Anyone fill me in on the following carb spacer? I have this same design spacer under my Autolite 2100 2bbl on a stock 352, but the heater hose nozzles are capped off, heater hoses go straight off the water pump and intake manifold. What was the purpose for running a hose thru the spacer... hotter water for the heater in winter? Thanks!

 

My understanding was it helps to warm the incoming fuel/air mix for better atomization. I still haven't reconciled that theory with the one that says colder (denser) air is better...

 

It has to do with better atomization in cold weather. It keeps the air warmer so the fuel doesn't separate under the carb. Cold air makes more power as long as the mix stays homogenized(whew!! getting a headache with those big words!!). Cold air takes less space so more enters the cylinder to burn- more air/fuel, more bang. If you are in a mild climate, it is not needed.

 

Rare piece! Warms the A/F mix and prevents icing, better driveability.

 

And would you believe it also helps reduce vapor-locking.

Barry

 

Barry, can you explain the vapor-lock prevention? I don't follow that.

 

The coolent acts as a temperature stabilizer so the carb. doesn't get too cold and it doesn't get too hot. When the carb. mounting flange on the intake gets hot from the engine the coolent spacer removes some of the heat so it doesn't reach the carb. base. In fact, the 200 and 250 I6 engines will vapor lock without their coolent spacer.

Barry

 

Thank you!!!! now I unnerstand!!!

 

Barry... in San Antonio, Texas. Winter temps might hit freezing a couple of times, mostly range 35-40 lows... leave the nozzles capped off? Thanks!

 

That's what those 2 tubes are! I have the identical carb spacer I got with my manifold. Haven't put it on and I wasn't sure what those were for. Can you give a little explanation how they hook up to the heater hoses, like routing and such? Is the way you have it in the picture the way it would sit on the manifold?

It really helps with vapor-lock? You would think running hot coolant around the carb would heat up the fuel. If I live in a moderate climate, say, San Diego, CA, would this coolant spacer help any?

Also, it has C9ZE-9A589-B stamped into it. Can someone decode this for me?

Thanks

Dennis

 

Golfer, I'd run it both ways and see what difference it makes.

Dennis, here's a pic of the routing:

 

Great, thank you! Pictures are even better.

Dennis

 

BTW, do you think running cold water thru the coolant spacer, rather than hot coolant, would help with power any?

Dennis