ORIGINAL: FlyerJeff
Picked up a Saito 1.50 for my SS and a Pitts type muffler; the best I can do is 6-3/4 (Front of thrust washer to firewall) from the firewall, the recommended is 6-1/4, how big of a problem is this going to be if 6-3/4 is as good as it get???
Thanks!
Mine is also just about 6 3/4 inch from the firewall in order for the pitts muffler to clear the firewall. I have been told that having a little more distance between the prop and cowl provides better performance when the cowl is very large. Mine flies much better than I expected. You should be just fine. As a matter of fact my new GP Waco is being processed in the Tower warehouse as we speak and I plan to do the same thing and have about 10mm additional distance between the cowl and prop just like my Stearman.
Howard