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Old 12-10-2018, 12:49 AM   #1
akart
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Join Date: Sep 2014
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Exhaust manifold heat crossover plugs

I have decided to block off my heat cross over in my new SBC manifolds. I saw somewhere some neat aluminum plugs that could be file fit into heads.
Where can I find them??
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Old 12-10-2018, 09:38 AM   #2
SunSoaked
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Re: Exhaust manifold heat crossover plugs

Much easier to just buy the correct gaskets.
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Old 12-11-2018, 04:21 AM   #3
akart
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Re: Exhaust manifold heat crossover plugs

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Originally Posted by SunSoaked View Post
Much easier to just buy the correct gaskets.
Well it is written that the thin plate or gasket can burn through.
Edelbrock exhaust crossover Plugs #2733 is what I want and I found it poking around on the net.

Last edited by akart; 12-11-2018 at 04:22 AM. Reason: sp
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Old 12-11-2018, 11:39 AM   #4
stanski
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Re: Exhaust manifold heat crossover plugs

Are you blocking them to save the paint on the intake or for other reasons?
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Old 12-11-2018, 06:26 PM   #5
akart
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Re: Exhaust manifold heat crossover plugs

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Originally Posted by stanski View Post
Are you blocking them to save the paint on the intake or for other reasons?
I have read extensivly on the pros & cons of blocking the crossover. Seems it was put in for smog to warm up the manifold quicker and is needed for some auto choke units,I have a manual choke. A lot is done to cool the carb to prevent vapor lock. Edelbrock RPM Air Gap manifolds have no cross over and states that the cooler manifold creates more HP, also spacers are used on the carb to keep it cool and prevent vapor lock and hard hot starts.
I have an aluminum manifold and it will warm up quick enough and don't want the exhaust gasses in the intake manifold. Will see how it goes...

Last edited by akart; 12-11-2018 at 06:29 PM. Reason: Add info
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