Downpipe...

[Mr. Austin]

I Assume the that is an O2 sensor nut half way down the pipe? With a carburetor i would also assume your using that for your Air Fuel ratio. Unless you have one of those wicked fuel injected carburetors. Im saving up for one. $1500 bucks

[mntony]

Yes you are correct. That bung is for my wide band o2 sensor. It's a necessity when you are carburated with a blow through application like this. The carb I have probably cost me every bit of $1000 to build. It came from all new parts with billet metering blocks, billet baseplate, dual needle and seat bowls, annular boosters, and the 'crutch' power valve actuator. It's a neat carb and from all indications should work great. My plan is to run E85 through it so the fuel system is rediculous. An Aeromotive Pro Pump and controller, -10 lines up and back, sumped tank, Aeromotive bypass regulator...it's just nuts. This started out as such a simple 'junk yard' twin turbo build, that became this sick obsession! LOL