Not Ranked
rdorman,
How do you know for sure what your A/F ratio was? How does the dyno operator measure it? If he places a "sniffer" into your exhaust it could be fooled if you have any sort of exhaust leak. I know on my 351C, I had a leak where the headers joined the side pipes. I would think that the only true way to measure A/F ratio is to install an O2 sensor in the header itself.
Anyway, I agree with CobraEd. It sounds like you're running too rich if you have black smoke. BTW, did you know that brake fluid will produce white smoke? (don't ask how I know)
Cheers
Jim
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