Re: 1456/1256 engine diff

Posted by Chadd on December 10, 2004 at 07:04:52 from (155.92.196.199):

In Reply to: Re: 1456/1256 engine diff posted by Michael Earnest on December 09, 2004 at 21:06:48:

It might be able to be done,(if there is a will, there is a way. . .) but it would probably require an adaptor plate and new tubing and stuff to fit. It might even require different timing. Also, the 66 series tractors all used the 400 series engines (414, 436?, 466)where as the bigger 56 series diesels were the 407. The 407 has the pump mounted on the opposite side of the engine, so the pump could run in the opposite direction. If you still have the stock pump on it, you should be able to have the pump cranked up to get a little more smoke. Also, the 1456 has 10 to 13 psi of boost into the intake from the turbo where as the turbo on the 1256 only has 8 to 11 psi. Our 806 with the IH RD pump was cranked from 89 to 105 horsepower and our 966 with the American Bosch pump was cranked up to 110 from 100. However, just don't overstress the drive system. The 1456's rear end holds 5 more gallons of fluid than the 1256. My guess is that they strengthened something to handle the added power. Whatever you decide to do, good luck.

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