Getting ready to install a pyrometer for my new Bully Dog Outlook monitor. I have two pretty simple questions.

1. What fitting is needed? 1/4" Tube x 1/8" NPT?? Where can I find one of those?

2. The instructions say to mount the probe pre-turbo. EXCEPT for the Dodge. BD recommends post turbo on the dodge. Any idea why that would be? Why would post turbo be better?

 

pre turbo will show more accurate egt temps. the turbo will get damaged by the higher temps. all other probes are pre turbo.

 

heres a link i like to throw around seems to make good sense, did mine with the engine running that worked out good for me others will disagree.

http://www.dieselmanor.com/diy/CMS3-gauge/G3image1.htm

 

Mlucas, you're right. Every other gauge I'v looked at - and every instruction set I'v looked at - says to installl the probe pre-turbo. So why does BD recommend post turbo install? What's differant about the Dodge and the BD? There must be something about it, or BD wouldn't recommend it.

I read the instructions for the Edge monitor. They recommend it be installed pre-turbo.

 

I installed 2 pyro probes with my Bullydog and monitor them both with the outlook monitor. One is pre-turbo like the picture in the above post and one is post-turbo in the cast elbow. The temps stay about 200* to 300* apart (pre-turbo is hotter) depending on how hard I accelerate. I don't think it will matter where you chose to install the probe, just remember that in the post turbo location the exhaust gasses will be a little cooler.

 

I'd be more worried about the pistons.

 

Don't tell me I'v stumped the experts!

Anybody know where I can buy the correct fitting for the pyrometer?

 

the closer to the ex port the more accurate the temp is... the ex temp drops a lot in just a few inches...

 

Your thermocouple should come fitted with a 1/8npt adapter. Isn't there a like a little threaded collar on the end of it? If so just drill, tap and screw it in. Don't go too deep to start with.

 

The further away it is from the source, the cooler it will be. Makes sense to me. I wonder why BD recommends the cooler temps? I think I'll just put it in the manifold like everything else I'v read.

The collar is there. But I don't have the adapter. I bought the unit used. I just need to find a new adapter. I'll try to find a diesel performance shop in the area and drop by.

 

any good, non-chain auto parts store should have the fitting...

 

You would think so, wouldn't you? At least, that's what I thought.

 

UPDATE:

I spoke with BD tech support. Asked them the same thing. They told me it was personal preferance where the probe goes. Pre-turbo is more accurate, but post turbo is easier, with less risk to the turbo.

Also, I went to a number of places in town looking for that fitting. No luck. No part shop carries it. None of the diesel shops I went to had it either. BD is going to mail me one.