Re: Aluminum Block vs Iron Block
Like Chris said.. you hear about the issues with rings seal as well as what it does to lash on your valve train. More thermal expansion issues and a chance for parts to not get along during that expansion.. binding parts, leaks, clearances, etc. I know I couple of guys that run an aluminum block SBC and they say more trouble than it is worth. The idea of loosing all that weight sounds great though. I think they are great for an LS motor that GM or one that Japan puts togther and worked out the bugs, but may be a hassle for the little guy where the adantages do not outweigh the headaches.
1973 RS Z28: 401ci Dart Little M, Littlefield 8-71 supercharger @14lbs boost, Callies Magnum crankshaft, Lunati Pro-Mod rods, JE pistons, 7.8:1 compression, AFR 227 Comp heads, T&D 1.6 shaft rockers. Reed solid FT cam (240/250@.050, .523/.542 lift, 112 LSA), QFT 750 carbs, Tremec TKO-500, Lemons headers, Moser 12 bolt, 33 spline axles & 3.42 gears