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ChadS
02-28-2005 16:17:35
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Re: Max bore of a straight H block in reply to AC, 02-28-2005 08:58:17
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Season starts either the last week of May, or the first weekend in June. Getting ready to build a 450 4-1/8 X 5-3/4. Tearing it down in the morning! The 460 is back in the main shop, the head is done, and Im ready to rebuild the ol 263. Im leaving it at 263 cubes,, I just finished up a IH 706 this week, gave it an inframe overhaul, and have had it on the dyno this week breaking it in. It also has a C-263 gas, new pistons, sleeves, head redone, tune up, carb rebuilt, etc etc. all I can say, is that the pto is slipping at 90 hp at little over 540. Its bone stock, and its good homework for when I build my 263 for the 460. I goofed up when I dynoed the 460, With the 6 cyl in the H rear end, at 540, the engine is only at 1800 rpm! on the 706, its like 2560 rpm at 540. when I seen the HP in the 706, I went back and figured the difference in the pto gearing ratios, and engine rpm speed. If I was to dyno the 460, using the H pto, and try to run the 2500 rpm, The pto would be over 800 rpm,, kinda fast to be spinning that pto, but how else can I dyno it? so, looking at rebuilding the drive shaft coupler, I rebuilt the transmission when I installed the limited slip differential. Bearings are new. Im thinking it will be around 105-110hp at 2500 rpm, which would be round 79 hp at 1815. Good lugging engine at 6,8 mph classes. Thats bout it here. Better get some good saftey glasses when grinding out that block! Cast iron slivers in the eyes, hurt like @$#!&*#%!!!!! Be good! ChadS
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