Quote:
Originally Posted by Abitibi
As you guys can see from the picture I posted above my probe is directly after the turbine, so between the turbo and the downpipe. This way I get reading from both sides of the engine unlike when probed into the manifold or up-pipe. At the end of the day these readings are useful when compared to your normal baseline so you only start to worry when it goes outside of your established parameters.
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Agreed, and with that placement you also are monitoring all cylinders instead of just one side. The main thing is knowing what temps to limit the exhaust to. My probe was originally located post-turbo in the downpipe and I would add 250 to 300F to the readings with 1000F being my upper limit. My understanding is that was about the same as 1300F pre-turbo. Getting much above that for extended periods and melting a piston becomes a reality.
Anyway, when I did all my heat mods I replaced the up-pipe (the bellows were starting to crack) with an MRBP up-pipe with flex bellows and welded a bung and installed the EGT probe close to merge of the Y instead of in the manifold. Thus, I am also monitoring both sides but the temperature isn't as hot. I checked with a heat gun and the amount of cooling is about 50F so I add that into my readings.
With heat mods (cerakoting and wrapping the pipes) and a cat delete with a better muffler EGTs were reduced ~150 to 200F. I'm making close to 400HP with PCM and FICM tuning and don't have heat issues.