used... Pic below of typical finished install...<br><br><br><br>
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Re:installing pyro sensor post turbo
Thanks Gary, I had thought about putting mine the way you have yours. I will be installing a turbo-master boost controller, so the turbo will be coming off anyway but I don't believe I will put the probe pre-turbo. A little chicken. <br><br>thanks again, <br>Gene007<br>WarWagon
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Re:installing pyro sensor post turbo
Here are the instructions from TST<br><br>http://www.tstproducts.com/gauge_install.html
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Re:installing pyro sensor post turbo
Gene007,<br><br>sorry I cant help. :'(<br><br>But I did have a question. This is going to sound stupid But... Why do some people mount it pre-turbo, while others mount it post-turbo. <br><br>Dave
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Re:installing pyro sensor post turbo
[quote author=Maverick2001 link=board=4;threadid=16152;start=0#151745 date=1056166862]<br>Gene007,<br><br>sorry I cant help. :'(<br><br>But I did have a question. This is going to sound stupid But... Why do some people mount it pre-turbo, while others mount it post-turbo. <br><br>Dave<br>[/quote]<br><br>The fear of drilling a perfectly good manifold. But, like it or not. This is the only way to get a true accurate reading.<br><br>IMO..the post turbo reading is only good for turbo cooldowns. At times..the temp pre and post can vary 300-400 degrees at any given time.
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Re:installing pyro sensor post turbo
If you want to know how your engine is running the pyro must be pre turbo, otherwise you are just guessing what is really happening. Mounting the pyro post turbo is like mounting you auto temp gauge in the pan of the trans it is of little to no use at all.<br>Bruce
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#8
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Re:installing pyro sensor post turbo
It is true that post turbo readings are less accurate under most conditions however "all" commercial trucks mount the probes post turbo and have run that way for over 40 years. Two reasons for this, the exhaust manifold on a work truck is subjected to more consistant heat stress while pulling under load and will crack regardless of mounting location and the fact that probes have been known to disintegrate and go through the turbo taking it with them. Cat is infamous for burning out the center section of the manifolds and Cummins "pulse manifolds" crack on the back side of the center section where the heat Y's together. For the race enthuesiest the pre-turbo method is preferred for quick accurate readings to prevent engine melt down. My truck is always used for pulling loads so I mount down stream and have lost parts of my probes ending up only in the muffler. On large trucks anything post turbo under 1000F is acceptable for extended periods of operating with the exception of older Mack's where they would allow up to 1200F (Maxidyne Engines). My 91 had seen 1200+ post turbo which is approaching melt down, tell tale signs of excessive heat are a blue exhaust manifold and exhaust turbo housing. These trucks are very forgiving but one must realize the difference between intermittent high heat (racing) and continous maintained heat (pulling). PK
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