Hi Mark, That is interesting, I would have expected more !
What do you get flat out ? and what is the max revs in level flight I am surprised you are cruising at 2900 revs, is that normal cruise revs for a corvair? As it is a car engine, I would have expected that it could be propped to cruise at more like 3100 - similar to a VW. What is your max static RPM, if it is much under 3200, I would suspect that you are either over propped ( and looking at the pics that does not look likely ) or under carbed. it could be that blocking off your direct air intake was giving you an over-rich mixture - your CHT would possibly give a clue if that was the case. Pete > Now, today at 6000' and turning my Sensenich 54x52 at 2900 rpm as cruise, I > was getting 138 mph true > >
