I put an autometer Air/Fuel Gauge in the car to help tune it.  I've got the sensor on the passenger side just about 3-4 inches below the header (I've got red's dual tube headers) before the pipe takes a turn and heads to the back of the car.

My question is if anyone knows what kind of readings I should be getting under different throttle conditions.  Right now I've got it set so that once the car is warm and at idle, the gauge shows Stoich.  (the proper mix so there is excess fuel or excess oxygen... i guess)  But then once I hit the the throttle, it takes a brief dip to the rich side and then goes off the gauge on the lean side. Is this expected? 

I've got a holley street avenger 570 cfm that runs pretty well, but I don't want to be starving the engine if I can get some additional power out of it.  Are my jets to small?  

They only give detailed information in the install sheet on using it with fuel injection - they say in that case when you floor it, the gauge should go to the rich side because the engine is going to send as much fuel as possible for max accel.

Any help always appreciated! - John

John: Lake Forest, IL



'57 Fairlane 500 - Looking better every day.