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Old 28-09-2005, 04:52 PM
Richard L Richard L is offline
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Join Date: Oct 2003
Location: England
Posts: 4,936
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Here is the last plot of the evening. When we run 50% methanol + some timing and fuel trim, the gain is more noticeable - still using the same jet sizes - Port +Pre-turbo. I think we have gained aother 33 horsepower. See the gain as soon as the injection starts. We pulled fuel to to run at .76 afr, but will work towards 0.8 and add 6 degress advance on timing. Will work out the stochiometeric value mixture before the next test.

The previous race fuel without WI yield 720whp. We hope to reach that target on the next session on pump fuel only.

Next: We will also move on to bigger jets as time permits very soon - we will also add a small amount of nitromethane to improve flame speed, at present, the timing is approachng the race fuel (a bit slow for 8K+ engine). Engine have to do more negative work if the timing is too advanced.

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Richard L
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