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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 01-22-2011, 06:24 PM   #1
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Old 01-22-2011, 08:27 PM   #2
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Whay exactly is there to agree or disagree with? It's science, pure and simple. Putting into application with a reasonable margin for safety is the trick. Oh... and post cliffs...
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Old 01-22-2011, 09:18 PM   #3
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Old 01-22-2011, 09:42 PM   #4
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I agree with both.

The first dyno is my standard "super-safe" tune, 2nd is +3*, and 3rd pull is +5*(total increase) or spark:

All pulls had at least a couple minutes of the fan in front of the IC so I doubt it was heat-soak that killed the output on #3. Ignore AFR, it's .3 lean on this dyno.
On the richness issue, I planned on running 12:1 AFR but more fuel made more output until about 11.6:1, richer than that and I see a dramatic decrease in output.
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