Engine/Transmission (1998.5 - 2002) EGT's whats normal?

[Motorhead]

Pre drill the hole first with a small drill. TAKE YOUR TIME in drilling and tapping the hole. Ck the fit of the fitting AS YOU TAP the hole out to get the probe fitting to fit just right in the EX manafold. protrude your probe about . 3 to . 4 inches into the manafold.

 

[new2dodge]

on an80 degree day mine runs about 950 post turbo empty down the highway once i down shift it goes to about 650-700. i usualy have about 20 min stop and go before i can really pay attention to my gauge.



99 qc sb 4x4 3. 54(5) diablo puck k&n 5sp

 

[new2dodge]

oh yeah one other thing doesn't anyone worry about the probe letting go and killing the the turbo when you install in the manifold?

 

[Roadhogz]

Never thought about the probe letting go.



Anyway I took motorheads tips on the manifold install. Went easier than the elbow install. I did the grease thing and also used a magnet strip to remove all the shavings that the grease didn't get which wasn't much.



At WOT I'm running 700* and change. Cruising at 70mph I'm running 500*. 100* more pre turbo than post turbo, that's what my gauge reads. Keep in mind that I'm not running any type of box or big flow injectors, I'm stock except for air filter and 4" catback.



100* difference is that about right?

 

[Hohn]

Stop right there... .



The 100° difference you are seeing is about right for those circumstances.



I have my pyro post-turbo, and I may move it. But, the difference between the two readings is not as great as people assume under constant states.



The problem is that the variance in post- and pre- reading is that is is NOT constant.



At the limits, you might have 275° of difference. At cruising, you might have only 100° difference or less. At idle, it will be even less.



The thing is that that higher the temp is, the faster that heat will bleed off. The temp difference between the hot part and the cold part affects the rate of energy transfer between them.



What I am saying is that the difference between pre- and post is greater the higher the temp goes.



I might move my probe to pre-, just because it responds faster, not necessarily much more accurately.



HOHN