Re: bore and stroking 1948 john deere model b.

Posted by Chris-se-ILL on December 08, 2003 at 10:13:30 from (216.174.170.159):

In Reply to: bore and stroking 1948 john deere model b. posted by leon on December 05, 2003 at 16:22:39:

Boring the cylinders will not give you "that much" power (volumetric) increase! And, stroking will most likely weaken the crank (No, stroking is not the same as grinding .060 undersize, which does not weaken the crank).

There are things that I have helped do to JD "G" engines for the purpose of increasing horsepower in antique pulling tractors... but I do not know if the same things are applicable to the JD "B"! Such things as... increasing compression by doming (adding material to) the pistons (if they are aluminum pistons); increasing valve head diameters, while modifying the seats and ports behind the valves (thus increasing air flow), cylinder boring the common intake throat of the head to a larger diameter, matching and modifying the intake/exhaust manifolds.... things that are experimental but proven to work.

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• Re: Re: bore and stroking 1948 john deere model b. Brad Rostron 13:06:43 10/01/05 (0)

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