quadgod211 Posted October 27, 2014 Report Share Posted October 27, 2014 Got a set of 39pwks on gas already got power jets but what I need to know is how big of a deal is it to drill out dumps and convert to alky? Or should I just try and trade for some alky ones? Quote Link to comment Share on other sites More sharing options...
SOUTHTHIRTY Posted October 27, 2014 Report Share Posted October 27, 2014 Becafull if u drill, em to big...they will be trash. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted October 27, 2014 Report Share Posted October 27, 2014 I honestly have two sets depending on temps and situation I have options plus after running on alky it's nice to throw the gas carbs on and get rid of all the alky but converting is not terrible what combo do you have motor wise Quote Link to comment Share on other sites More sharing options...
J-Madd Posted October 27, 2014 Report Share Posted October 27, 2014 Takes just a few minutes to drill out. Some drill some other orifices but it's not necessary. You'll need to get bigger pilots and different needles also. And learn to tune alky. May need a pump and/or bigger bowls depending on the application. Quote Link to comment Share on other sites More sharing options...
quadgod211 Posted October 28, 2014 Author Report Share Posted October 28, 2014 I always ran lectrons when I was on alky but all my buds run pwks but didn't do there own conversion But I was scared of drilling to big and trashing them Already got power jets installed but will need bigger bowls The motor is a 521 supercub hope fully ported by currie motorsports or redline Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted October 28, 2014 Report Share Posted October 28, 2014 If they have dgh needles in them it should be good with those needles. Basically when you drill the dumptubes you might want to start as small as .116 and do very short passes checking for heat on the plugs. I just tuned a 521 supercub last week on the dyno. .116 was too lean so just jumped to a .122 and did the dumps and mains at .122 with the dgh needles they came with the carbs it was perfect after leaning the needles one clip. The 521 SC draws fuel well so the two that I know of that were converted used dgh needles instead of richer ones like a 421/465 cub would want egh or egl. Dont drill larger than .122. If it is lean on needle or main at .122 go to a richer needle. Quote Link to comment Share on other sites More sharing options...
SOUTHTHIRTY Posted October 28, 2014 Report Share Posted October 28, 2014 Mikuni carbs for the winn Quote Link to comment Share on other sites More sharing options...
SOUTHTHIRTY Posted October 28, 2014 Report Share Posted October 28, 2014 Interchangeable dump tubes Quote Link to comment Share on other sites More sharing options...
quadgod211 Posted October 28, 2014 Author Report Share Posted October 28, 2014 I can't switch from pwks I like em so much it influenced my sons name Kian lol I'm pretty sure it has dek needles...is like to just sell these and pick up some 41pwk already on alky but I'll use what I got for now and won't step over the .122 line thanks radar Quote Link to comment Share on other sites More sharing options...
SOUTHTHIRTY Posted October 28, 2014 Report Share Posted October 28, 2014 You names your son after a carb... kinda kool I must say Quote Link to comment Share on other sites More sharing options...
camatv Posted October 28, 2014 Report Share Posted October 28, 2014 just buy lectrons. 2 Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted October 29, 2014 Report Share Posted October 29, 2014 Nothin wrong with any brand of carbs IMO. Keihins with about a .120 drilled dump and mainjet with a couple different needles will be a good start. Maybe .118 with egl or egn needles. Those pwks will work fine. 1 Quote Link to comment Share on other sites More sharing options...
camatv Posted October 30, 2014 Report Share Posted October 30, 2014 alky lectron, install, set idle, ride set PJ race... done 1 Quote Link to comment Share on other sites More sharing options...
quadgod211 Posted October 30, 2014 Author Report Share Posted October 30, 2014 These are now for sale I picked up some 40pwks already on alky so I need to sell these 39 on gas with power jets $350 obo shipped Quote Link to comment Share on other sites More sharing options...
dozer Posted October 30, 2014 Report Share Posted October 30, 2014 any carb you choose, set idle, needle, pj race. Quote Link to comment Share on other sites More sharing options...
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