pyro location
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Postmaster
Joined: Apr 2009
Posts: 4,086
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From: Malahat/Cowichan Valley
pyro location
Fellas,
have some questions about the location of my pyro. it is at this location,
illustrated because i for some reason didnt take pics, sorry. no i didnt use the banks joe, just showing my adaptation for pyro location. It is right at the exhaust manifold flange. Literally right below the flange. it is reading proper to my knowledge but i need to know something....... So with no load in or on the truck but me and a full fuel tank i can hit 850 going pedal to the floor heading up my hill to my house, not my driveway but my main road. ?Its steep and most people go 30mph, it was late so i ran it out and floored it, got to nearly 50 mph and thats where i hit 850. Am i good to pull 2500lb horse trailer with two 1klb horses as long as i watch the pyro? what about max temp? im thinking 1100 but id like to not see 1000. What is my max temp? thanks!!
have some questions about the location of my pyro. it is at this location,
Logistics Pro
Joined: Sep 2010
Posts: 4,411
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From: Victor, MT
THat horsetrailer is fairly small compared to what i pull, when my dad pulled his two horse trailer with two 1k lbs horses it ran him about 975 @ 65 mph. He had the truck turned up 1 flat i believe. This was up a 7% grade pass in montana. If you put that load on the engine and try it on the same hill, then see what it does. And personally I would have tapped the manifold @ cylinder Eight, which is about as close as you can get to the piston.
Posting Guru
Joined: Mar 2005
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From: KY
All you big trucks have them about 4 inches from the turbo going out the exhaust..I wouldn't want it in one of the manifolds because you are not getting the temp of the entire exhaust just one bank. 1000 degrees isn't high at all for a engine in a road tractor. Seen allot of them run 1500 under a hard pull and have been told several times by multiple manufactures that unless you are staying at 1800 to 2000 degrees constantly there won't be any problems. Now our parts,valves,pistons etc. may be junk compared to the ones in an ISX Cummins also or an old 5EK 3406 Cat. That would make a difference.
Posting Guru
Joined: Jul 2004
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From: West Valley Utah
I was told that the gauge is calibrated to compensate for difference in temp from the cylinder to the probe when the probe is installed in the exhaust outlet.
ATS told me this in 1990 with my first turbo install and a Cat mechanic said the same thing on my 85' 3406.
Of course that is with stock gauges. It does make sense though. Why would OEM place a probe in that location knowing the temp difference without calibrating correctly when they have to warranty everything? Every industrial diesel I've run from the 60's through the 90's have had the egt probe post turbo!
I would have crapped myself if I ever saw 1500-2000 degrees on my cummins or cat. Seems trivial now but I paid $13,200 for a complete 400 cummins recon in 1981.
ATS told me this in 1990 with my first turbo install and a Cat mechanic said the same thing on my 85' 3406.
Of course that is with stock gauges. It does make sense though. Why would OEM place a probe in that location knowing the temp difference without calibrating correctly when they have to warranty everything? Every industrial diesel I've run from the 60's through the 90's have had the egt probe post turbo!
I would have crapped myself if I ever saw 1500-2000 degrees on my cummins or cat. Seems trivial now but I paid $13,200 for a complete 400 cummins recon in 1981.
Posting Guru
Joined: Mar 2005
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From: KY
Mitaken,I can't say anything about cal. When I checked one that was not working,which was pretty rare. We had a test box that checked the probe and then the gauge. Which ever one didn't work then you replaced it. Haven't ever seen a factory manifold drilled for one in a truck. Be honest it wasn't something that I ever went off of when checking a complaint on a truck. I have seen the same truck,same engine be a few hundred degrees different and seem to run the same. I haven't driven allot of miles over the road but I have driven several hundred trucks over the years test driving. Seems like they are all over the map. I figure too that if the manufactures were that concerned with temp they would have monitored it years ago in programing on the engines. They just have started it with the new exhaust systems.
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