EGT Temps?

[BuGS]

What are good EGT Temps? I don't have a wideband and the closest dyno is 3 hrs over a MTN pass so I want to tune my car as good as I can. Also this is for the Probe being right behind the Turbo.

[elscotto80]

Mine is about 6 inches from the DP, maybe a bit more. When cruising in 5th it varies from 900-1200, at idle it can go as low as 400, but as high as 600. When I get on it through 3 gears, it gets as high as 1250 or <.

[Kreator]

Mine is about 6 inches from the DP, maybe a bit more. When cruising in 5th it varies from 900-1200, at idle it can go as low as 400, but as high as 600. When I get on it through 3 gears, it gets as high as 1250 or <.

hmmm.... mine sits 2-3 inches down from the turbo and i can barely push it into the 800F zone :-/ guess ima running r$$$ch!

[elscotto80]

Odd, I have the GTX injectors and GTX ecu.

[Kreator]

Odd, I have the GTX injectors and GTX ecu.

rx7 injectors, stock ecu + safc. im tuned to run a bit rich

on hte other hand, my car ran 1200F when beaten on N/A. If you are getting those temps in the dp after the turbo, maybe you should get on a dyno to check a/f ratios.... not doubting the ecu or anything, but remember people saying temps in dp are about 300F less then manifold. Which means you have 1500F after the engine :-/ a bit high

[95ProLeila]

aren't you supposed to tap the header?

[Kreator]

aren't you supposed to tap the header?

you are.... but with cast iron or stainless steel its somewhat inconvenient when you dont have proper tools. So it's much easier to tap the downpipe.

[95ProLeila]

you are.... but with cast iron or stainless steel its somewhat inconvenient when you dont have proper tools. So it's much easier to tap the downpipe.

ah, i see. there was some discussion about this over on the wrx board, and the general consensus was that the absolute best way to do it was to have a 4 channel egt with dedicated probes for each cylinder. but that also gets expensive, the cheaper way they decided was to tap the header on the lean cylinder (#3 for them iirc), that way they'd see worst-case scenario numbers.

[McCorkle]

hmmm.... mine sits 2-3 inches down from the turbo and i can barely push it into the 800F zone :-/ guess ima running r$$$ch!

This same thing happened on my car. The manifold was tapped for a Greddy EGT but I was running an Autometer probe. Turned out the probe wasn't getting in the manifold deep enough and thus not getting hot enough to read properly. I was running lean at the time so they needle should have been hitting about 1400 degrees.

[atomicEGT]

you are.... but with cast iron or stainless steel its somewhat inconvenient when you dont have proper tools. So it's much easier to tap the downpipe.

proper tools being something other than several drill bits, a pipe thread tap, and motor oil?

[95ProLeila]

well, as I understand it, it's not as simple as you would think. due to the fact that if done improperly, you will end up with metal shavings in your turbo.

[Kreator]

proper tools being something other than several drill bits, a pipe thread tap, and motor oil?

cast manifolds rarely have a good enough spot to tap. Reason is, the egt probe is pretty long - about 2.5 inches - mine sits almost across the whole dp piece and its offsetted by a bung. it's hard to find a runner that big in diameter and cast manifolds rarely have a collector.

ss manifolds have collector, but they are too thin to tap and require a bung - which is hard to weld if you don't have a decent welder. you could obviously take it to shop, but i dunnow... i felt lazy and didn't want to **** up the manifold.

[atomicEGT]

hm... my egt probe is pretty small, i think under an inch. guess it depends on the brand.

[Kreator]

hm... my egt probe is pretty small, i think under an inch. guess it depends on the brand.

could be. mine is isspro. what brand is yours?

[BuGS]

I was just scared of the probe breaking off and ruining my hybrid. The murphy's law is like my life slougan...