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Old 08-10-2019, 08:00 PM   #1 (permalink)
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Default Cam advance

With taller tires I have reduced my engine RPMs by 10%. I have pulled close to 35 mpg but think that four four degs of advance would improve the low end. I'm going to have two idler pulley modified so I can shorten the front portion of the timing belt and pull the cams closer to the crank....will post more.
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Old 08-10-2019, 09:24 PM   #2 (permalink)
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Originally Posted by J63812F View Post
With taller tires I have reduced my engine RPMs by 10%. I have pulled close to 35 mpg but think that four four degs of advance would improve the low end. I'm going to have two idler pulley modified so I can shorten the front portion of the timing belt and pull the cams closer to the crank....will post more.
These are an interference engine, they are a rebadged Daewoo Lacetti with a D-TEC GM engine I think. 1 notch of accidental advance on the inlet cam when doing a timing belt will result in valves kissing the pistons, and wholesale damage on the 2.0 engine. DO NOT shorten the "front" portion of the belt in an attempt to adjust timing, you will destroy the engine.
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