[albynorhyno]

I'm installing a Sniper EFI on a BBC with Lakester headers.
Ideally, the bung for the O2 sensor will be 6-10 inches after the collector for a true reading of all cylinders, and a minimum of 18" of exhaust pipe behind the O2 sensor. (Holley specs)
I have neither with these headers.
Has anyone tried this? Will I get false readings? Maybe add a sensor extension?
Thanks guys.

 

[BigMo]

Thought it was x inches from the exhaust port....
mock it up in a discreet area on the collector w it installed on the car and standing there lookin at it. Try to hide it from view...weld bung...install. i would do more research they dont go that far down the pipe

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[albynorhyno]

Thanks BigMo,
I've talked to a local speedshop, he thinks the baffle will create enough back pressure to help with the oxygen reading from the outlet, and recommended welding the bung at least 2-3 inches beyond exhaust port.
I'm still researching, got a couple more calls to make.
Appreciate all the info I can get.

 

[cerial]

Contact Holley. This may be as easy as going narrow to wide band then tuning for it.

 

[albynorhyno]

Thank you cerial,
I had no idea about narrow and wide band! I learn something every day hot rodding.
I have contacted Holley, they didn't mention this, I will contact them again.

 

[albynorhyno]

Bosch LSU 4.9 Wideband Oxygen Sensor.
This is the sensor that came with my kit.
Encouraging!
Thank you again.

 

[BigMo]

your on the right track...between 3 and 6 " from the port is common

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