best egt spot?

[cyrez187]

where is the best spot to put your egt at?i see most guys put it on the exhaust manifold on the 4th cylinder, or does it make a big difference if u put it on your downpipe? thanks

[DGajre777]

Depends on who you ask. One set of people put it in the runner on the exhaust manifold. The other set of people put it in the downpipe. If it is in the exhaust manifold and something breaks, the turbine on the turbo is going to be toast. If this is for your N/T put it on the exhaust manifold.

[dr1665]

#4 runner before the turbo. Do it right and install a proper bung for it.

[92awddsm]

I myself would install it right after the turbo in the dp or o2 housing. I have 2 reasons for my preference.
1) The turbo will live a long healthy life even if the probe decides to come apart.
2) In the ex manifold, it isnt too unusual to see 1600* egt in some applications. With it in the dp, the temp will be a little lower and you end up with a temp reading that that is actually useable. Most egt gauges only go to 1600* so how could you really see a change or problem if the gauge is already maxxed out before the problem arises? Its not a tuning device, just a monitoring device.

[selmerguy]

Originally Posted by 92awddsm

I myself would install it right after the turbo in the dp or o2 housing. I have 2 reasons for my preference.
1) The turbo will live a long healthy life even if the probe decides to come apart.
2) In the ex manifold, it isnt too unusual to see 1600* egt in some applications. With it in the dp, the temp will be a little lower and you end up with a temp reading that that is actually useable. Most egt gauges only go to 1600* so how could you really see a change or problem if the gauge is already maxxed out before the problem arises? Its not a tuning device, just a monitoring device.

i think you tap the runner because if it's good there it should be good everywhere else. i have never seen egts higher that 1550 in mine. i drive the poop out of my car too.

[98eclipseRS]

Originally Posted by selmerguy

i think you tap the runner because if it's good there it should be good everywhere else. i have never seen egts higher that 1550 in mine. i drive the poop out of my car too.

Being good in a place and being the best place for it are too different things. I have to agree with 92awddsm for the shear fact that if the probe does decide to break you are not out a probe and turbo, only a probe.

[oldman]

The reason most tap the #1 cylinder exhaust runner is because the #1 cylinder, being the furthest from fuel feed on the fuel rail, is the cylinder most likely and the first to go lean.

[92awddsm]

Originally Posted by selmerguy

i think you tap the runner because if it's good there it should be good everywhere else. i have never seen egts higher that 1550 in mine. i drive the poop out of my car too.

Thats why I stated "in some applications", not all. Ive been through the down side of mounting it in the manifold. A new probe is $100. A new turbo and probe for me would cost $1000, 10 times as much as what it would cost to replace a probe. First time you lose the probe, you would probably change your setup also and then swear by it.

[oldman]

Nevermind my previous post, I keep forgeting that I'm in the nt forum.

[XMasta19]

420a guys tap the #4 runner


EDIT: darn the dirty diaper...I would have got ya before you posted

[cs82685]

i'd say number 4 runner even though its gonna screw up your turbo if it breaks because at least you get accurate temperatures. Most people say not to take the EGT's past 1550-1600* anyways. Also the lower temperatures from having it in the downpipe kind of result in having to figure out what too high of a temperature is, its almost like you have to convert whatever reading you get in the dp and estimate what temperature there is equal to 1600* before the turbo. Someone also mentioned having a broader range of temperatures because your highest readings would be more towards the middle of the gauge if you place it in the downpipe, but once again nobody recommends letting your EGT's go over 1600 so its not like you need more room on the gauge.

haha bruce surfin the nt forum, and no longer just a wiseman, now you've got full mod authority, get the car together yet?

[wookieneck]

The instructions with mine say 3 inches past the outlet on the turbo. I had it in the header before prior to the start of the turbo project so now im sitting with a bung in my hand wondering manifold or DP.
You guys seem to be 50/50 and the manufacture says DP, anyone else running the autometer probe?

[cs82685]

the temperature difference after the turbo is huge. So you can put it on the manifold and get much more accurate temperatures and risk breaking your turbo if the probe breaks, or you can put it after the turbo save your turbo in case the probe breaks but possibly melt some pistons because there's much more guessing at actual temperatures inside the engine. It's your choice which you'd rather risk having to replace. I'd say put it in the manifold though.

[wookieneck]

Ive no preference either way, im just wondering why the manufacture said to put it after the turbo.
The guy I bought the kit from said to put it in the turbo housing just on the other side of the manifold flange. Putting a stainless bung in that cast housing would be a trick though.

Seems like most guys are going with the manifold, which is fine with me so long as I can put it on the bottom where you wont be able to see my crappy welding.

I think I will put it right under the wastegate that I cant use because its too tall for me to close the friggin hood.

[Talon ESI-T]

Actually I agree with OldMan. Cylinder 1 is my location as well and is furthest from the fuel feed which can be the leanest. All the info i have searched on the net supports this.

OldMan, dont froget even though we are non-turbo the cylinder #1 is still the furthest from our feed.

[XMasta19]

ohh...he speaks