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free dyno run... alittle low?

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Old 12-11-2011, 06:06 PM   #1
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Default free dyno run... alittle low?

so a local company had a free dyno day today and i got one pull. i was hoping she would atleast put down 300. it seemed like she broke up near the top end and was throwing alittle bit of black smoke out. definitely could smell unburnt fuel. hows the graph look to you guys.

also would one stage colder plugs cause the rich/unburnt fuel smell?
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Old 12-11-2011, 06:09 PM   #2
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Yep something is going on with it.. those are even STD numbers.. when's the last time you did maintenance on it? I.e plugs/wires/o2 sensors/fuel filter/cleaned maf/new air filter?
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Old 12-11-2011, 06:11 PM   #3
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plugs/wires/air filter about 3k ago. havent done o2/fuel filter, been awhile since i cleaned the maf. i figured something was up. she pulls strong just numbers seem low.
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Old 12-11-2011, 06:14 PM   #4
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Could be valves floating up top as well.. how many miles on the car?
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Old 12-11-2011, 06:15 PM   #5
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i think i just turned over 103k

i wanted a base number, i have a set of 243s, ls6 intake and longtubes sitting here waiting for me to get my cam.

with the fuel smell, guess that could be bad o2s.
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