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The 2005 SKUSA rules are out. You can get them from the the SKUSA website.
I have some questions that I was hoping someone could help me understand.
Here is the rule:
20.3.10.3 Carburetors: OEM as supplied from the engine manufactureer. Jetting is open. You may install washers to the OEM needle jets for the purpose of tuning. The means that the throttle connect is non-tech, but you must use the OEM arm and shaft assembly.
So what does the last sentence mean? And what is the OEM arm and shaft assembly?
While I am asking questions, what would installing washers to the needle jets do for tuning? And why would this have to explicitly stated when jetting is open?
Tom
Dr Tom:
Once again you need to realize that this isn’t the acadamia world you’re immersed in!
8)
I have no idea other than it means we can cheat, right?
I’m assuming the section you quoted is in TAG, and again I’m assuming it refers to butterfly carbs.
The arm and lever I expect is mentioned because they want to allow fixing the tillotson weakness of the mounting point coming off the end of the butterfly arm. The reason they say arm and shaft remaining standard is because they do not want to put a special high flow butterfly and shaft mechanism in it’s place.
I’d say the washer reference is also to the tillotson type carbs where some people like to add washers between the needle jet and carb body to improve sealing. Also, if the carburettor is set up so that you need to have a number of turns out on the jet they are a help as otherwise they have a tendency to fall out.
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