New life for an old 340 (stock stroke)
Let me say that I am relieved and super happy with the results. No smoke, no leaks, no bad noises and pretty good power exceeding my expectations. A 650 cfm carb with an 1" HVH four hole tapered spacer was THE perfect package. I tried a 750 XP and it lost almost 20 tq @ the start of the test compared to the 650 with about a 2 HP advantage at the peak. Manifold vacuum was 9" at 1000-1050 rpm. Hot idle oil pressure and I mean hot after repeated pulls to 6900-7000 rpm was 30 psi with a nice and steady trend to 60-70 psi in the upper rpm's. Valve lash was great as in did not move after my initial cold settings. The only thing I didn't do yet is a cranking compression test--but I will. J.Rob
Let me say that I am relieved and super happy with the results. No smoke, no leaks, no bad noises and pretty good power exceeding my expectations. A 650 cfm carb with an 1" HVH four hole tapered spacer was THE perfect package. I tried a 750 XP and it lost almost 20 tq @ the start of the test compared to the 650 with about a 2 HP advantage at the peak. Manifold vacuum was 9" at 1000-1050 rpm. Hot idle oil pressure and I mean hot after repeated pulls to 6900-7000 rpm was 30 psi with a nice and steady trend to 60-70 psi in the upper rpm's. Valve lash was great as in did not move after my initial cold settings. The only thing I didn't do yet is a cranking compression test--but I will. J.Rob