1969 350/300 intake gasket
12-15-2016, 01:35 PM
#2
Team Owner
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Hi b,
The intake runner passes right under the carb and choke; the exhaust flow helps warm the coil in the choke mechanism so it opens more quickly.
Blocking the passage slows down that occurrence.
Some 'fastidious' owners block the passage so the paint on the intake in that area doesn't darken from the exhaust heat.
How important is the operation of the choke to you based on where you live?
Regards,
Alan
The intake runner passes right under the carb and choke; the exhaust flow helps warm the coil in the choke mechanism so it opens more quickly.
Blocking the passage slows down that occurrence.
Some 'fastidious' owners block the passage so the paint on the intake in that area doesn't darken from the exhaust heat.
How important is the operation of the choke to you based on where you live?
Regards,
Alan
Last edited by Alan 71; 12-15-2016 at 01:35 PM.
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bucharli (12-15-2016)
12-15-2016, 04:09 PM
#4
Team Owner
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Hi b,
Most cars with painted intake manifolds have the darkened area.
Even high-temp paint usually darkens after a while.
Regards,
Alan
Most cars with painted intake manifolds have the darkened area.
Even high-temp paint usually darkens after a while.
Regards,
Alan
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bucharli (12-15-2016)
12-15-2016, 04:27 PM
#5
Dr. Detroit
Member Since: Mar 2012
Location: New Braunfels Texas
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1204 Fel-Pro block off the heat port.........
I recommend it unless you have to have a choke.
Jebby
I recommend it unless you have to have a choke.
Jebby
12-15-2016, 06:22 PM
#6
Instructor
Thread Starter
I do plan on using this car, and it gets cold in both states I live in. and since florida doesn't get much snow, I will use it more. do you think using the restrictor they have vice wide open will give me a desired effect? the repro gasket I have has nothing, and a original I have found have a block off plate built in.
Last edited by bucharli; 12-15-2016 at 06:24 PM.
12-15-2016, 06:28 PM
#8
Instructor
Thread Starter
hi alan,
do you have a picture of the back of the passenger valve cover. I haven't put my HY sticker on yet. just wanted a accurate idea before I do it.
do you have a picture of the back of the passenger valve cover. I haven't put my HY sticker on yet. just wanted a accurate idea before I do it.
12-16-2016, 12:31 AM
#9
Team Owner
Unless you drive the car in very cold weather (and it is very cold where it is parked), you don't really need the cross-over passage heating. The choke will still work, but it will take a bit longer to shut down. Of course, when you think it is idling too high, you can 'pop' the pedal and force the choke to drop out.
So, my advice is to use the blocker plates AND cut the heat riser valve off its shaft...so that it can never get stuck in the closed position. No intake manifold paint "burning".
So, my advice is to use the blocker plates AND cut the heat riser valve off its shaft...so that it can never get stuck in the closed position. No intake manifold paint "burning".
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bucharli (12-16-2016)
12-16-2016, 05:05 PM
#10
Le Mans Master
We used to cut blocker plates out of antifreeze cans and put them in when we had the intake off.
(Some probably have never seen antifreeze in a can!)
(Some probably have never seen antifreeze in a can!)
