Quote:
Originally Posted by Jim Cimarolli
When the 359 came out I back to back tested it at the track verses the 163 and my car ran exactly the same. However, I had searched out and culled through several of the older 163 manifolds to find a nice one, and it was the Dzus version.
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Jim,
That does not surprise me. I'd figure that a hand selected/sorted 163 would be real close to the 359. That's the advantage of the 359, you just go order one, where as with the 163, you might buy 5 or more and sort through them to get a good one, and the only way to know is to dyno it or take it to the track.
As far as the newer replacement 163 intakes made in the eighties and nineties, I think they are the reason GM went to the 359, because a lot of the later replacement 163 intakes I've seen I wouldn't put on an engine.