Prechamber Mod "Flame" Front
Prechamber Mod "Flame" Front
Scott
there is no gain in changing the pre cups of your 617 A engine.
If your engine is 617 N/A u have a lot of things to change before reaching needs of best suited cups....
As of my experience the 605/6 injector wich uses the famous 315 nozzle can be used as drop in . Pre cup work best with around holes opened by 20/100 and the neck to 8mm , but this for turbo cups.... the na cups are too week to mod.
Good luck.