sheerider20 Posted November 26, 2009 Report Posted November 26, 2009 (edited) i have a jetting question i have the cylinders out to be ported right now an i need to find out what size jets i will need. i am getting a dune port but not all out cuz i want to be able to use my cylinders next year when i go to a 4mil. but my mods are pro circuit pipes, +7timing, 19cc domes, trinity cool head stage 4, k an n 6" pods, no air box, no outwears, im curently running 27 pilots, 300 mains, any an all help is appreciated. elevation is 500ft above sea level, an temp is running 40-60 degrees.. Edited November 26, 2009 by sheerider20 Quote
GrMeyer Posted November 26, 2009 Report Posted November 26, 2009 I would bump the mains up to 330's and work around there. I was running 290's before I went to a dune porting and Im now running 320 mains but going to bump it up to 330 due to colder weather. Quote
sleeper06 Posted November 27, 2009 Report Posted November 27, 2009 If you can find out durations on exhaust/transfer it would help better.I have ran all the way up to 380/390 on dune port motors 30 pilots.See what you can find out Quote
sheerider20 Posted November 27, 2009 Author Report Posted November 27, 2009 the guy is porting it for my pro circuit pipes i know it wont pull on the top end as hard as it could but i am gunna put cpis or shearer inframes on next winter with my 4mil build Quote
sandman81 Posted November 28, 2009 Report Posted November 28, 2009 the guy is porting it for my pro circuit pipes i know it wont pull on the top end as hard as it could but i am gunna put cpis or shearer inframes on next winter with my 4mil build You should ask the guy who is doing your port work, he should have a better understanding of you should need. X2 on grmeyer Quote
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