Thesavagebeast-2017
New Member
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Hi I have just broken in my new piston and sleeve in my hpi 4.6 nitro engine and have got the high speed needle set by going up and down in straight lines but when I go round in circles clockwise there is no smoke coming from the exhaust and the engine sounds like it is screaming but if I go anti clockwise it does the complete opposite and goes much slower and has lots of smoke coming from the exhaust but if I drive back in straight lines it sounds like it should on hpi website (only been driving these for about 6 months)any help would be appreciated