First off I have a 72 olds 350 in my 85 cutlass. Iam running some tests on cold air induction. At times at quick accerlation the engine kind of stumbles or bogs down. My question is without an ECU and of course no mass air flow sensor how do I maintain the correct ratio of fuel to air? My air induction is a single snorkle air cleaner with a tube running down to my grill area. Thanks in advance for any help on this matter.

 

The 72's were fairly lean for emissions, and going up one jet size or a richer metering rod in the Quaddrajet can help. You are probably not going fast enough for any appreciable ram effect, only the help from sooler intake air.

 

That's what a carburetor is for.

- Eric

 

I have heard a carburetor defined as

a fuel/air mixing device which, regardless of engine load, speed, temperature, etc. will deliver a "not quite correct" fuel/air ratio!

 

Quick answer, you don't.
Without any way to change fuel metering on the fly you have no chance of maintaining the correct air/fuel ratio.
Case in point, on my EFI'd 350, at idle I can watch my intake air temp rise to 160 and above. But after a bit of airflow is allowed to move thru it, it goes down 30-40 degrees fairly quickly. There's no way a carb can compensate for that, no way.