Pete, You need to tap the manifold pressure sensing down stream from the carburetor and before the air-fuel stream splits before going to the left and right cylinders. I welded a pipe bung to the outside wall of the steel intake pipe, then drilled a #60 hole in the intake pipe to get access. Make sure there are no burrs or shavings in the pipe. After all the welding and drilling, I had the steel pipes ceramic coated at Jet Hot. Fittings are NPT and flexible hose to the actual sensor. Pete Bengalis recommends a very small hole in the intake manifold pipe in case the flex hose or some other component fails; this will allow the engine to continue running. The small hole also helps to even out pulsations going to the sensor for smoother readings.
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA smw...@md.metrocast.net ------------------------------------------------------------------------- I am installing a manifold pressure gage and would like some suggestions for locating the source. I have the HAPI intake ducts with an aerocarb. I am considering welding (or brazing) a half couple to the intake tubing but where? Thanks, Pete Gauthier Woodburn OR
