flashmntbiker

So currently my wastegate is venting to the air, and does not return to my exhaust. If I'm trying to tune with a Wideband O2 (Just bought and Innovate LC-1) will this mess up my readings? Do I need to get my wastegate plumbed into my exhaust (something I've been planning on doing, just been too cheap to do it)?

brettsb16a2

I have been driving for two years with your exact set up with a daily driver. I have never had a problem. I have been tuning between 11.8 and 12.3 afr in boost pass 3psi on a stock b16a2 up to 7.2psi currently. My goal is to keep it around 12 afr in boost. As soon as i get a clutch i will boost to 9psi. My waste gate blows off right under the hood. I use 3 methods of street tuning, don't just rely on the wideband. I use the wideband, det cans, and i pull my spark plugs and read them. The plugs never lie! You will be able to tune pretty acurately with the wideband and a wastegate A-out but i know what you are saying.

glht_omni

Keep it venting to atmosphere, they sound nice and nasty like that.
Almost everyone I know vents to atmosphere and I'm talking guys running 25-39psi of boost and running 9s - 11s!

janus

@brettsb16a2, care to explain what you are referring to as 'det cans'? tia!

brettsb16a2

you can find it!

Mr Peepers

Readings will not be affected since the only time the wastegate is open the exhaust gases are leaving it in a hurry. The only way it could affect readings is if outside air made its way into the exhaust and past the o2 sensor indicating a false lean condition. Something like an exhaust leak can however cause inaccurate o2 readings since exhaust comes out as a pulse. Air can get sucked in between these pulses and be read by the o2 sensor, again being false lean. This is more apparent during idle and part throttle.