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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Just thinking out loud.

I would love to see a picture of metering plate pushed to the end of travel where we can see the cone.

The distance between the pivot center and the point where the metering pin is located is a very small distance. Thus, a small change in that distance should make a big effect.

If the distance from the pivot is say 1.5" and we can relocate the pivot 3/8's of an inch further away, we change the ratio by 25%. That would be a lot. 3/16's would be about 12.5%. Thus, the metering pin would move about 12.5% further with the same amount of movement of the metering plate.

Remember, if we do change this ratio, then we will see a like change at all points like with the IA head. That is, if we set the CO correctly at idle, we will be 12% richer at cruse, and 'up to' 12% richer at red-line.

Old 04-29-2009, 04:43 PM
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