Simple Wideband O2 Location

What is it like running methane? way more power? I bought parts from a fellow ls addict in tucson who rebuilt a 6.0 iron block, ls3 heads, and was running methane. Was in a gto body.

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Curious, do many people just remove a factory O2 sensor and put in the wideband? I need to crawl under my truck and see if it will fit. I'll be running open loop anyways (without O2 feedback) when I tune.

Matthew Jeschke said:

That's what I see some people doing. Curious how far off the tune would be if I just put it further back in the exhaust where it's already wired up for a sensor.

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If the cats are working, installing after the cats will effect the reading. Some hydrocarbons and oxygen will enter the cat, and hopefully carbon dioxide and water vapor will leave the cat, O2 readings should be higher precat vs post

Matthew Jeschke said:

What is it like running methane? way more power? I bought parts from a fellow ls addict in tucson who rebuilt a 6.0 iron block, ls3 heads, and was running methane. Was in a gto body.

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its methanol. its mainly for boosted set ups, it cools the intake air charge making the air denser, and raising the octane rating of your fuel, if your running 93 octane gas and spraying meth your octane is now almost 105, the cooling and the extra octane let you run more boost psi and more timing. if you cant get e85, its the next best thing.

only bad part is you need to lean out the fueling in the tune, then spray the meth, the meth adds to your afr, so it makes up for the leaned out tune, but should the injector clog or the pump quit, your now lean, why i like to have the wb full time when running meth.

used to buy 5 gallons at a time, bout 30-35 a can, then mix 50 blend with distilled water, makes 10 gallons. used to last me a year in my regal.

you can run this stuff straight in your gas tank, but need huge injectors and and real fuel pump that can put out the extra volume you need. not worth it for daily driving.

Dang that is bad ass.

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Matthew Jeschke said:

Curious, do many people just remove a factory O2 sensor and put in the wideband? I need to crawl under my truck and see if it will fit. I'll be running open loop anyways (without O2 feedback) when I tune.

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The factory PCM needs the narrow band to control fueling. The wide band signal is different. There are some wide band setups that send a simulated narrow band signal to the PCM. When I used them a few years back in my SC vette, they weren't that reliable and occasionally would 'hang' which isn't good when your injectors adjust fueling relative to what the O2s are reporting.

muncie21 said:

The factory PCM needs the narrow band to control fueling. The wide band signal is different. There are some wide band setups that send a simulated narrow band signal to the PCM. When I used them a few years back in my SC vette, they weren't that reliable and occasionally would 'hang' which isn't good when your injectors adjust fueling relative to what the O2s are reporting.

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Yeah but I think you turn off the O2 sensors / tell computer to ignore them when collecting data for the tune?

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Thanks everybody for the help! I finally got to the point of running cable for the wideband. I fished it through the factory cable gland (hole in firewall). Royal PITA. Note to self, cut a second cable gland for aftermarket stuff next time. Couple questions...

Where did you guys tap power? I thought maybe I'd use the driver side dash fuse block and do one of those double tap fuses for now... But I always like slick ways to do things that look a bit more "natural or factory".

Any thoughts on cable management? I have a bit of a mess under my hood. For time being it's all zip tiedied up. My goal is to clean the cable management up and bring everything along backside of transmission bellhousing. Any ideas???

- I want to get some sort of nut with loop that will hold the line to that bell housing stud there.

- You can see where I routed along firewall. Would like to get some more cable management loops to organize that there and hold it against firewall.

- I zip tied the connector for O2 sensor to the knock sensor line for now but want to do something better to hold that connector from falling down behind bell housing or worse on exhaust.