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10-31-2024 09:30 AM #1
CHR Member/Contributor
- Join Date
- Sep 2007
- Location
- Gardner, KS
- Car Year, Make, Model: '33 HiBoy Coupe, '32 HiBoy Roadster
- Posts
- 11,244
Welcome to CHR.
I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed compared to WOT. Getting this mixture to burn completely takes more timing. I think you're getting surge because of unequal burn between cylinders. Here's a really good explanation of vacuum advance - (link)
https://www.onallcylinders.com/2015/...y-you-need-it/Last edited by rspears; 10-31-2024 at 09:53 AM.
Roger
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I'm happy to see it back up, sure hope it lasts.
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