Here is a photo of my 1494's Valley Cap. The gap between the top of the cap and the bottom of the intake manifold is approximately 13//16"
Valley Cap-1956.jpg
Historian
Here is a photo of my 1494's Valley Cap. The gap between the top of the cap and the bottom of the intake manifold is approximately 13//16"
Valley Cap-1956.jpg
Last edited by Pat Marshall; 07-08-2024 at 08:26 AM.
Pat Marshall
Lancaster, OH
Historian
I have both the 9424-A and the 9424-C intake maifold, and they appear to be the exact same dimensions. The only difference is the size of the hole for the Temperature Sensor (1/4" vs 3/8")
The parts manual says that 9424-A was used 1n 1956 and that 9424-C was used in 1956/1957.
Obviously, 9424-A was only used with the Holly Carburetors. However, 9424-C could have been used with both Holly and Carter. One could assume that the change to the 9424-C intake manifold was concurrent with the change to Carter, but I have seen no proof of that.
Pat Marshall
Lancaster, OH
Historian
I have made the same assumption.Originally Posted by Pat Marshall
It turns out my friend’s clearance problem was from it having 2 3/8” thick carb spacer to help with vapor lock, which is actually a fuel pump problem.
Barry Wolk
Farmington Hills, MI
C5681126
Sponsoring Member
That's a really thick spacer, no wonder the hood cannot be closed! If you are looking at the section drawing showing the engine and hood, the distance is minimal.
Roger
Historian
2 3/8”? KOWABONGA, Buffalo Barry!
Pat Marshall
Lancaster, OH
Historian
(2) 3/8" Spacers.
On the ventilator. I think the intake size may have had to increase with the compression ratio of the '57. The smaller inlet and horse hair packing may have negatively affected the draft tube's ability to pull sufficient acidic fumes from the crankcase, spoiling the oil.
Barry Wolk
Farmington Hills, MI
C5681126
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