de catting up pipe
26 August 2006, 11:06 AM
#1
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de catting up pipe
might sound like a stupid question
but when you de cat the up pipe what happens to the sensor? i have just been informed(subaru fitter) that if you put it back in an un catted pipe it will melt and possibly break up.
anyone shed any light on this?
cheers
Lee
but when you de cat the up pipe what happens to the sensor? i have just been informed(subaru fitter) that if you put it back in an un catted pipe it will melt and possibly break up.anyone shed any light on this?
cheers
Lee
27 August 2006, 01:04 PM
#3
It's the EGT sensor in the up-pipe. It's possible that it can break and lunch the turbo and that's why some people remove it and fit a CEL fix and blank off the hole (search for EGT CEL fix)......most peoples preferred option 
Mine died some time ago and I have decided to remove the OEM one and fit an aftermarket jobbie. Other people have run high power (ninnybobs) for a considerable time with no EGT issues using the standard EGT sensor.
All personal choice really
Shaun
Mine died some time ago and I have decided to remove the OEM one and fit an aftermarket jobbie. Other people have run high power (ninnybobs) for a considerable time with no EGT issues using the standard EGT sensor.
All personal choice really
Shaun
27 August 2006, 04:02 PM
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Cheers Shaun, again
. would the car still run ok if i didnt re fit the sensor, and didnt fit a cel fix. would powerstation just map the light out? didn't think there was so much to think about.
Lee
. would the car still run ok if i didnt re fit the sensor, and didnt fit a cel fix. would powerstation just map the light out? didn't think there was so much to think about. Lee
27 August 2006, 09:08 PM
#5
Lee
Why they fit an EGT sensor to the Bugeye WRX beats me ! The STi doesn't have one and it's not really needed. The car with run fine without an EGT sensor as the ECU doesn't do anything about the input apart from to throw a CEL if it's not there or not working !!
Unfortunately the EGT CEL can't be EcuTeK mapped out
To keep the CEL away you have to have the OEM sensor in place or fit a 2K ohm resisitor between the terminals where the sensor plugs into the wiring loom at the top left hand engine bay near the boost solenoid !!
As mentioned it's all down to personal choice,
If you are running the original TD04 turbo then I doubt at the 265 - 280 BHP output the OEM EGT sensor will be troubled so it would be easier to keep it in situ as it's unlikely to fail.
Otherwise it's blanking off the hole in the up pipe and fitting the resistor !!
Shaun
PS if you are wondering why I'm having an EGT sensor fitted it's because I'm going for a touch of Methanol injection......methanol contains more oxygen that ambient air so the fuel burns at a higher temp....more power but there is a chance of melting the pistons !!
Why they fit an EGT sensor to the Bugeye WRX beats me ! The STi doesn't have one and it's not really needed. The car with run fine without an EGT sensor as the ECU doesn't do anything about the input apart from to throw a CEL if it's not there or not working !!
Unfortunately the EGT CEL can't be EcuTeK mapped out
To keep the CEL away you have to have the OEM sensor in place or fit a 2K ohm resisitor between the terminals where the sensor plugs into the wiring loom at the top left hand engine bay near the boost solenoid !!
As mentioned it's all down to personal choice,
If you are running the original TD04 turbo then I doubt at the 265 - 280 BHP output the OEM EGT sensor will be troubled so it would be easier to keep it in situ as it's unlikely to fail.
Otherwise it's blanking off the hole in the up pipe and fitting the resistor !!
Shaun
PS if you are wondering why I'm having an EGT sensor fitted it's because I'm going for a touch of Methanol injection......methanol contains more oxygen that ambient air so the fuel burns at a higher temp....more power but there is a chance of melting the pistons !!
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28 August 2006, 02:04 PM
#8
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Melt, who told you that.
There is no change to the EGT.
The only reason it may break up is because in most cases the sensor is old and already weak, if it's a concern just change for a new one.
Rob
There is no change to the EGT.
The only reason it may break up is because in most cases the sensor is old and already weak, if it's a concern just change for a new one.
Rob
28 August 2006, 03:29 PM
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Originally Posted by scoobfan
Melt, who told you that.
There is no change to the EGT.
The only reason it may break up is because in most cases the sensor is old and already weak, if it's a concern just change for a new one.
Rob
There is no change to the EGT.
The only reason it may break up is because in most cases the sensor is old and already weak, if it's a concern just change for a new one.
Rob
, reckons with no protection it could melt/break up and destroy the turbo.Lee
28 August 2006, 03:45 PM
#10
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Originally Posted by codie247
"Subaru Technician" told me , reckons with no protection it could melt/break up and destroy the turbo.
Lee
, reckons with no protection it could melt/break up and destroy the turbo.Lee
Rob
28 August 2006, 03:53 PM
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Subaru reckons the cat gubbins protects the sensor from heat/flames, and without this protection the sensor could break up/melt, his words not mine.
Lee
Lee
28 August 2006, 04:22 PM
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So the sensor is after the cat and not before it, is that right.
Even so, as for the heat, the hottest part of the exhaust is the cat, so surely that would reduce the temps.
Sorry to go on !!
Rob
Even so, as for the heat, the hottest part of the exhaust is the cat, so surely that would reduce the temps.
Sorry to go on !!
Rob
Last edited by scoobfan; 28 August 2006 at 04:24 PM.
28 August 2006, 10:58 PM
#14
Lee
2.5" for the exhaust will be fine
As mentioned, running the OEM EGT sensor is OK for the TD04.
Gussy broke his EGT sensor into bits runing 330 odd BHP and I have Killed a couple with my 350 plus BHP Bugeye
Most bigger power Newage WRX people ditch the OEM sensor.
Cheers
Shaun
2.5" for the exhaust will be fine
As mentioned, running the OEM EGT sensor is OK for the TD04.
Gussy broke his EGT sensor into bits runing 330 odd BHP and I have Killed a couple with my 350 plus BHP Bugeye
Most bigger power Newage WRX people ditch the OEM sensor.
Cheers
Shaun
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