Edelbrok intake question
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New User
Joined: Aug 2008
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Edelbrok intake question
I have a 1977 F-150 Custom with a 351M and recently bought at Perfromer 400 intake manifold. My question is that the heads have water passages, as well as the intake, but the gaskets don't have holes for the water passages. (the intake manifold doesn't come with gaskets, but I'm talking about the ones that edlebrock suggests.) The valley pan also has the holes for the water passages. Since it is an aluminum intake do I need to cut out the holes for the passages? or does it matter?
Thanks
Thanks
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New User
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It is a 351M, I'm talking about the passages that come from the cylinder heads to the intake. The original heads, original intake and the new intake all have the holes for the passages, but the gaskets do not and the instructions don't say whether or not to cut out the holes. Thanks.
If a picture would help explain what I'm talking about, I can do that.
If a picture would help explain what I'm talking about, I can do that.
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Ah, you guys are right, the exhaust crossover ports were what I was thinking were water passages. Now knowing that, why would they want the intake hotter, if keeping it cool makes more power? And, is just leaving the gasket without the hole enough to block it? Thanks.
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Joined: Jul 2008
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From: Dillsburg PA
The main reasons for warming the intake is when the engine is first started in cold weather, and when the engine is running in extremely cold weather. Think of it this way you have cold outside air moving thru your carb at a high velocity. If you have any moisture in the carb at all it can freeze up. It's like a wind-chill effect in your carb. Typically the colder the air the drier but if there is any moisture in the air it will get pulled into you intake and exhaust as the engine cools to the ambient temp. Causing you a problem the next time you start it. So it’s up to you if this is a sunny day driver then I wouldn’t worry about opening up the exhaust to the intake, enjoy the couple extra ponies. But if this is something you might drive in the cold at all I would suggest keeping that intake warm.
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Fleet Mechanic
Joined: Mar 2005
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From: St Louis
If you have an EGR manifold then the Crossover is where the intake gets the exhaust gas for the EGR. If you plan to run EGR on the 4BBl then you need the crossover, if you are deleting the EGR you do not need the holes for the crossover.
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From: in country near Boone, IA
alxsnmr - so for the non-egr intake, do the holes in the heads need to be plugged??? I am going to run the same setup as collossal is describing. (4V eddy carb and Non-EGR eddy Performer intake on my 400).