Re: Farmall Tractor Pulling

Posted by ChadS on November 04, 2004 at 05:45:40 from (66.228.96.139):

In Reply to: Re: Farmall Tractor Pulling posted by Migraine on November 03, 2004 at 21:10:50:

I have been pulling my H farmalls for almost 15 years now.. From stock engines, to big stroker engines in this series of red power. Built them from the ground up in our shop. If your H still has sleeves inthe block, just bore out the sleeve to 3-9/16. Thats all a Super H is, is a bored out sleeved H block. The 169 head bolts right on. Now lets talk cyl heads for a minute,, ya all know about the blocks now,, There was several different head castings from 39-52. The best "Older cyl head" casting was the 8043D. These were the high compression gasoline head. They had the old compression chamber that used stepped head pistons in stead of firecraters. When the Super H came out, there was changes made in the cyl head, and the pistons used. See, now IH had the new Firecrater piston design, which needed a casting change in the compression chamber for 2 reasons, 1, to make room for the piston, so it does not slap the head. 2, the fire crater piston has a deep crater in the one side of the piston head. they create a swirl burn pattern in the cyl and the head was relived along the side of the chamber, to enhance the effect. They breathed alot better upon the 4 stroke cycle. With this change in engine design, they knew the old H cam would not help with torque, so they redesigned the cam grinds too to match the new engine charateristics. Also, the intake runners, are much straighter thru than the older 8043d castings. On bout allthe Super H C-164 gas engines, you found the 8043DD, which was the high compression gas, compatible for Firecrater pistons. These heads were exactly the same casting, as the 361479r (300-350) C-169-C175ci. Just with the old casting number, only "DD" instead of "D". The chambers are smaller in CC's, the ports are better, and you can use the newer firecrater pistons. ChadS

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