Some Progress: Heads Back From Machine Shop
Wednesday, June 9, 2010 at 5:44PM My race 1.3mm Cometic head gaskets have not arrived yet. It has been three weeks coming from The States . . . . . However, the cylinder heads are back from the machine shop after having the "humps" removed from the cylinder head chambers. This is the right way to lower compression on these 1UZ motors . . . as well as eliminate a source of detonation. The pent roof design, and some remaining squish around the cylinder, still allows good turbulence for fuel and air mixture.
The workmanship on the machining is "pretty good" -- which is as good as I can get them in Thailand. I went the extra mile and had them sanded and polished, in case I want to race on E85 some day (with it's low tolerance for pre-ignition). The valve seats will need to be redone.
The very good Aeromotive A1000 fuel pump arrived at last, along with thse very scarce -10 fittings
Reader Comments