Intake manifold holes plugged.
Hi Guys. is there anyone who can tell me what the reason good be why the two little holes are plugged ? Could it be for less fuel consumption ? Can I unplug the holes again ?
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Comment by Jason Edge on January 29, 2013 at 7:15pm
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Bottom line if running a stock setup with original Carter AFB or Rochester 4GC, factory insulator, heat riser, etc, you will want this exhaust channel unblocked and clean for good cold startup performance, especially if you live in the colder climates. .
If running an after market carb you simply do not need or want the extreme heat per their design. Even with the heat riser removed I was still getting 300+ degree temps across this port which you can see in this video: http://6364cadillac.ning.com/video/1964-cadillac-intake-heat-temps
With aftermarket Edelbrock 1411 I eventually completely blocked the intake to cylinder head exhaust passage during my last engine rebuild.
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Comment by Cees de Bunje on January 29, 2013 at 5:02pm
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Thanks Tony. I was not sure if it could be removed. Closer examination of the plug revealed a fingerprint in the plug. so it was done on purpose. thanks for the explanation. Cees.
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