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Old 09-20-2019, 06:20 AM
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Ford small block carb spacers

Got a question. In attempt to control this vapor locking/heat soaking issue, I'm going to also install a plastic carb spacer on my 68 Fairlane.

I've got two carburetor spacers. The brown one I picked up at a car show and the other one is unused, I not sure where it came from. I think it came with the rebuild kit I bought 20 years ago because there was another base gasket with it in the ziplock bag. Why I did not install it at the time I have no idea. Maybe I didn't think it was important.

There is already a carb spacer on this car but it is not steel. This should be the part I am talking about. Looks aluminum to me.

https://secure.cougarpartscatalog.com/carbspcr2v.html

Reason I ask is the PVC system vents into a port on the back of this aluminum spacer. There is no port on the plastic spacer for the PVC hose.

So I guess as long as the linkage is long enough I can just place this plastic spacer between the original aluminum spacer and carburetor?

Hopefully the studs are not seized since I'll have to install longer studs. That would open up a can of worms if I were to break one off in the intake manifold. So I'll need to soak it down with PB Blaster and hit it with a propane torch before attempting to remove them.

It may be worth trying to just drill and tap this plastic spacer for a PVC port. I've got all the drill bits and tap to do it.

So should I stack the plastic one on top of the factory aluminum spacer and use longer studs or drill and tap the plastic spacer for a PVC port?
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Last edited by jseabolt; 09-20-2019 at 06:43 AM.
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Old 09-20-2019, 09:21 AM
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Likely not much to be gained with spacer swaps.
Maybe a heat shield would work.
Easy to make from 1/8 inch aluminum plate.
I’ve made them from cookie sheets!
Like this for a Holley 4 bbl.
Your carb studs should be long enough.

https://www.holley.com/products/fuel...s/parts/108-70
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Old 09-20-2019, 01:03 PM
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5,o heat sheild

early 80;s 5,0 Mustangs with the holly 4 barrel had factory aluminum heat shields. I don't know if the 2 barrel cars used them I'v only had the H,0 4 barrel cars.
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Old 09-20-2019, 01:49 PM
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I'm not really expecting any HP gains from using one. I've read this plastic spacers help preventing heat soaking.
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Old 09-20-2019, 01:56 PM
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spacer

Quote:
Originally Posted by jseabolt View Post
I'm not really expecting any HP gains from using one. I've read this plastic spacers help preventing heat soaking.
yes the plastic will be better for less transfer of heat. just drill and hole in the back and tap it..... i had a '66 fairlane a few yrs ago.
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Old 09-20-2019, 02:19 PM
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As long as the plastic spacer is solid and not a hollowed out lightweight casting, you can tap it, no problem. Done it before on both phenolic and plastic spacers.
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