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ChadS
04-05-2004 08:30:10
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Re: Re: Re: Re: Re: JD G tune up in reply to G-MAN, 04-05-2004 07:47:38
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You are correct! JD are limited for performance options, and you have to do with what you have most of the time. On this Ol G, it was in poor running condition, carb was so off, it was popping through the carb. I thought it was ignition, but after going through the carb, and the ignition, the carb was the problem with the popping. It was too rich, but after it was all tuned up, it had a very different running characteristic. it would lug!! Now I know about what people think about "Spiking the dyno" but that is where I tune the engine, when the engine lugs, I set the carb, then rechecked the 540 rating, 50 hp, but, when you "Spike it" it would be in the high 90's before it dropped off. I say, that reading measures how much of a torque curve the engine has. or lugging power. Anyways, the carb would deliver a beautiful coca brown plug color, so it gets lots of fuel, the plate I made, just acts as a "churner" to speed up air flow. just something to change the way the air is delivered in to the intake, it did get stronger, not much, maybe 3 hp at 540, she runs very strong I think, and starts up cold without choking it, stays running the first crank, I had an A years back, it was a stocker, and when I bought it, it had a B carb on it, and would run at 44 hp with the B carb, time went on, I seen it was not for an A, so I changed it to the A carb, rejetted to the same as the B carb, and lost 5 hp. could not get it back. This was years ago, before I knew what I was doing, (my own opinion on that ) LOL it always stuck in my mind that it did that with the carb. Just about the only way to check, is to try it again sometime, and see from there. Have you ever played with a 730? Chad
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