Hey guys, I have a 2002 MCS JCW with a 17% reduction pulley, RMW cam, scorpion headers with a 200 cell high flow cat, 550 CC injectors, madness intake with cowl mod, and an RMW custom tune. I am looking to get a HFS-3 aquamist system but am unsure of what jet size to use. Any recommendations or ways to calculate what to use? Thanks a lot guys!

 

there is a way to calculate, but I forget how... Howertonengineering.com has the idea for what jets to use. since your not tuned for it, if your between sizes, I would pick the smaller one

 

I'm waiting to get on the dyno with Jan and get a new tune, but I have all that you do, plus the head and bottom end and I'm using the .8mm jet for now. There is a chart on the Howerton website and in the manual.