banshee332 Posted August 27, 2013 Report Share Posted August 27, 2013 What size do you guys drill the dumps and mains to for a 10 mill cub. I have a set of 39 pwks that are drilled to 118. Is that enough? Quote Link to comment Share on other sites More sharing options...
LT ROOKIE Posted August 27, 2013 Report Share Posted August 27, 2013 A friend if mine is running 120 mains, 55-60 pilot on his 10 mill cub. I don't know his dump tube size. Quote Link to comment Share on other sites More sharing options...
LT ROOKIE Posted August 27, 2013 Report Share Posted August 27, 2013 A friend if mine is running 120 mains, 55-60 pilot on his 10 mill cub. I don't know his dump tube size. My 39 pwks have a 122 dump tube that were done by a&s Quote Link to comment Share on other sites More sharing options...
banshee332 Posted August 27, 2013 Author Report Share Posted August 27, 2013 Thanks, anyone else care to share Quote Link to comment Share on other sites More sharing options...
mx1986 Posted August 27, 2013 Report Share Posted August 27, 2013 I believe mine is .115 or .112 main jet but the dumps r .120 on my 38 pwk I think ur alright if ur main jet is smaller then ur dump Cuz ur main is only gona flow as much as ur dump allows. Quote Link to comment Share on other sites More sharing options...
J-Madd Posted August 27, 2013 Report Share Posted August 27, 2013 That might be ok on the dumps. YOu may have to drill out the power jets to feed it on the big end though. I think I ran 0.120" with 41 mm PWKs on mine. I run Lectrons on the motor I'm running now. Quote Link to comment Share on other sites More sharing options...
banshee332 Posted August 27, 2013 Author Report Share Posted August 27, 2013 What size drill bit is 120? Quote Link to comment Share on other sites More sharing options...
SlowerThanYou Posted August 27, 2013 Report Share Posted August 27, 2013 What size drill bit is 120? .120 Quote Link to comment Share on other sites More sharing options...
SlowerThanYou Posted August 27, 2013 Report Share Posted August 27, 2013 We run a .120 dump & .120 Main with a DGH needle with bored 39 PWKs on our 643 DMX. Quote Link to comment Share on other sites More sharing options...
J-Madd Posted August 27, 2013 Report Share Posted August 27, 2013 I think its a #31 index bit if this chart is correct. http://en.wikipedia.org/wiki/Drill_bit_sizes#Metric_drill_bit_sizes Quote Link to comment Share on other sites More sharing options...
Guest JohnTabata Posted August 28, 2013 Report Share Posted August 28, 2013 Yes a #31 drill is .120 Quote Link to comment Share on other sites More sharing options...
bada450r Posted August 29, 2013 Report Share Posted August 29, 2013 Thanks, anyone else care to share i run 118 all the way thru on my 4mil cub...thats at sea level Quote Link to comment Share on other sites More sharing options...
dozer Posted August 31, 2013 Report Share Posted August 31, 2013 I know asked about a ten mil but around a 1000ft asl .118 and 55 pilots on my 4mm cub Quote Link to comment Share on other sites More sharing options...
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