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ChadS
12-01-2006 08:40:44
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Re: H rebuild,( Attn. ChadS ) in reply to Redblood, 11-30-2006 10:37:01
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I dont think you can get firecraters in the smaller bore sizes,, Best,,, bore the H block to fit in the C-175 (IH 350) sleeve and piston set. You get firecrater pistons,,, You need the 300 wrist pin bushings,, The H block can go out to the 350 sleeve specs (barrel diameter) but not to the 350 sleeve flange,, you have to cut the flange down to the H flange specs. That can be done in a lathe, and some patience, and some old sleeves to practice on. The 350 cam has more intake overlap Vs the H cam. The late cams were designed to pump the cyl pressure up as much as possible to make a little more cyl pressure. Also, a just a tad more duration, and lift,, but most changes were to the intake lobes. New manifolds are the ticket! Junk the old rusty one, Im thinking that the carb flanges are slotted, so it fits both carb styles on the same manifold. They are also casted better so flow is more than a stock H manifold would be. I would not do much to the ports if you got the 350 head, and still running stock stroke. The new style head, and the late cam grind is a good match for each other, they work well together. You can do a few more options to gain a little more cyl pressure and pick up more power, milling the cyl head, or offsetting the wrist pin location of the rods, and recutting the piston head so it fits inside the head more,, etc etc. After that recipe, your on to building the carb, speeding up the governor operation, and aslo the advance under the points plate in the distributor. Makes for a bad wolf in sheeps clothing. The low gear,,,, you wont be in lighter classes, you will spin it out, so you will be heavier for sure, just add weight, good set of tires, figure out where it likes it the best. ChadS
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