351W air 'in the head' or 'in the manifold'?

pablon2 · #1 10-31-2009, 04:09 PM

Hi all, new to the forum here and have a noob question, I am looking to R&R my engine and tranny in my '96 F250 4x4. Although I am not new to pulling and dropping in an engine (my hobby car is a 1993 Thunderbird SC which run's mid 12s), this Windsor is new to me. SO, in order to make sure I get the most compatible engine to drop in I need to determine if my set-up has air in the head or manifold. How do I tell?

P.S. Yes, I used the search function, but when using words like air, head, and manifold I get back 500 results. lol

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glc · #2 10-31-2009, 09:23 PM

Follow the outlet of the air injection pump and see where it goes. Air in manifold will have fittings in the exhaust manifolds.

pablon2 · #3 10-31-2009, 10:40 PM

Quote:

Originally Posted by glc

Follow the outlet of the air injection pump and see where it goes. Air in manifold will have fittings in the exhaust manifolds.

I'll look up in the Chilton's book where the air injection pump is. Regarding the exhaust manifolds though, I see a tube coming out the rear of the driver's manifold and the front of the passenger's manifold (or vice versa, been a couple days since I looked at it) I wasn't sure if these are perhaps for EGR. If it isn't EGR then I have my answer.

Steve83 · #4 11-11-2009, 10:59 AM

'96 1/2-tons didn't use 2ndry air, but IDK about the heavier trucks. Older 1/2-tons only had air to the heads, going thru the crossover pipe.

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