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Thread Starter
Intermediate
Joined: Apr 2011
Posts: 32
Likes: 10
Hi,
I'd like to revisit the issue with vapor lock.
I'd like to block off the channel in the intake manifold below the carburetor.
I'm not clear on where the channel leads in the cylinder heads on the left and right.
I want to reduce the heat entering the intake manifold.
Could there be any problems with the exhaust if the channel is blocked?
Perhaps someone has a picture showing how the channel runs in the cylinder heads.
Thanks and regards,
Udo
I'd like to revisit the issue with vapor lock.
I'd like to block off the channel in the intake manifold below the carburetor.
I'm not clear on where the channel leads in the cylinder heads on the left and right.
I want to reduce the heat entering the intake manifold.
Could there be any problems with the exhaust if the channel is blocked?
Perhaps someone has a picture showing how the channel runs in the cylinder heads.
Thanks and regards,
Udo
Le Mans Master
Joined: Nov 2015
Posts: 7,466
Likes: 2,645
From: Really Central IL Illinois
Assuming you have the intake off, John is correct. FelPro makes a metal restrictor that completely blocks off the exhaust from the head. When you put the intake gasket on each side, you use the restrictor. FelPro 1204 gaskets The exhaust heat is forced thru the intake manifold when the heat riser valve in the exhaust pipe is closed, so you need to wire the valve open or remove the flapper. There is also a spacer made to replace the heat riser completely. The following is the heat riser valve on the passenger's side.
https://www.topflightautomotive.com/...uel-injection/
Here is an older thread with the info.
https://www.corvetteforum.com/forums...d-gaskets.html
If the intake is not off, you can use welch plugs to block the holes in the intake. I am not sure of the size, but if you take a drill bit and put in the holes you can determine it. Your FLAPS will have welch plugs. You could also drill and tap the holes for Allen head set screws.
https://www.topflightautomotive.com/...uel-injection/
Here is an older thread with the info.
https://www.corvetteforum.com/forums...d-gaskets.html
If the intake is not off, you can use welch plugs to block the holes in the intake. I am not sure of the size, but if you take a drill bit and put in the holes you can determine it. Your FLAPS will have welch plugs. You could also drill and tap the holes for Allen head set screws.
