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Old 12-17-2004, 01:19 AM   #1
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Default Carb Restrictors - Do You Guys Use It

on newer engines, they seem to all have carb restrictors. do you guys use it? is it illegal (roar) to take them off?
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Old 12-17-2004, 12:50 PM   #2
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no its just something to help people new to rc cars handle the power. once they are comfortable driving it stock they just take out the restricter. i used one for a while, no shame.
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Old 12-17-2004, 03:24 PM   #3
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the restrictors the carb comes with is so the carb will pass tech for roar sanctioned races for sedans. 5.5mm restrictor.
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Old 12-17-2004, 03:24 PM   #4
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on which motor was it that you took it off?

i have a rex rer12s3
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Old 12-17-2004, 06:05 PM   #5
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Quote:
Originally posted by jwf_frani
the restrictors the carb comes with is so the carb will pass tech for roar sanctioned races for sedans. 5.5mm restrictor.
Correct, and its the same with IFMAR, EFRA, FEMCA, BRCA ...
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Old 12-18-2004, 01:07 AM   #6
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yes I use the carb restrictor when I break in my engine, after that I remove it. When I go racing next year I will keep it with me (as it would seem a requirement for some authorities) but once you drive the car without it you wont want to put it back, in my case removing it gave me at least twice the speed overall
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Old 12-18-2004, 01:13 AM   #7
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what about fuel consumption? will you still make 5 minute pit stops without it?
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Old 12-18-2004, 05:35 AM   #8
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What happen if I don't use the restrictor ( light green rubber with two black o- rings ) ??

Increase top speed ? Fuel consumption ?



I always thought the cone shape has something to do with air flows entering the carb.
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Old 12-18-2004, 07:08 AM   #9
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Restrictor Off: Increases top speed because theres more airflow entering the engine but also will wear out the motor abit more

Restrictor On: Decreases top speed because of less air flow but it will not wear out the motor as fast.....


as for fuel consumption ive been running my engines without the restrictors and i still get AT LEAST 5mins per tank.

Hope this helps
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Old 12-19-2004, 03:07 AM   #10
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i think keeping it in also helps the ease of tunning the engine.
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