awesome i am doing my camshaft right now, been doing it few hours everyday for the last 7 days. hopefully i will be up and running later today.. interested to see what kind of a/f i will get from the new cams.

 

Good luck with that, keeps us updated!

 

so i f i am using a utec i can just replace the stock o2 sensor with the new wideband one and get accurate readings? thanks

 

The entire a/f ratio became more rich after the cam install. from 2500rpm onwards, it never went over 12.5:1 and went as rich as 10.8:1 up top. I don't seem to feel much gain from the cams either, hopefully it will get better after the tune

 

I'd replace the wideband O2's in pairs if you're going to do that. Otherwise, they won't be properly matched and your Bank 1 & 2 AFRs will be off... If you're only installing the UTEC (Bosch or VW) wideband, I'd put it just behind one of the factory O2's... That way you can monitor/ log your AFRs without adversely affecting the tune directly. I did that on the Driver's side (Bank 2) in my case.

 

The rear two O2 sensors are only there to monitor the effictiveness of the cats. If the cats are removed, the O2 sensors are worthless. You can get a device that will trick the ECU in to thinking that the O2s are there, when they really arn't, then you can use the stock bungs for aftermarket O2s.

If you want to retain your O2s and you want to switch between banks to check out the difference you can swap the aftermarket wideband with the OEM narrowband and get readings that way (you will end up with two OEM sensors in the drivers bank and the aftermarket in the passenger bank). If you are trying to compare one bank directly to the other I would recomend using the sensor and guage. Log one side, jack the car up, swap the sensor, then log the other side under similar driving conditions. There will be a bit of difference from O2 to O2 and from guage to guage.

 

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