cat delete pipe

[travisH3]

nevermind, new question. does drill and tapping the egt probe seal the exhaust good enough. or is it better off to be welded

[travisH3]

nevermind, found out already. i got a new question now.
if i drill and tap my exhaust for my egt probe. will it seal good enough to not leak exhaust and diesel soot or is it better to weld it??

[PGreenSVT]

Drill and tap the exhaust manifold and it will be fine. Welding cast iron is a real PITA.

[travisH3]

im doing it post-turbo. in the exhaust down piperight after turbo

[PGreenSVT]

That's the wrong place to put it. You want to see the exhaust temps leaving the cylinders not that far down stream after powering up your turbo. Your temps will be off by 200-300 degrees in the down pipe.

[travisH3]

i didnt want to drill my manifold and worry about pieces and what not. i dont have an egt gauge at all, i just figured if i had it in the downpipe i could see what my normal operating temp is and stay close to it and see the temp difference when towing.

[Lilpooh]

It will not be accurate enough, I use to have mine in the down pipe right after the turbo. When I relocated it to the manifold it was a whole different story. When it was post turbo, I never saw egt temps above 1000* while towing with a custom tow tune, pre turbo while towing I can hit 1200* with the same tune.

Post temp with extreme race tune I never went over 1200*, pre turbo I can easily hit 1400*

[travisH3]

so i guess if i dont feel like drilling my manifold then no egt gauge for me. i just thought it was easier to tap the down pipe but if it aint accurate then i aint gonna worry about it. i may eventually get it hooked up

[pizza pig]

what do you have against tapping the mani? its super easy and just use a vacuum after drilling and tapping and you'll be all set.

[travisH3]

i guess im just scared at screwing something up