All Small Six Keeping the carb cool

[drag-200stang]

Aluminum is a good conductor and will also conduct heat to the other side, steel would better, and better if mirror finish on the side to reflect heat away. A barrier of anything would be better than none.
I agree with what Frank said.

 

[awasson]

I’ve got to say, I am very happy with that little 6mm phenolic spacer. The car is definitely more responsive to the pedal. When I took it out after I had done the update, I thought it pulled quicker but wasn’t certain. I had it out this afternoon for a while and now I’m certain there are tangible improvements. It revs a little quicker under load when you put your foot into it. It’s noticeable and the intake sounds like it’s more open when you’re on the throttle (if that makes sense). It kind of roars.

it’s also very responsive at low speeds. It wants to take off like a rocket as soon as it gets off the idle circuit and onto the mains and with the low gearing in first gear on my 5-speed, you have to really take it easy if you’re just idling around in a parking lot at the grocery store.

They ought to include these in the kit.

 

[Frank]

I’ve got to say, I am very happy with that little 6mm phenolic spacer. The car is definitely more responsive to the pedal. When I took it out after I had done the update, I thought it pulled quicker but wasn’t certain. I had it out this afternoon for a while and now I’m certain there are tangible improvements. It revs a little quicker under load when you put your foot into it. It’s noticeable and the intake sounds like it’s more open when you’re on the throttle (if that makes sense). It kind of roars.

it’s also very responsive at low speeds. It wants to take off like a rocket as soon as it gets off the idle circuit and onto the mains and with the low gearing in first gear on my 5-speed, you have to really take it easy if you’re just idling around in a parking lot at the grocery store.

They ought to include these in the kit.

There's multiple benefits to an insulated spacer. Plenum increase, straightening of the airflow before the runners and the cooler carb. I was blown away when Engine Masters did a test of fuel temperature. I don't know how much cooler the gas would be while running with a spacer though, but at least somewhat cooler I would presume.

In the test gasoline that was around 40* added double-digit power to the dyno mule over gas @ 100*. The reason was the cooling effect on the plenum/runners, increasing density. The runner temps dropped almost equal to the gas temp drop.