Posted by RodInNS on October 31, 2009 at 05:45:03 from (216.118.158.123):
In Reply to: Re: Grinder mixer posted by JayinNY on October 30, 2009 at 20:20:57:
Yes, the rotary pumps can be turned up too, but not as easily. Those require the removal of the side plate, then you've got to get some small wrenches and reach inside, loosen the end plates on the cam ring I beleive... give it a bit of a turn... then retighten. I've never played with one of them and it's a long time since I read the pump theory on that part of the pump. I just know it can be done... Beyond that... I don't think I'd bother turning up either the 4610 or 5610. The 201 is probably near the top of what it's going to make without a turbo. The 256 could make a bit more tho, but it would probably be somewhat less efficient. The 7710's were popular for winding up because they had the turbo. They could scavenge the heat and make enough boost to burn a fair bit more fuel... and they generally had a driveline that would take it fairly well provided you didn't abuse the clutch too much. The 4610 would take a bunch more power through the tractor I think... but you'd just be limited in what the engine could make (it would make more smoke than power)... and it would constantly be running hot as they didn't really have enough cooling system anyway. That was one other thing that the 7710 could generally ~manage~ fairly well.
I'm toying with the idea right now of turbocharging a 201, probably with many of the 7710's internal components... then adding some serious fan capacity. This would be for a 3930 chassis; the idea being it would be pushed to 65+ hp. I've also toyed with the idea of going even more with the 201... letting the pump out to maximum, which would put the engine in the 100 hp bracket, then installing it in a Ranger. I just don't know how the 3 cylinder, non nitrided crank will last at that power level... I think that would make a 30-35 mpg Ranger instead of a 15-20 mpg Ranger.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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