I think I read the Revmaster seats are chrome-moly, or at least chrome, but really all the old seats needed was a little nickle added to the mixture.
Funny how misunderstandings and rumors persist. Steve once told me the reason for adjusting valves was because the valves "stretch". Now, I know he must have known better than that, but he continued to pass misinformation like that along up until he died. As we now know, the hot valve would lift minute particles of material off of the valve seat with every contact, eventually causing the valve to settle into the seat further and further - which eventually caused some need to adjust stem/tappet clearance. Steve actually called this process "valve stretch". Solving that problem was accomplished a long time ago - adding nickle to the valve seat metal. ** I think those ORD heads, once Mark gets finished with his "air file" work will work just fine. Are the studs the same diameter? No matter, the old ones work fine. I like the Revmaster design though - adding another stud for better and more even pressure distribution. An added thought - I think Jeff brought up the matter of going back and re-torquing the head studs after having had the heads off. Enough time had gone by that I thought it would be a good idea to check mine, so I did, including taking the rocker assembly off to get at the one(s) underneath. Only one was very, very slightly not at the 18 ft. lbs. I'd left them at. So the old timer at the bug shop who I'd asked about that - he'd said "Naw, you don't need to." was correct. I didn't need to. ** At least we don't have to worry about the seats coming completely out like they do on some Jabiru models. I think Paul Hanson had the 3300 in his Tailwind. Gosh he hated that engine. Mike KSEE ____________________________________________________________ Affordable Wireless Plans Set up is easy. Get online in minutes. Starting at only $9.95 per month! www.netzero.net?refcd=nzmem0216
