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F22C1 at 9000rpm?

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Old 02-22-2005, 07:03 PM
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So, proper tuning and upgrading the pistons and rods is basically what will make the F22 more reliable at 9K rev's?
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Old 02-23-2005, 07:28 AM
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Are there any differences between the F20C head and the F22C head that might make it more sencitive to revs? (valve springs, retainers, etc.)
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Old 02-23-2005, 02:02 PM
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No the heads are, for all intents and purposes, identical.

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Old 02-23-2005, 05:22 PM
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The cams and springs are identical as well?
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Old 02-23-2005, 05:38 PM
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Cams are different. Haven't checked springs.
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Old 02-23-2005, 06:25 PM
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I would figure that if anything, the springs would be softer since the redline was lower, but I figured the cams would be more agressive due to the larger displacement (which might require stiffer springs)...
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Old 02-24-2005, 07:09 AM
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Here's what Honda says about the new cams: (from http://www.hondanews.com/CatID2069?mid=200...41254&mime=asc)

VTEC (low-speed profile):
Low-speed intake duration decreased and exhaust duration increased for more torque.

VTEC (high-speed profile)
High-speed intake and exhaust duration slightly decreased for torque and top horsepower
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Old 02-24-2005, 05:03 PM
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So the head is the same but the cams and possibly the springs are differnet.
Very interesting indeed.
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Old 02-24-2005, 05:06 PM
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It would make since that Honda would use softer valve springs on an engine that wasn't intended to rev as high due to the reduced load.
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Old 02-24-2005, 05:08 PM
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I wonder if the cams (and valve springs) from the F20C would be better on the F22C if the rev limit was higher.
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