This problem with front bearings leaking has all come about from craming 61 displacement into a 40 volume case. Vacumes/pressures and gas velocities are great, but you end up with these wet nose problems.
I've seen PA51's that did this and Jett 50's and 60's.
Years back when 40's & 46's were the go on pipes I was running MVVS 40's on pipe. I took the piston & liner from the rear induction 49 and a stroked crank and made a 51. It leaked out the front bearing profusely. I tried sleeving the case so that I only had a .001" clearance between the shaft & case, but it still leaked. I tried various return grooves which helped but didn't solve it. I tried a sealed front bearing which did slow it down, but didn't stop it. Shortly after Randy came out with the PA51 so I gave up & bought one of those so I never got around to completely fixing it.
If you take an ST60, Stalker 61 or something along those lines and compare case volume with that of the PA's & Jetts you'll see what I mean.
Make sure you keep the bottom end of the case cool too. I've found this helps, even if only a little bit. Give it plenty of room and a couple of nostrel holes won't hurt.
On the Jett 60's I found using higher nitro & smaller venturies was a big help, naturally you'll need less comp too. This works as you are letting less volume into the case and hence the case pressures are a bit lower. This might not be much help with the PA as they typically use small venturies to start with.
Anyway, enough rambling, the courteous thing to do is to give Randy a chance to rectify it before broardcasting it to the world, I know I appreciate it if my customers do that. I had a customer with a Jett 60 that had a couple of problems, he told everyone that GMA & I were selling engines with a known problem, yet when the engine was put in someone elses model & proven to be perfect I got no apologies.
