Manifold cylinder filling compensation through valve adjustment

FlashPro questions & answers specific to the 2006-2009 (US, UK, Asia) S2000
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CTRLFRK
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Manifold cylinder filling compensation through valve adjustment

Post by CTRLFRK » Sat Apr 28, 2018 11:22 am

Manifold cylinder filling compensation through valve adjustment.
hondata excerpt.png
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Has anyone tried compensating for the greater filling of cylinder 2 and 3 by adjusting the valve clearance on the intake side to help average the air that all cylinders see?

An example would be
Cylinder 1 and 4 would be .25mm,
Cylinder 2 would be .21mm
Cylinder 3 would be .23mm

Would this help all cylinders get consistent filling?
2006 Honda S2000

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Hondata
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Re: Manifold cylinder filling compensation through valve adjustment

Post by Hondata » Wed May 02, 2018 8:21 am

No, don't set the valve lash to anything other than factory specifications. The changes you have will not make much difference to cylinder filling.

I would reduce the ignition timing slightly on those cylinders. What knock counts do you get over what time period, and what is the knock control?
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CTRLFRK
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Re: Manifold cylinder filling compensation through valve adjustment

Post by CTRLFRK » Mon May 07, 2018 11:01 am

I am not getting any knock counts. That was an excerpt from your help file. My suggested valve clearances were still within the suggested range from Honda. I did however have my logic reversed for the cylinders, flip what I said for Cylinder 1/4 and 2/3. My objective was to get as consistent afr between all cylinders as possible. It was just an idea to achieve a little greater accuracy.
2006 Honda S2000

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