Drilling a hole for EGT.

[92TealSupra]

hmm

let me copy what I posted in another thread....



Guess where your statement falls into

What happens with the "I heard", " so and so" etc is that it is usually never ever true. So what you heard, is not true.
Or asked another way. What makes cylinder #6 hotter than the rest? You are already creating about 800f worth combustion temps on all 6 cylinders.

Iv' learned!

 

[ForcedTorque]

What about between the downpipe and the turbo?

In the gasket????????????????

I'm reading the thread for education. I can't believe there was no response to that.

 

[jimi87-t]

Haha, I think he meant in the elbow.
But yeah, isnms already showed how I did it. Anything other than pre-turbo is pointless...

 

[crisp]

I have had an HKS EGT for over ten years. It is installed in the elbow, where suggested in the instructions or by a tech at HKS. (Forget which, but I followed the recommendations.) The absolute temp reading is not NEARLY as important as the relative DELTA (temp shift/creep/change/stability, etc... you choose) as you explore varying conditions during tuning, as a measure of mods, or simply as feedback while making a pull/cruise/idle/etc... It's all about FEEDBACK.

Cause and effect. You can mount it in a number of locations, but the key is to understand that it is allowing your motor to TALK TO YOU...

In my opinion, if it SPIKES, you either have a breakdown in some sub-system or mechanical part of your motor, or have not established a progressive tune that has been carefully monitored as you dialed-in your tune.


My EGT is near the o2 sensor, and I can see the difference by just changing fuels. It responds well enough for me to see the change from gentle to more pronounced throttle... and as I sweep through the rpm band. It shows me information that is stable and responsive under load at varying boost settings... and when I vary my HKS VPC, EVC, or GCC controls, I can see the meter's behavior change.


I'm no expert on EGT methodology, and I have no technical training or other basis for my claims. I haven't read or heard much about it, as I'm still a relative "noob" in these forums... and I spent the first dozen plus years with my supra with no outside input on it... but having had this car 14 years, and watched the behavior of my EGT on every driving moment of well over 50k of those miles... I'm pretty sure it is giving me some visual data of engine conditions that are of purpose and value in my experience.




-crisp

 

[artorush]

In the gasket????????????????

I'm reading the thread for education. I can't believe there was no response to that.

I don't speak English as first language so It's hard for me to explain. But this picture below shows what I mean. Any thoughts on this location???

Second picture is not mine, it's just for illustrious purpose. I wish I could drill It pre-turbine but I have no possibility to remove the turbine, so I must chose a second "best" location.

 

[dbsupra90]

I don't speak English as first language so It's hard for me to explain. But this picture below shows what I mean. Any thoughts on this location???

Second picture is not mine, it's just for illustrious purpose. I wish I could drill It pre-turbine but I have no possibility to remove the turbine, so I must chose a second "best" location.

dont drill there. that would be the same as drilling/tapping into the downpipe. drilling and welding/threading a bung onto the downpipe (next to 02 sensor) would be much easier and accomplish the same thing instead of drilling into thick cast iron.

The absolute temp reading is not NEARLY as important as the relative DELTA (temp shift/creep/change/stability, etc... you choose) as you explore varying conditions during tuning, as a measure of mods, or simply as feedback while making a pull/cruise/idle/etc... It's all about FEEDBACK.

agreed!

 

[IJ.]

I run mine in the Downpipe just off the Turbine wheel, you see around an 80>100c temp drop compared to pre turbo BUT you don't run the risk of the probe failing and taking out the Turbine wheel.

 

[92TealSupra]

I run mine in the Downpipe just off the Turbine wheel, you see around an 80>100c temp drop compared to pre turbo BUT you don't run the risk of the probe failing and taking out the Turbine wheel.

I ran mine is the same area.

 

[crisp]

I run mine in the Downpipe just off the Turbine wheel, you see around an 80>100c temp drop compared to pre turbo BUT you don't run the risk of the probe failing and taking out the Turbine wheel.

Ditto for same reason, not that I recall the chat with HKS tech when I first put it in... and same deg. drop, but it's all relative.


-crisp

 

[92TealSupra]

I would never drill into the turbo. keep in mind the turbo is watercooled so you could hit a water channel, oil channel or just fuck up the turbo. To get the most accurate reading you would prolly want to be in front of the turbo, but drilling in cast iron doesnt sound fun, especially considering it could cause cracks in the manifold. I would put it on the elbow after the turbo near the 02 sensor, in fact many aftermarket turbo elbows come with an extra bung already installed.
Good luck!

The exhaust side has no water channel, it's only the center cartridge to keep the bearings at a good temp, and the oil is for that and lubrication.

 

[artorush]

I was finally able to mount the egt sensor. Took some time but it went well till the end. Exhaust side of the turbo was mine second best choice because I was not able to remove the turbo. There was absolute no problem drilling a hole through the thick cast iron, it was very easy.

The sensor did not interfere with the heat shield or anything else. It Fit perfect. I should of have drilled it a little closer to the turbine, It was too close to the gasket and the downpipe. But it eventually worked. To seal the NPT thread I used exhaust lubber seal.

I took some picture of it:

 

[dbsupra90]

glad it went well. nice alpine too.

 

[artorush]

glad it went well. nice alpine too.

Thanks , and I also have 6 Focal speakers and 1 Focal amplifier and 1 ground zero 10 inch bass. It plays great