These are the parts of a bosch system used by saab to control boostpressure. It's called APC or automatic performance control. We're going to addapt this to work with the higher boost our engine is going to see. It's senses detonation and reduces boost until detonation stops. So at all times you're engine is making all the power it possibly can.

new engine update

Finished fabricating the intake and exhaust manifauld. About 40 manhoures in this. Made some biginners mistakes though, next one should be easier. Welding stainless is harder then welding normal steel too. It twists like hell when you heat(weld) it.

Nice view on the heatexchanger, air goos through the waterjacketed intake plenum and is hence cooled. Warmer water is used to heat vaporiser voor liquid propane (fuel)

We bought the cheapest, lightest and smallest alloys we could find but ofcourse they didn't fit a beetle, almost nothing does. Instead of redrilling the drums we chose to redrill the rims. Filled in the hollows at the back and drilled holes in the right spot with the right bolthead radius