EGT gauge question.....
 

I know the ideal place to mount the probe is in the exhaust manifold, pre-turbo. Is it OK to mount is post-turbo? I see alot of kits with the "header" probe that is held on with a hose clamp. Would it be OK to mount one of these in the downpipe? What kind of a difference in temp would there be between a manifold mounted probe and a probe in the downpipe?

The guys at Banks Power say that at full load an EGT probe after the turbo can be 200-300 degrees lower than before the turbo. They make products for truck, but it is still good info to read.

http://www.bankspower.com/Tech_whyegt.cfm

-Jim

It will work but it's not always the same amount of difference across the turbo. 900*f is a safe limit for post turbo.

If your going to do it, may as well do it right.

http://www.peachparts.com/shopforum/diesel-discussion/167588-pyrometer-thermocouple-installation-pictorial.html?highlight=pyrometer+pictorial