Turbo vw engine engineers: I just read on krnet about a turbo'd vw motor lifting a head at 3600rpm, 36" manifold pressure.
My vw motor has the revmaster turbo setup, draw through carb, etc. No wastegate. 20 minutes running time, not yet flown. I once asked a turbo guru once about adding a wastegate, he said "no, the waste gate won't last in this application because it may be exposed to continuous duty" (this waste gate spills exhaust from the exhaust turbine inlet). In continuous operation the valve would fail. So here's my question: How about welding a "T" to the exhaust header near the turbine inlet: a place to attach a 1/2" tube. route the 1/2" tube around the engine once (to cool it), then use an automotive EGR valve at the cool end of the tube to spill exhaust (inert gas) into the carb inlet to lower combustion pressures. Adjust the motor on the EGR valve to operate pressure (from the other side of the diaphram) and set it to open at 32" manifold pressure.. Or it could be operated electrically by a pressure switch on the intake manifold set to 32". The switch could light an idiot light and operate the EGR valve. What do ya think? jg
