my first o2 sensor bung on my header is on only one tube of the four and not after,where the four meet.

Tell me this is ok??? crap

DRew

 

did it come like that? it should be after the 4-1 junction....

 

Assuming its either the RPW or HVE header...?

They're first 02 sensor is on one of the runners, and both the people I know who've run the header have had no problems with it. I might actually be better because I believe its on either cyl 2 or 3 which tend to be the ones that run lean anyways...

 

no their pacemaker...the ones the bepormax guy was selling on hp

[ April 23, 2003, 10:30 PM: Message edited by: PrOjEcT BLuE 02 ]

 

The O2 sensor will read just fine being stuck in one of the primaries. You actually want the first O2 sensor pretty close to the head, closer than the header collector would be.

O2 sensors read air/fuel ratio by way of gasses in the exhaust stream. Those gasses come out of EVERY cylinder. If your engine is working correctly, each cylinder should run the same mixture (A/F ratio) which means each one will put out the same readings for O2.

If your engine ISN'T working right and one cylinder is going lean, the O2 sensor being in your collector isn't going to help much because it will get signal from ALL the cylinders combined. You don't solve any problems by moving it...

 

Since we're on the topic of O2 sensors. Stock 02's suck. Does anyone know of any after market O2 that will give a better more accurate reading.

 

Not without converting over to a special Wide Band o2 sensor (UGEO). They run between $200 and $500 per o2 sensor, and require special gauges to read them, as then run 1V to 5V vs the .1V to .9V of a standard o2 sensor. The Wideband O2 sensors don't live very long, and require you to remove them from the exhaust stream every 500 hours to let them "recalibrate" themselves.

In short, use a wide band o2 sensor at a shop, on a dyno for tuning, and use your stock o2 sensor for a "pretty" but marginially functional A/F gauge.

 

Thanks, wish i'd known this before I bought the a/f gauge. Would have opted for an EGT gauge, but I guess there's no harm in having both.

 

ebay your AF gauge and use the funds to buy an EGT sensor/gauge package. It won't pay for it all, but it will help.