hey its me again, 86 6.9...

whats a safe egt value, shell be running empty 99.9% of the time. i turned up the pump.. maybe 3 flats maybe a tad more. wont hessitate to turn down. but she gets up to about 900ish. not too much more.

 

I do believe it depends on pyro location.


But 0-1000 is the safe area. If your pulling heavy or whatever, you can go up to 1200 but try not to keep it at that for to long.

 

the sensor is at the Y pipe

 

Is it right behind Cylinder #8?

 

where the two exuast manifold pipes come and connect into one. on the right side of the truck.under the firewall.about 2-3ft away from the engine

 

Oh that's a little far.... and if your seing 900 there... ouch.


The limit I told you is the limit if the pyro was located just a couple inchs after cylinder #8, on the manifold.

 

ooooh ****.. okey so i should throw her in a few from cyl 8? is that the hottest? ill just wield up the hole?

 

My probe is right where John is talking about and my pump is also turned up at least 3 flats. I can hit 1000 pretty easy if I get on it good. I was pulling a trailer loaded with 4 wheelers and tree stands up a long fairly steep hill the other day and hit 1300 for a minute or less when I wasn't paying attention. I switched the Optishift to manual and dropped it down to 3rd gear and the EGT came down quickly.

 

Yeah..... if you were hitting 900 3ft. away from the engine, umm ouch. That's pretty severe.

 

i planned on turning her down, i will relocate probe and turn down a flat. thank youu!!

 

just curious if anyone has had numbers from pre turbo and post turbo is the difference about 300 less?

 

I can tell u this. My truck came with an ATS 088 turbo and the pyro was located post turbo but just barely. The system either came with the bung there (it's almost like it's in the turbo housing) or someone put it there but it looks factory. Anyway my sender died and I couldn't get it out to save my life so I tapped a new sender hole into the pass side manifold, right in the middle of the 4 cylinders (had the best access there). Drove some familiar hills and the temp was the same in the manifold as it was in the previous location. I used to worry that I was losing a couple hundred degrees where it used to be... apparently not.

 

There was a thread over in the OBS stroke forum where a member got a different truck that had the pyro sensor located in the down pipe after the turbo. He wanted it pre turbo so added a new one, and ran them both for a test. Depending on how he drove he found 300 degrees difference between the two very easily. IIRR he even found 500 degrees difference when pulling a heavy load on a decent hill.

 

so i put it in the manifold behind #8 or on the pipe the manifold connects to?

 

In the manifold at #8 is what is generally recomended.