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Old 01-03-2007, 10:56 PM   #1
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Default How do different carb inserts affect performance?

I have a MR Ninja B01 engine and noticed that they make different carb inserts for it. How do these affect performance?
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Old 01-04-2007, 06:40 AM   #2
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They change the economy and power curve of the engine.

Small = more fuel economy, less power
Large = less fuel economy, more power

Remember that you have to lean it out with the small insert (less air going in but at a higher speed) and richen it with the larger inserts. That in addition to your daily (hourly) tuning for your conditions.
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Old 01-04-2007, 10:33 AM   #3
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one other thing to add, smaller restrictors make an engine more driveable. If you find your car has lots of wheel spin on a low traction track, a restrictor will help reduce that quite a bit.
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Old 01-04-2007, 12:15 PM   #4
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I started out using the red insert on my V-Spec for a very loose, dry track and never changed it since. The funny thing is that my buggy/truggy is as fast as anything out on the track but I get about 20-25% better fuel economy. (I only need one pit stop vs. two for everyone else. That is a 7-15 second advantage.)
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