EGT probe on Downpipe vs Manifold?

[rudygetz]

I've read up on the FAQ's about many people putting the EGT prope on the exaust manifold. I was wondering if putting it on the downpipe would also work? I don't have a stock manifold off of a 1.6 td but something else so the location would differ too on the manifold.

Hope to hear from some members on here on downpipe vs manifold.

[libbydiesel]

The pertinent temp is pre-turbine.  Just as increased pressure increases the temperature of a gas, reduced pressure decreases it.  The pressure drops across the turbine based on exhaust manifold pressure and the efficiency of the turbine.  Good luck doing the math to figure out a pre-turbine temp from a post-turbine probe.

[theman53]

If you want a gauge just to have a gauge then you could put it post turbine. But as Libby stated the real information is pre turbine so that is the only place to put one if you want a gauge that actually does what it is intended and keep your engine safe

[rudygetz]

If you want a gauge just to have a gauge then you could put it post turbine. But as Libby stated the real information is pre turbine so that is the only place to put one if you want a gauge that actually does what it is intended and keep your engine safe

Thank you. I've just finished installing on my manifold.