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ChadS
12-12-2007 16:21:18
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Re: CHADS I NEED SOME ADVICE in reply to smdv806, 12-12-2007 14:24:17
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221, and the 263 had the same bore at 3-9/16. Was mentioned before that something about the rear main seal or or the rear main is smaller in the 221 which gives it away that its a 221. The 221 has a taller compression height piston VS the 263 and up engines, same pin, same rod as the 263-301, its like .312 difference the 221 piston is VS the 2.02 compression height of the 263-301. Being its a combine block it should be sleeveless, like the 301, and can go to the 301 bore.
You could put the 301 piston in the 221, the piston would be below the deck of the block .312 or what ever the difference is,,, Put you one big turbo, or two small turbos, to stuff the cyl and make one heck of an explosion, if ya can lite it and make it exhale without overheating. Another option, is to put a diesil head on it, and convert it back to gasoline, with decompressed diesil pistons. Spark plugs where the injectors would be,, have intake and exhaust headers built, incorperated with the turbo,and what ever big carb you choose to run. Diesil heads flow more air than the gas heads, and could use the diesil exhaust manifold and build a custom intake to cut the work down to convert it. Oliver pullers do it all the time, by taking advantage of the high cyl pressure of the diesil, and making one heck of a gas burner. Maybe the diesil pistons out of the 282, which with the diesil head, and the shorter compression height would still start up OK, low cyl pressure till the turbo kicks in, and stuff it with as much boost as it will hold, providing a fuel can lite it,, but boost pressure can be cut back to decompress the cyl to lower the octane requirements.
Old super stock puller lived close by years back, had a 730 case, with a couple of turbos on it,, diesil,, took 4 minutes for the turbos to spool up and get the air moving, and it launched, but when it reved up and it took off, it was out past the full pull mark everytime. Happened to ask him why it took him so long to get going of the line, and he said he just got done cutting a half inch off the pistons,, and now the turbos had to go bigger to pick up the pace to make up the difference. But he did get it ironed out over time with playing with different hair dryers, and pressure. It took him bout a minute to a minute and a half to get it reved up and launched. When it ran it had red fire out the exhaust pipe that extened past the tip of the stack about 6 inches, like a blow torch for exhaust. That was probably 20 years ago, Was always pulling against a fella named Hawk with a couple of Molines.
Anyways, you could decompress the gas compression ratio, and keep adding boost pressure to make more with less, and if it ever becomes an alky burner,,,, 500 hp could be a walk in the park out of it with a turbo on alky, maybe 350 on a higher octane fuel. Best get a MSD, a couple of differet distributors with different advance curves, good plugs, and open up the head on the exhaust side of the gas head. But the engine could be done for a good rebuild and keep going with cost efficent parts.
So many options to choose from. Hope this helps, ChadS ChadS3@hotmail.com
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