View Full Version : How Do You Remove The Restrictor
11-11-2001, 04:31 PM
IS IT HARD TO REMOVE THE RESTRICTOR AND HOW DO YOU DO IT
DO YOU HAVE ANT SITES ON HOW TO DO IT
WHERE ON THE ENGINE IS IT
11-11-2001, 05:10 PM
it is very easy. it is located on the neck of the carburator. to remove it all you need to do is:
1. take off the air filter
2. lockate the restrictor(small plack piece that sticks out the top of the carb)
3. get some pliars and pull it out
4.put the air filter back
5. richen carb about 1/8 - 1/4 turn
6. get it tuned better while you are running
Tazz R/C owner
11-11-2001, 05:18 PM
Q. I've heard that I can increase the power of my Traxxas Nitro Sport be removing the restrictor from the carburetor. Is that true? Will it hurt anything?
A. You can increase high-rpm performance by removing the restrictor, but there are some other effects you need to know about. When you remove the restrictor, you'll increase airflow through the carburetor. This makes the fuel/air mixture "lean", so you'll have to compensate by turning the mixture needle counterclockwise; this will increase the amount of fuel in the mixture, making it "richer". But you won't be able to adjust the low-end mixture, because the Nitro Sport's engine uses a fixed low-end needle. If you drive at half throttle or less for extended periods, you may overheat your engine due to the lean mixture. You should also consider the effect the modification will have on the truck's drivetrain parts; the Nitro Sport does not have a slipper clutch, and the increased power at high rpm will put extra strain on the gears. It's also important to note that you'll void the engine's warranty if you remove the restrictor. If you want to increase the engine's power and upgrade the rest of the truck to suit (and you're not worried about warranty issues), go for it. But if you aren't experienced with engines, and are hoping for "free speed" by popping out the restrictor, you're better off leaving it in.
11-11-2001, 05:25 PM
the point of having a restrictor is to even out the power band at low rpms so if you are doing mainly low end stuff you would want to keep it in, and if you are doing high end stuff (you should only hold the throttle wide open for about 3 seconds after you hear the motor peak (meaning it is not gaining much more speed)) you would want to remove the restrictor (if you insist on doing high speed runs for more than 3 seconds it is recommended you run rich)
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