Compression ratio

furrystump said

You do lose a good amount with exhaust manifolds, but you can run pretty well with the manifolds. I just lost to an AAR running those manifolds. He ran 11.80 at 119mph. I’m surprised edelbrock didn’t say “gee, I never heard of that problem before!”

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Yeah, can you believe that? I would have expected them to offer some sort of fix, but the only advice they would offer was to switch to headers. I would have thought that they would have been aware of the issue, but I guess fix would be to re-engineer the heads, which would cost more than the problem was worth.