| Author |
Message |
Jack Conrad (Jackconrad)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 26, 2005 - 7:35 pm: | |
First the new question. I am getting ready to install the thermocouple for my pyrometer. The thermocouple came with a weld-in fitting. Looking at my 8V71, I see 2 possible locations, (I do not want to try drilling and welding the cast iron headers), the cross over pipe which will read only the right cylinder bank or install in the sweep that goes to the muffler. This will read both banks but will be about 12 inches from the engine. Any suggestions?
Now the answer. I inquired about my fuel pressure gauge that was reading backwards. I called Gaffrig Performance Gauges, where I purchased the sender. His first question was "Does the gauge say Gaffring Performance or Gaffrig Precision Instrumants on the face". I was on duty and could not check until today. Seems this is 2 differnt companies and apparently Gaffrig Precision Intruments uses 30ohm for 0 and 240 ohm for full scale. I will confirm the reading on my sender tomorrow and try a 240 ohm resistor on the gauge to see what reading I get on the gauge, but it looks like I either replace the sender or the gauge to get a matched set. Thanks, Jack |
JJ
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 26, 2005 - 9:13 pm: | |
Thanks for the follow-up on the guage situation. ...JJ |
Tim Strommen (Tim_strommen)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, July 27, 2005 - 1:51 am: | |
New Question: Consider what will happen if you have a turbo-charger and a super-heated chunk burns off and gets ingested in the turbo fins... While the header mount will give you a more acurate reading, mounting it behind the turbo could prevent a catastophic failure of the turbo, and the actual temps can be compensated for with some simple math to get the the real temps and just remeber what the display shows.
Old Question (and answer):
I'd replace the gauge. Don't go proprietary (which it seems Gaffrig is), keep with the industry standard (which it seems the SENDER is.)
Cheers!
Tim |
Jack Conrad (Jackconrad)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, July 27, 2005 - 7:23 am: | |
I forgot to add, this is a non turbo 8V71N. Jack |
Tim Strommen (Tim_strommen)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, July 27, 2005 - 3:32 pm: | |
I'd put the pyrometer probe as close to the cast iron pipes as possible, They will soak up heat and make the readings more stable, as transients in the heat output of the engine exhaust will appear more readily on the gauge this way. However...
Be cautious with diesel exhaust! It can be VERY HOT. Plan your probe placement so that if it "burns out" of the pipe, or your weld breaks, hot exhaust gasses don't blow on ANYTHING combustible (think fuel/oil lines, wood panneling, the fire wall, etc...) If you're not cautious here you could burn your dream rig to the ground very quickly, at the safety risk of your family.
Try to place it on a side where there is 180deg x 180deg of safe space at least 8" away from anything incase of failure (this will also help the probe get acurate readings on the pipe-side end of the probe as opposed to polution introduced on the wire-side).
Cheers!
Tim |
Jack Conrad (Jackconrad)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, July 27, 2005 - 6:47 pm: | |
After a closer look at my exhaust system, I found that if I install the probe in the sweep that goes to the muffler, the probe will be about 6" downstream to the cast iron piece the comdines the exhaust from the 2 exhaust manifolds. This will also unsure that if the probe should burn/break, it could only go into the muffler. Thanks fro all the help. Jack |
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