ryanf117 Posted March 9, 2008 Report Posted March 9, 2008 so if im run 21cc domes, 40 over pistons, boyesen reeds, fmf ex,fmf jeting kit with 260 jets and k&n filter what type of gas and mixture sound i be doing thanks Quote
bansheejoel Posted March 9, 2008 Report Posted March 9, 2008 (edited) so if im run 21cc domes, 40 over pistons, boyesen reeds, fmf ex,fmf jeting kit with 260 jets and k&n filterwhat type of gas and mixture sound i be doing thanks run a 32:1 mixture bro. 16oz of oil to 4 gallons of gas. Dont quote me but i think anything over 150psi of compression you need atleast 50/50 mix. anything under that any premium gas should be fine. Edited March 9, 2008 by bansheejoel Quote
ryanf117 Posted March 9, 2008 Author Report Posted March 9, 2008 see but i thout the mixture 24:1 was fine 32:1 is a hell of a lot less oil i should be fine? dose anyone also know what compresion im at 21cc domes and 40 over pistons Quote
yam_fan Posted March 9, 2008 Report Posted March 9, 2008 32 to 1 is a good safe mix with premium fuel, I know a couple of people that run 40 to 1 he has his own shop so he changes pistons alot but he gets them for half what we pay Quote
ryanf117 Posted March 9, 2008 Author Report Posted March 9, 2008 32 to 1 is a good safe mix with premium fuel, I know a couple of people that run 40 to 1 he has his own shop so he changes pistons alot but he gets them for half what we pay so 93 octan with a 32:1 race oil is ok then Quote
yam_fan Posted March 9, 2008 Report Posted March 9, 2008 so 93 octan with a 32:1 race oil is ok then that is always a safe mix that is what I am running but after my pistons get broke in I am going to 36 to 1 but you might rather be safe than sorry and you wont have to run race fuel tell you drop the domes to 18 or 19 cc cant remeber Quote
bansheejoel Posted March 9, 2008 Report Posted March 9, 2008 (edited) yeah the clymer manual says 24:1. hell i dont know anyone running that mixture that is rich as hell. you dont have to run race gas! it all depends on how much compression you have, one person with 21cc domes could have say 150 psi at sea level but someone at 5000ft could have 135psi (i know its probaly not exact its only a example). i know guys that run 50:1 with amsoil dominator depends on what you feel comfortable with but 32:1 is a good overall mixture. do a search on the hq and/or go to noss's website they have a compression chart. Get a compression tester, thats the only way you will know exact numbers. Edited March 9, 2008 by bansheejoel Quote
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