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Old 05-29-2008, 09:29 PM   #1
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Default Tuning with carb restrictors

Hello everyone. What are the benefits to tuning with carb restrictors? I have heard they can really take the punch out of a motor. If carb restrictors are installed could it improve mileage? Also would I tune a motor with a restrictor installed in a similar fashion as I would without a restrictor in? Any info would great.
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Old 05-29-2008, 09:33 PM   #2
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I am wondering this myself, I made the switch from my old hyper 7 which I had to baby around the track and could get 8 1/2 to 9 mins per tank to my Kyosho 777 which I can drive much harder and am only getting about 7 min run times, and the acceleration is outrageous, I need to tone it down a bit.
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Old 05-29-2008, 09:42 PM   #3
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Smaller re stricter is for more millage or detuning the engine, less air intake, if you were to change a 9mm to a 6.5mm it would make the tune fatter with less air intake.
I run a 7mm in my V-Spec.
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Old 05-29-2008, 09:50 PM   #4
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Bigger restrictor: More air, more fuel, more power, less mialage.

Smaller restrictor: Less air, less fuel, less power (Smoother), more mialage.
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Old 05-31-2008, 08:07 PM   #5
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Novarossi includes 4 restrictors with their engines

6.5, 7, 7.5, 8

I run the 6.5 restrictors because they give the best gas mileage and they actually make the truck a LOT smoother on the track. If you run a smaller technical track you'll want to run a small restrictor, larger tracks more flat ground - run a larger restrictor.

For most people, they can improve their lap times by slowing down to a smoother power band. Ryan Cavalieri runs a restrictor in his Pro Buggy RC8 for both the gas mileage and the fact he claims too much power is a bad thing. He prefers a smooth engine with good mileage and changes his restrictors for each track as it demands.

a 6.5 restrictor gives me about 70% of my actual power capability in my Nova and my lap times were much better than running with full power because I was able to control it much easier.
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Old 06-02-2008, 07:26 AM   #6
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I run a 7mm in my Go tech It does smooth out the power band. And going from the stock 9mm to 7mm can probably add 1-2 minutes to your run times.
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