When you guy's say to upjet 15% say, are you referring to orofice diameter or area? ie:, you have a 100 jet and go up 15%, does that mean a 115 jet? + 15% diameter? Or are you upping the fuel flow, ie. area of orofice? That would be approx 108 jet.
if the jet was 100 and you were upjetting 15% you would use a 115 jet, and if the jet was a 50 jet you would use 58 jet etc etc
Thanks mate, just curious about the measuremant method. Fyi, if you had a 100 jet and wanted to run twice as rich, you would run a 140. Not a 200.
yes but the size of the hole is never the focus of attentioin with most people.. hence we use the number percentage.
also guys when you say 70 kit-15% exhaust-8% etc does this mean if i had a 70 kit and an exhaust i upjet 23%ish for example??? lol what would you recommend for my setup? cheers dec
percentage isnt a science.. just friendly advice. point is its a place to stasrt then figure it yourself..
Start rich, It's better to work you're way down on jet size than work you're size up in squeaked pistons!
when it says 15% for a pipe or whatever.. you dont add them all together. id be running a 300 jet by the time an engine is built.. if your fitting a 70 kit then go with the rough upjet from stock for that with a pipe.. its not correct.. its just a GENERAL recomendation.. gotta try a few an note the diff
In jetsking we talk jet sizes not % so we will say go up 10 on it But then again i will only gibve out a rough starting point unless i am there and doing it myself
