Rotated upper Manifold

Rotated upper intake manifold from a non-turbo 2.3 Mustang.

Since there are so many 2.3 Mustangs from 87 and on, I decided to cut up on of those manifolds. On my first attempt, I cut and rotated the manifold 90°. I trial fitted the manifold on the car and found out the interference problem with the alternator. Then then recut and reworked the manifold in the following way.

I cut the manifold 1 inch up from the bottom and then recut a slice out of the upper part. Total material removed was .25" on the front and .65" on the back side.

I then had my welder TIG weld the manifold cack together at approximated 100-100° rotated. Notice that I had him add extra material all around the weld for match porting. For more pictures of the weld, click here and here.

I fit the manifold to the lower to make sure of proper fitment and then started to port the thing. I removed a lot of material but only match ported the upper.

The final result aligns the upper to the side of the alternator just enough to work great.

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