Boost, Pyrometer, Trans Temp Guages
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Beer Fridge Finder
Joined: Apr 2003
Posts: 14,988
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From: Savannah, GA
Boost, Pyrometer, Trans Temp Guages
Hey fellas - just installed three new guages in my 2000 crew cab 4x4 PSD. Its all great and they move around and stuff, but what numbers should I be looking for? How do I know what too hot of a tranny is? Exhaust? Boost? What are the upper and lower limits that I should be aware of?
Thanks!
Thanks!
Posting Guru
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On a stock truck you should see about 18psi of boost at WOT. EGT max is 1250* pre-turbo and you should let it cool to 300* or less before shutting down. I don't think the tranny should be over 210* but am not sure on that one.
Posting Guru
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If it is post turbo you may be seeing as much as a 450* loss of actual EGT so there is no real cut off point. Measuring EGT is just that, exhaust gas temp which you want to monitor as close to the exit of the cylinders as possible. I have a clamp-on thermocouple mounted pre turbo that you can see in my pics. It is next to the exhaust manifold on the driver's side.
Laughing Gas
Joined: Apr 2002
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From: Newport News
Where did you get the clamp on thermocouple? How accurate is it? I have a post turbo probe in the downpipe now, but I want to add a pre turbo. I know it's overkill to have 2 guages for temps, but I figure there's no reason to remove the first one. Plus it would be interesting to see what the difference is.
Terry
Terry
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Beer Fridge Finder
Joined: Apr 2003
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From: Savannah, GA
I would be VERY interested to know what the temp differences are, so if you do install another guage please post what you find out.
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Laughing Gas
Joined: Apr 2002
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From: Newport News
I'll definitely do that. I know a couple guys on another web site are running dual pyro guages, but they haven't ever posted anything about the specific differences. Once I get it installed (couple months) I'll let everyone know what I find out.
Terry
Terry
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From: Cabot, Arkansas
A post turbo thermocouple is a very bad idea. The difference between it and a pre turbo can vary from 0 to 600 degrees depending on the load, speed, throttle position etc.
Generally 850-900 is used for a post turbo EGT redline, but you won't have any way to tell if you're actually at 1200 or 1500.
Generally 850-900 is used for a post turbo EGT redline, but you won't have any way to tell if you're actually at 1200 or 1500.
Posting Guru
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Junior User
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From: Canterbury - A beautifu but overpriced rural setting in central NH
Originally posted by basstardo
I know it's overkill to have 2 guages for temps,
I know it's overkill to have 2 guages for temps,
The reason I alway use examples of Dodge Cummins owners in my posts is because I subscribe to a wonderful magazine, aimed directly at such owners, The Turbo Diesel Register. It is loaded with technical information and hands on articles. At one time I subscribed to the PowerStroke Registry. It turned out to be a mediocre travel magazine. Seldom was there an article with any technical meat to it. So I drive my Ford with a big grin, and read about Dodges to keep that grin in shape.
Laughing Gas
Joined: Apr 2002
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From: Newport News
Not a darn thing wrong with overkill, but some people probably would see it as overkill. Heck, I pull a 14' aluminum bass boat with my truck...that's something a car could pull. I'm not building a 750+ horsepower rig, so for my application I think it is overkill (still gonna do it though ).
Terry
).Terry
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From: Lisbon usa
I was up in the air about whether or not to go pre or post turbo when installing my pyro so I called Banks Engineering to find out how the monitored the egts on their systems.
ford is post turbo
gm is pre turbo
I brought up the point of temp differences etc. and was told that the difference is about 250 degrees in the post position so not to let the egt go above 1050 = 1300 pre turbo
I installed it post like they recommended and with SCMT set at 90/hp 175 torque and I am seeing a max of about 500-600 getting on it hard and about 400-450 normal. Boost is maxing about 24-25
When i asked about pre turbo and told them where i was going to mount the thermocouple the big question was. Why was i checking only one side of the motor.
If you want the technical reason why ford is post-turbo and gm is pre-turbo call banks tech support anf they will give you all the specifics.
I figured asking the the people that have been doing this for 30+ years would give me a little more insight
ford is post turbo
gm is pre turbo
I brought up the point of temp differences etc. and was told that the difference is about 250 degrees in the post position so not to let the egt go above 1050 = 1300 pre turbo
I installed it post like they recommended and with SCMT set at 90/hp 175 torque and I am seeing a max of about 500-600 getting on it hard and about 400-450 normal. Boost is maxing about 24-25
When i asked about pre turbo and told them where i was going to mount the thermocouple the big question was. Why was i checking only one side of the motor.
If you want the technical reason why ford is post-turbo and gm is pre-turbo call banks tech support anf they will give you all the specifics.
I figured asking the the people that have been doing this for 30+ years would give me a little more insight
