The Importance of correct flanges...

[Y-TRY]

I mentioned in another thread that I had an issue with mis-matched flanges. Here's what I speak of.

I bought a set of headers made for another engine. At the time I didnt have the choice of changing head flanges. Besides that, I went with 1 5/8 tubes and large AFR ports. Well, here's the result:



As you can see by the soot and burn pattern, the flanges don't match very well. Conveniently, though, the heads burned a neat stencil into the flanges showing me exactly where they are off. Gee, I wonder if this is costing any power on my turbo car? (just kidding).

I am going to try to band-aid it and blend-in the corners and side edges using the marks left by the exhaust. It still can't be exact because the actual ports are spaced differently and larger than the primaries. You can even see the hot/cold spots.

It's one of those "shoulda had a V8" head knocking moment. But I'll figure it out and show you some "after" pictures.