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Adavnced Timing


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I have a ricky stator adjustible timing plate and I was wondering what it would be safe to advance it to. Stock motor with fmf fatty pipes. Also if I advance the timing do I need to rejet? I am running 91 octane fuel also. What benifits does advancing the timing give you?

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What jetting do you suggest for the fatty pipes. I just put them on. I have played with the premix ratio some to compensate. I had a dynoport 2-1 pipe on it before but I have no idea what my jetting is. Guess I need to just rip it apart and learn how to jet.

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You can go up to 4 degrees without worrying about detonation on pump fuel. Any more and you'll want to run 50% race mix. 7 degrees would be max with race gas and completely unnecessary with your mods. Not too sure on jetting for the 2 into 1 pipes but for tommeys and fmfs @ glamis, people are running 280 mains and the correct toomey needle. Dynojet has the right needles in their jetting kit. I would strongly suggest you lay out the $65 for this kit and be damn close. The enemy for you right now is if you're running the tock needle. The center of it is fatter than the dyno jet/toomey which will run you lean in the mid range.

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When I had my fatties on a pretty stock motor I ran 340 mains, 25 pilots (stock), and the needle lowered one position. Fatties seem to like a leaner needle. That was with no air lid and a k&n filter and stock carbs and 500' elevation in Indiana. Humid air here.

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and the needle lowered one position. Fatties seem to like a leaner needle. That was with no air lid and a k&n filter and stock carbs and 500' elevation in Indiana. Humid air here.

I run my needle in the 4th position, but that is probably due to the single carb setup.

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