exhaust temp guage

[Preludekid]

in order to tune my ECU, I will need to have A/F guage and a exhaust temp guage.

Does anyone know how to install the exhaust temp guage?
Do we have a factory sensor already installed and just tap the wire?

[kaioshin]

Originally posted by Preludkid
in order to tune my ECU, I will need to have A/F guage and a exhaust temp guage.

Does anyone know how to install the exhaust temp guage?
Do we have a factory sensor already installed and just tap the wire?
If you are using the PFC, then you can use the second O2 sensor bung for wide band O2. And you don't want to use the stock sensors as their range is smaller and they won't pick up on changes as quick as a wide band sensor will.

[Smaay]

you dont need an EGT to tune the Power Fc. Just the wideband O2...

[sentientpc]

Originally posted by kaioshin
If you are using the PFC, then you can use the second O2 sensor bung for wide band O2. And you don't want to use the stock sensors as their range is smaller and they won't pick up on changes as quick as a wide band sensor will.

Second O2 sensor bung??? I hope your refering to the one BEFORE the cat (if you have a cat). The cat will modify the O2 signals by burning the remaining fuel, thats what it does.

[Preludekid]

if i insist to put a EGT, is there any easier way to do so?
Instead of drilling a hole into the exhaust mainfold.

[sentientpc]

I would just put in another bung before the cat. I guess it depends on how exact you need the measurements to be. If your looking to see any kind of tempature deltas then you can do it after the manafold.

[cool2miketlu]

EGT you should put on the manifold on the hottest cylinder pipe. That is the best location and most accurate readings.
Tuning must be done on the Wideband O2, you can use the EGT but it will not give you the accurate readings like wideband O2.
If you have straight pipe or hollowed out cat you can put it on the 2nd O2 sensor bung.

[Smaay]

Think about this for a second...when you go to a dyno shop where do they put the sniffer...right up your tail pipe, after all the CAT's and resonators and mufflers....right?....exactly....and i said above thats the easiest and quickest way to hook it of...of course you want the truest reading then drill and weld the bung as high up on the down pipe you can go...

[143hawaii]

drill, tap, rinse, lather and repeat :)

[Preludekid]

thanks guys.

[BrianGTS]

Originally posted by sentientpc
The cat will modify the O2 signals by burning the remaining fuel, thats what it does.

Since when does a cat ignite fuel?

[sentientpc]

From howstuffworks.com:

"A catalytic converter is a device that uses a catalyst to convert three harmful compounds in car exhaust into harmless compounds.

The three harmful compounds are:

Hydrocarbons (in the form of unburned gasoline)
Carbon monoxide (formed by the combustion of gasoline)
Nitrogen oxides (created when the heat in the engine forces nitrogen in the air to combine with oxygen)

In a catalytic converter, the catalyst (in the form of platinum and palladium) is coated onto a ceramic honeycomb or ceramic beads that are housed in a muffler-like package attached to the exhaust pipe. The catalyst helps to convert carbon monoxide into carbon dioxide. It converts the hydrocarbons into carbon dioxide and water. It also converts the nitrogen oxides back into nitrogen and oxygen."

How do you think it converts the hydrocarbons into carbon dioxide? It doesn