JD stock bore & stroke January 21, 2009 04:00PM
I am wondering what the stock bore and stroke is for different JD motors. The 619, 531, 466 and 8.1? Thanks
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Re: JD stock bore & stroke January 22, 2009 07:02AM
466=4.5625x4.75,531=4.75x5.00, 496=4.56x5.06, 619=5.125x5.00; 619 w/5.5 pistonx6.0 stroke=855; IF LOOKING FOR TORQUE, NOT RPMWinking
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Re: JD stock bore & stroke January 23, 2009 02:11AM
So if you have nothing and are going to start on a superfarm, 640 cubes, what would be the best? The 619 is close already, but do you need more stroke for torque? Also do the sbjd recover the rpms better? Thanks for the info.
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Re: JD stock bore & stroke January 23, 2009 02:37AM
At 9300 lbs, you are going to be fighting a battle to get much moveable weight with a bb deere chassis. Small blocks readily can get to 585, can get pricey to go into the 640 cu in range. If set on Green, I'd recommend hitting the pits at the NFMS in Feb. Most pullers will share a lot of their experiences with you. Super farm is a torque class, big motor, small charger chocking rpm down. I'd say those that can make the most torque in the 2800 to 3200 range, and hold their gear on a given track, are going to be in the top of the class. Pullers are saying the Gordyville track was a strong track, check the results for the multiple sessions of super farm, and compare the small block versus the big blocks. No matter what you build, the clutch, pump, charger, and tire/wheel expenses are going to be similiar. Engine work, head work and trans modifications can easily run into the 50,000 range, without much trouble. I don't now if either's built a bb deere or not but someone like Don Slama, or Greg Lamb are both approachable. Christiani of the Got to Go Pro-stocker has extensive bb deere pro-farm and pro-stock experience, as well as an extensive background in the administrative, promotional side of pulling. All will be in the pits at Louisville. Good luck.
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BBJD January 23, 2009 02:46AM
Don't believe everything you hear. I got my 5010 down to 7900# with driver and cage using the 5010 rearend and stock 531 block. Lots of movable weight at 9300#!!
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Re: BBJD January 23, 2009 04:13AM
May I ask what all you had to do to get it so light. How many extemes did you go to? Some of the light super deere have to do a bunch. Thanks
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Re: BBJD January 23, 2009 04:41AM
To do that aluminum is your friend. We used the stock 5010 sheetmetal. Aluminum frame rails, deck plates, front pannel, oil pan (i believe from a bulldozer), side pannels, small aluminum radiator and weight brackets. Only 4 forward gears (one pit and 3 pulling speeds) and one reverse left in the transmission, Aluminum core flywheel. Light steel tubing front end. 18.4-38 super all traction bias tires. Had all of those cast nubs milled off of the axle housings. Also cut about a 10in. by 10in. hole in the bottom of the bell housing. This was done primarily for clutch adjustment but also lost a lot of weight. Any other Questions feel free to e mail me.
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