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Old 09-21-2009, 02:07 PM   #1
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Default "need" a venturi?

My understanding about the various venturi sizes is that they serve two purposes. In no particular order those purposes are:

A. Gas Mileage

B. Traction control (so the car is not "overpowered" and out of control.)

Is there any other purpose(s) the venturis serve? Also, if neither of the aforementioned items is an issue for me, is there any benefit to putting a smaller venturi in the carb?

Thanks for your help.
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Old 09-21-2009, 09:48 PM   #2
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You pretty much got it. Saving fuel taking away some of the power.
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Old 09-22-2009, 09:07 PM   #3
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You should get alittle more low-end and better throttle response due to the
increased speed of air entering the carburator when using a smaller venturi.
(better fuel,air atomization) On the flip side you'll lose some top-end. I hadn't
tested it yet, but soon will.
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Old 09-23-2009, 06:18 AM   #4
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Last weekend I put the smallest venturi in both of my engines 6mm. Th track was smaller and more technical. Here was one long straight on the back side that you could still open it up on. In the truggy there as a little overall power loss but I still had good bottom and top. In the buggy it acted like I har more top. The bfgy was so fast down the back straight that I would swear the engine was going to blow into pieces. Temp was not too high and there was a little smoke but not a whole lot. I was running a 6.5 in the buggy ao it's not a huge difference but I definatly did not lose any top end I may have gained some top end or it was just tuned right.
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