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Carburetor spacers for heat #2390620
10/21/17 12:35 AM
10/21/17 12:35 AM
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RAY1969CARS Offline OP
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Hi guys what is the minimum thickness of Phenolic Spacer you should put under your carburetor to stop transfer of heat
thanks Mopar or no car

Re: Carburetor spacers for heat [Re: RAY1969CARS] #2390633
10/21/17 01:29 AM
10/21/17 01:29 AM
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sixpackgut Offline
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Probably even 1/4" will help alot


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Re: Carburetor spacers for heat [Re: sixpackgut] #2390643
10/21/17 01:53 AM
10/21/17 01:53 AM
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Kirkland, Washington
Pacnorthcuda Offline
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Originally Posted By sixpackgut
Probably even 1/4" will help alot



I agree. Additional thickness is only going to gain decreasing gains. Other concerns such as air cleaner clearance and linkage come into play..

And the discussion of power with an intake riser is another thread.

Re: Carburetor spacers for heat [Re: RAY1969CARS] #2390649
10/21/17 02:10 AM
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North Carolina
sasquatch Offline
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Check out a company called coolcarb technologies. www.coolcarb.com
Not sure of any power gains but they should help with fuel temps inside the carb.
Todd

Re: Carburetor spacers for heat [Re: RAY1969CARS] #2390661
10/21/17 02:57 AM
10/21/17 02:57 AM
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383man Offline
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I would say at least a 1/4". You can see mine here as it looks to be an inch. Its been on the car so long I forgot what size it was. And it made a ton of difference to help stop the fuel from boiling in the carb bowls. Ron


Re: Carburetor spacers for heat [Re: RAY1969CARS] #2390668
10/21/17 03:09 AM
10/21/17 03:09 AM
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We tested this stuff years ago. Found hardwood actually worked better than phenolic spacers did. We settled on 1/2" spacers. But this was years ago for sure. Also those heat shields have been around for years, in a pump gas street car with a tight engine compartment they wore worth something I would imagine. Will definitely help with boiling fuel in the bowls for sure.


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Re: Carburetor spacers for heat [Re: Al_Alguire] #2390681
10/21/17 04:00 AM
10/21/17 04:00 AM
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RAY1969CARS Offline OP
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Right on I'm going to try 1/4 thanks

Re: Carburetor spacers for heat [Re: RAY1969CARS] #2390749
10/21/17 11:49 AM
10/21/17 11:49 AM
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fredericksburg,va
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I don't know what the minimum thickness is but I made up a 2 "one out of 1/2 " Baltic birch 9 ply plywood for the race car. Carb was no hotter than the fender, the manifold-engine was to hot to touch. I was still able to close the hood with tall intake and that spacer and air cleaner (383). Wood is one of the best insulators also.

Re: Carburetor spacers for heat [Re: cudaman1969] #2390764
10/21/17 12:22 PM
10/21/17 12:22 PM
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moparx Offline
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does anyone make a phenolic adapter for a spread bore to square bore application ?
beer

Re: Carburetor spacers for heat [Re: RAY1969CARS] #2390782
10/21/17 12:47 PM
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Tulsa OK
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If you really wanted to isolate the carb from the manifold you would also need to use nylon or fiber washers under the carb nuts. Probably minimal gains but thats one less spot to transfer heat.

When I had a carb my vapor lock problems were rare even with a stock hood, but it seemed to be underhood temp as opposed to engine temp that got them. I have an old trans temp gauge hanging near the master cylinder. When it reads over 180* is when vapor lock problems seem to start. In a stock engine compartment full of hot air I am not sure you can make much of a difference. I never had room for a spacer so I was never able to try.


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Re: Carburetor spacers for heat [Re: RAY1969CARS] #2390792
10/21/17 01:18 PM
10/21/17 01:18 PM
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I try and use a 1/2 minimum or more if possible according to the type of manifold, rpm range and of course space available.........I run a 1/2" 4 hole under my Dommy..............


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Carburetor spacers for heat [Re: sasquatch] #2390796
10/21/17 01:23 PM
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Originally Posted By sasquatch
Check out a company called coolcarb technologies. www.coolcarb.com
Not sure of any power gains but they should help with fuel temps inside the carb.
Todd


Not too impressed w/a 100+ degree carb and I posted a video on VB where my engine was around 160 the intake 120 ish and my carb was 71 degrees after sitting w/just a 1/2" wooden spacer............ thumbs


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Carburetor spacers for heat [Re: Thumperdart] #2390799
10/21/17 01:26 PM
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sixpackgut Offline
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The best way to keep a carb running nice and cool is a bypass fuel regulator after the carb so cool fuel is always available. Even with this setup, the secondary fuel bowl can get really hot on those 100 mile drives between fill ups


Gen 3 power 6.22@110, 9.85@135
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Re: Carburetor spacers for heat [Re: sixpackgut] #2390811
10/21/17 01:49 PM
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Thumperdart Offline
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Agree that a TRUE return is best and my pump just returns straight into the cell but wonder if I can mod it and will call Magna-fuel and ask em for giggles............ beer


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Carburetor spacers for heat [Re: sixpackgut] #2390825
10/21/17 02:07 PM
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383man Offline
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Originally Posted By sixpackgut
The best way to keep a carb running nice and cool is a bypass fuel regulator after the carb so cool fuel is always available. Even with this setup, the secondary fuel bowl can get really hot on those 100 mile drives between fill ups



Thats true. I have got away with my deadhead setup but I have a return type regulator I would like to install. Course I have a stock tank and will have to find a sending unit with a port or take mine out and make a port for a return line. I have also heard wood is the best isolator to use and I may switch to wood soon. Ron

Re: Carburetor spacers for heat [Re: sasquatch] #2391452
10/22/17 09:40 PM
10/22/17 09:40 PM
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Originally Posted By sasquatch
Check out a company called coolcarb technologies. www.coolcarb.com
Not sure of any power gains but they should help with fuel temps inside the carb.
Todd


I’m going to give that a try.


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