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Old 02-12-2013, 09:15 PM   #1
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Questions?? Extra hole in HPI Nitro Star T3.0 Carburetor?

Anyone know if there is supposed to be second hole in the carburetor?? Check the pic.

Thanks.
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Old 02-12-2013, 11:18 PM   #2
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Quote:
Originally Posted by Lt819 View Post
Anyone know if there is supposed to be second hole in the carburetor?? Check the pic.

Thanks.
The hole is for idling....... somekind of fool proof design for nitro rc beginers.

( Long time ago, .... 1994, I enlarged the bore diameter inside my kyosho standard engine. I carefully enlarged the bore diameter inside carburator's neck which is connected to crankshaft opening. I also removed the baffle / restrictor inside the standard pipe. The result was faster acceleration, more rpm and louder engine ).
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Old 02-13-2013, 08:31 AM   #3
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Are you sure thats what it is.. because i know theres supposed to be one 1-2mm gap for idling but theres a secondary hole which i think is the slider for the idle screw which is visible when the carb is closed for idling position so once again when the carb is closed for idle position 2 gaps are present, still wondering if this is normal. The idle gap is in the top left corner (which cant be seen in the picture) and this mystery gap is on the right side of the carb in closed position.

Thanks for any assistance in this matter.

PS. Its a rotary carb.

Last edited by Lt819; 02-13-2013 at 08:46 AM.
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Old 02-13-2013, 11:19 AM   #4
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HPI tech said it was normal - air fuel mixture. Hobby shop guy says its defective (but i think hes an idiot.)
asw7576 says its normal. When i pulled it out of the box i thought it was defective, so thats 2v2.... It's winter time so i cant really start it up... Plus im waiting for tools... So what is it?? Plz help me!
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Old 02-13-2013, 01:33 PM   #5
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That's the slot for the idle screw. In a rotary carb the idle screw not only sets idle speed but also holds the barrel in the carb body. Nothing wrong with your engine.
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Old 02-13-2013, 01:43 PM   #6
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Alright, thank you sir! I just needed reassurance because ive never seen this before.
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