i built my downpipe and am going to finish up my exhaust and was wondering where the best placement for it?

thanks in advance
Dann-

ps i put this in tech but no one answered

 

mine is like 5 inch back from the turbo

 

thanks for the info

anyone else got different opion?

bump

 

i always put 2 bungs in my downpipe for widebands.....one about 5 inches or so from the turbo and one right after the oil pan....about the stock location. sometimes its much easier to just do a quick reading near the turbo with out having to jack the car up (using a dynojet o2 sensor, not something that stays in the car)

ive noticed that the closer to the turbo, the quicker the sensors wear out. im done using dyno jet o2 sensors.....ive switched to inovate for dyno use.

 

would it affect the accuracy of the af ratio reading if you put it say little past the oil pan as compared to right after the turbo?

 

there apears to be a very slight difference.....however it is less of a difference than comparing 2 differnt gauges together.

you would be amazed how much of a difference there is between gauge manufacturers.

 

In the AEM UEGO install manual, it says that turbo cars or cars holding high rpms for sustained periords with high EGTs should keep the sensor 36 inches away, and n/a cars is 18 or more inches.

AEM uses the bosch sensors that alot of others use, so it should apply to all of them.

 

PLX m300 says 24" after the turbo. So thats where mine is.

 

Motec recommends within 0.5 meters (so ~20 inches) of the collector on an NA motor, and the same but from the turbo on an FI setup. On our SFWD cars running integrated EMS widebands, they're usually no farther than 6 inches from the turbo. Just my $0.02 though...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-charged &raquo;</TD></TR><TR><TD CLASS="quote">you would be amazed how much of a difference there is between gauge manufacturers.</TD></TR></TABLE>

You got that right. In my experience, the dynojet sensor reads .7-1.0:1 LEANER than the innovate, zeitronix, and some of the EMS integrated widebands. Since us old schoolers are used to seeing the dynojet readout, it's easy to differentiate between the 2.

I have seen slight TIME delays based on where the sensor is located. On 600hp cars, 3 feet downstream of the turbine exit can easily translate into a 3-400rpm delay, simply because the motor is able to go through the rpm band more quickly. On a 250hp car, the difference is negligible.

 

well i have a plx so i guess they recommend 20'' but i guess this is a hit or miss type deal.

has anyone ever done a test on the different locations?

 

PLX calls for 24" got the damn instructions right here in front of me...

 

sounds cool

 

who is running race gas with a wideband? I was reading and it said not to run race gas because it burns up the sensor? any truth to this?

 

does plx state 24'' on NA allone or is it for either turbo or NA?

yea will using 103 hurt this sensor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bottle fed &raquo;</TD></TR><TR><TD CLASS="quote">who is running race gas with a wideband? I was reading and it said not to run race gas because it burns up the sensor? any truth to this?</TD></TR></TABLE>
All of our cars running EMSs with integrated widebands run strictly on leaded race gas (that is on the street and at the track). If you're talking unleaded pump gas (lower octane) and unleaded race gas, I highly doubt you'll see any drastic differences in life expectancy. What are you are probably refering to is the differences in leaded gas as apose to unleaded. It is said that the life of a wideband is decreased to 1/10th of its expected when leaded gases are passed over it. The unleaded average is supposed to be around 500 hours...