You sent me a PM but can't get PM's back???? so I'll try here.....
Yeah....they're great up to about 80 psi they are 1 to 1 and about (3200) rpm. After that drive gets away (the gate on the secondary is too small).
At 5500 full load I've seen drive as high as 150lbs.....:nail: Need a lot more charger now.
Did I see your tearing down already? A punched out main bearing??? Even after the abuse and RPMs I've been putting to mine, the mains always look perfect. The rod bearings are sure getting stressed though.
Chris