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Old 05-04-2010, 08:20 PM
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Originally Posted by JAMMINKRAZY View Post
Yes you will have to re-tune. That is in fact the purpose of a venturi. Running a smaller venturi will require a leaner setting, thus it will give you better runtime. The smaller the venturi the better the runtime, but the lesser the top end of the engine(bottom end is not affected much). If you find you can sacrifice a bit of top speed, running a smaller venturi will get you more mileage.
thank you sir
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