Missing Boost Found

Zane made a connector tube (or fish as he christened it, as it ended up fish shaped!) so I set about fitting it. Its so tight that I had to remove the Procharger and fit it before putting it back on. Some of the bolts are almost impossible to get at so it took a few hours but it looks good done and should help to keep it cooler now I’m not drawing air from above the headers. TheFish.jpg While testing the brakes the other weekend I noticed some compressor chatter as it came off accelerator, so I decided to move the blow off valve to just before the inlet elbow to see if it helped. I found that it was opening as boost increased and dumping constantly. A check of the vacuum feed showed it to always seem to be in vacuum even when there was enough boost to swell the inlet piping. I swapped the dual piston valve out for the old single piston but that made no difference either. I kinked the pipe and got it to dump only when the throttle closed, so after a bit of experimentation made a restrictor with a piece of bar and a jubilee clip on the pipe. This allowed me to adjust it so it only dumped when it should so it’ll be interesting to see how much more performance I get. Old-BOV-in.jpg

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