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This is a CIS Flowtech modified fuel head so I'm not changing overall flow, I'm trying to fix it so all the ports flow equally at idle and a little above idle speed.
Over 2000 rpms it ran smooth before.
The upper chamber port that flowed the least out of all 6 had it's 3mm spring tension adjuster turned clockwise all the way so the diaphram was pushed down as far away as possible from the upper chamber metering orifice that leads up to the injector line for that port. The other five 3mm allen head spring tension adjusters were not screwed down all the way, they were all adjusted to flow close to the same amount.
If the thing doesn't work right after all this I don't know what I'll do. Maybe start saving up for EFI and sell the CIS. I like EFI and I've disliked CIS ever since the first time I saw it around 1980.
I like high compression fast responding normally aspirated engines best. I hate delayed reaction turbo lag and waiting for the limits of ancient CIS to respond to throttle position changes during acceleration just makes it worse.
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