Re: Re: Re: Re: Re: H Rebuild

Posted by Dr.EVIL on July 25, 2003 at 09:43:39 from (12.4.181.2):

In Reply to: Re: Re: Re: Re: H Rebuild posted by SCCA SOLO on July 24, 2003 at 19:49:33:

I have an IHC reprint of the C-152 engine service manual from back in the 1940's (I used to work for IHC @ the Farmall Plant from 1976 to 1981) They have HP & Torque dyno charts in there. The H engine makes around 240-250#/ft of torque at around 1000 to 1100 RPM. Well above a car engine's 1 #/ft per CID average. And that was with the poor low octane gas and required low compression. Steve's right, those engines are made to lug, and pretty darn good at it too. Cam timing is pretty docile. The intake ports in the head are siameased, and with the firing order, one cylinder pulls an intake charge then it's neighbor it shares the port with takes advantage of the velocity already in the manifold. The valves are kinda small for the bore diameter, and there's a HUGE combustion chamber with the valves at the very top, so about all You can do is plane a little off the deck, .030" to .050", put over-size pistons & sleeves with pop-up domes on the pistons (yes, I know they kill flame travel, but they're the only way to make compression), and run the engine a little faster than the 1650 they're rated at, I personally wouldn't exceed 2000 without special rods. Oh, Magniflux the rods & I'd use ARP rod bolts too, Those H's have been known to throw a rod every now & then. You get real serious, there are places that will grind You custom cams for pulling. Don't worry about rod ratio, Stock Your already at 1.88, Way under square engine with Really Long rods! BTW, Where You going to School? FWIW, My Son wants to put a Ford EEC-IV EFI set-up out of a Mustang on a Famrall M.

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• Re: Re: Re: Re: Re: Re: H Rebuild SCCA SOLO 11:54:26 07/25/03 (0)

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