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if you have stock pistons , you'd be wise to notch the pistons or else if you retard or advance the cam timing to avoid ptv then performance could suffer if the valve events are not at the optimal setting.
Originally Posted by dudegirl
Be polite and cordial when you talk to them, as pissing off the guys that can help you is seldom a good idea.
Advancing and retarding the cam has been used to fine tune an engine for many years. That's why so many gear sets have differant slots for the key way.
Advancing the cam will move the power band down a little. And retarding the cam will move the power band up a little. Usually about 300-400 rpm's; so it won't make a huge differance. You might see a small gain or loss in total power, but it's so small that you'de need a dyno to see it.
You should use a crank gear with multiple slots for accuracy. If you simply slip the chain one tooth on the crank gear, you could get a variable amount of timing change. By looking at the numbers you posted, you advanced your timing by 2*. That's not a problem, and it seemed to work out for you. Since it measures out well, I would not change it. Run it as is and it will be fine.
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