All Small Six Keeping the carb cool

[Bill1958]

Was just out looking at the engine compartment and if I get rid of the voltage regulator, there is a ton of room on the drivers side to run a pipe right up to the radiator support to run a 4" or larger pipe for cold air. I could also run the pipe down the side to below the engine compartment and have a dustpan shaped scoop under the car to pull cold air. I could box the top of the carb and keep the open element filter too.

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That's what I was going to suggest to try...kind of a ram air from the front grill. I didn't think of under the car...if you use both it would probably create some turbulence where they meet which could be good or bad(?) If you could get the air to twist...spin as it passes thru the tube like a vortex that might have some positive effects.

 

[motopsycha]

My experience - I added a wood spacer below my stock autolite 1100 carb and added a heat shield made from a license plate that fits around the water cooled spacer and shields the carb and fuel line from the radiant heat off the exhaust manifold. The results have been great. I've commuted on some 95+ degree days with no issues, even when sitting in traffic.

 

[awasson]

Yes, absolutely. I will be making a heat shield to deflect header heat from the exhaust. That is a big priority. Then I'm going to put a box around the carb opening to direct air from the grill area straight into the carb. I think both of those ideas will make a pretty substantial difference.

 

[DON]

Remember oem have used tin shields directly over/on the exhaust manifolds

 

[wme013]

Try McMaster-Carr they have sheets of phenolic, Get a 12x12" sheet of G-10 and shape for a perfect fit. A12x12x1/4 is in the $66 range

 

[Frank]

ebay has (had) precut-to-size phenolic, I got one the right size for the carb base a few years ago. In the $20's range IIRC.

 

[John Ha]

That water cooled spacer would be the ticket if it can be refab’d to orient the Weber carb correctly.

I always thought that the carb spacer with the heater hoses connected to it was to keep the carb warm to prevent icing. Remember that the air flowing into/through the carb will have a cooling effect on the unit (it's the "wind chill" effect).

 

[awasson]

I always thought that the carb spacer with the heater hoses connected to it was to keep the carb warm to prevent icing. Remember that the air flowing into/through the carb will have a cooling effect on the unit (it's the "wind chill" effect).

The water cooled spacer, helps get the carb up to temperature and will help prevent freezing. It also probably helps to prevent overheating but unfortunately it won’t work with a Weber, which uses the funnel shaped adapter from 2V to 1V because it changes the orientation of the carb mount and puts the carb close to 90 from how it should be aligned.

 

[awasson]

ebay has (had) precut-to-size phenolic, I got one the right size for the carb base a few years ago. In the $20's range IIRC.

I ordered this one: https://www.ebay.com/itm/192096681116

 

[Otto]

This just showed up in the mail.



There's enough material to make three spacers, so this will be a future project. It was $16 plus some shipping. Phenolic sheet sold for making knife handles.

 

[awasson]

Very nice @Otto
Mine will be here on Sept 12th if nothing holds it up.