Tuning help pls
 

Just built my 540 and need help dialing it in.
Where can I put an o2 sensor. I have stainless marine exhaust

Flying tomato

Is your exhaust a header pipe style or manifold?

More info
 

Non-header type
I don't see any place to weld in an o2 sensor????
Surely there's a way.

It needs to go in the stainless riser closest to the manifold, this is double jacketed, so the best advice is to send it back to weld in the 0.2 bung. It should cost you less than 50.00!

Get a spacer plate made to go between the manifold and riser and put the sensor there. Make sure it is in far enough to be fully exposed to exhaust flow other wise the sensor will not read at high rpm.

It will work, I have a friend that did it.

Smitty

fIXX
 

Email Me,i Have A System That You Dont Need To Weld Anything Unless You Want To Leave The O2 Sensor In At All Times To Monitor Your Afr's..