O2 sensors and leaded gas

[BigBlockOlds]

Just curious if there are any O2 sensors being made out there than can hold up to a leaded race gas?
The leaded race gas is more popular in this area and easier to get, so I was just curious.
I'm hoping to get by on standard 93/94 ocatne pump gas but I think it will be close. I'll be around 11:1 compression with aluminum heads.

Thanks,

[Goatman]

You should be fine with pump gas, depending on your cam and how much cylinder pressure it builds.

I am not aware of any O2 sensors that can work with leaded gas. But I am aware of a trick to "get the lead out" of them once they get clogged up...

[camcojb]

The FAST widebands seem to tolerate leaded gas very well; there have been guys using them on race applications for a long time without failure.

Jody

[Goatman]

They use them for long times becuase they clean them out every year. There is no difference between those and the other kinds out there as far as lead tolerance goes.

I used them on my old race car.

[BigBlockOlds]

[quote=Goatman]You should be fine with pump gas, depending on your cam and how much cylinder pressure it builds. quote]

The cam thats going in is a hydraulic roller with 252/252 duration @ .050", .576"/.576" lift and 112* LS. The lobe separation may hurt me a little but I'm going to give it a try.
Its a 455 Olds with an offset ground, 425 forged steel crank, BBC rod journals, 6.990" aluminum rods and Arias flat top pistons.

I did find an oil company that sells 100 octane (104 research) here locally that I could buy from if need be.

Thanks,

[dhardison]

But I am aware of a trick to "get the lead out" of them once they get clogged up...Would you mind sharing this trick? :naughty:

[6'9"Witha69]

I run 10.8:1 and use 91 Octane gas regularly. You should be fine.

[Goatman]

Would you mind sharing this trick? :naughty:




Pull 'em, heat 'em up cherry red, whack 'em on a bench. All the lead deposits will fall out of them. Drag racers been doing it for years. ;)

[camcojb]

They use them for long times becuase they clean them out every year. There is no difference between those and the other kinds out there as far as lead tolerance goes.

I used them on my old race car.

we'll agree to disagree. I've had others fail almost immediately. I have run several tanks of race gas through my FAST in the past, never had one fail, and never cleaned or removed them. They do not use the same sensors as others I've had.

Jody

[Goatman]

They use a high quality 7 wire sensor. Nothing more..

[camcojb]

They use a high quality 7 wire sensor. Nothing more..

okie-doke. All I know is they tolerate lead better than any other wideband I've used, which was the original question.

Jody

[parsonsj]

The FAST uses a 5 wire NTK L2H2 oxygen sensor, but provides 7 wires to the plug for resistance calibration.

Maybe FAST's lasts longer because they pay attention to calibration?

jp

[Goatman]

Its possible. Only other thing I can think of is that the manufacturer uses some coating on the metal that resists lead buildup, or maybe the holes in the sensor are larger???

[Doug F]

I've never killed an NTK at work with lead. I wouldn't expect to put 15000 miles on one, but a couple of thousand.

The Bosch WB's are not supposed to be as good with lead. I've also understood that it is not just lead, but some other additives that affect life as well.

If you put a bunch of miles with race gas you should be able to afford changing the sensor now and then!