exhaust mani. off wide band or EGT gauge? - Mitsubishi Evolution Forums: Mitsubishi Lancer Forum
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Tuning & Engine Management Engine Management, EGT temps, timing, wideband, datalogging, fuel trims, etc.

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Old 02-04-2008, 04:55 PM   #1 (permalink)
 
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exhaust mani. off wide band or EGT gauge?

im ditching the cracked megan exh. manifold and getting a ported and coated oem. Would a wide band gauge or EGT gauge be useful to me. Just wondering because the manifold will be off and easy to drill and tap.
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Old 02-04-2008, 06:47 PM   #2 (permalink)
 
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Wideband.
I how ever am not sure if it goes in the exhaust mani it self. But wideband
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Old 02-04-2008, 07:33 PM   #3 (permalink)
 
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The Wideband is used to determine how much oyxgen is left in the gas after it exits the engine. This sensor goes into your exhaust right below your downpipe.

The EGT Exhaust gas Temp measures your exhaust gas temp as it exits the engine. The header is were you would want to locate your EGT sensor.

If you want to tune your car the wideband would be more useful. The EGT sensor would be an additonal tool for tuning and viewing the temp of the exit heat all the time. IMO
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Old 02-04-2008, 09:41 PM   #4 (permalink)
 
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ok that helps. I was just mainly wondering if it would be worth it to out in the EGT gauge since i am going to be taking the manifold off anyway. What is the benefit of a EGT ?
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Old 02-04-2008, 10:38 PM   #5 (permalink)
 
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Just another tool for tuning and viewing the temps of your engine for safety.
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Old 02-05-2008, 01:08 AM   #6 (permalink)
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The more info, the better. EGT's will rise if the ECU has to retard timing. It will let you know when things go south really quick;
"When the timing is retarded, the ignition process happens so late that the flame front shoots out the exhaust port when the exhaust valve opens and blows still expanding, really hot gas directly onto the EGT probe. So internally the pistons are barely warm, but the exhaust manifold and turbo get real hot. This is the reason we recommend not running EGTs higher than 900 degrees C. That is the point that timing retard is usually driving the EGTs up. Not that immediate damage is being done, it is just that you are no longer making additional power above that temperature and there is no benefit to running there. "
From High EGTs and Knock
Apexi Super AFC For The Eclipse/EVO
The wideband sensor will get cooked if placed in the manifold. It's best in the downpipe like tobz said.



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