I am starting to look at building a JD 2 cylinders diesel, don't know much about them and have found that there is not much info out there and a lot of is is conflicting. I was hoping to get some help to straighten some of it out. I would really like to be somewhat competitive at 6500# 3 mph. There are some big cube olivers and molines that run well, but I think 3 MPH will even it out some. I know that an NA diesel will not make as much power as gas and they are heavier, but my 20 month old daughter loves to watch youtube videos of tractor pulling and how can you argue with a baby that wants to "watch smokes" with daddy when I get home from work. She takes a special interest in the Full Strut and Super Strut videos. I have probably watched them 100 times with her. No complaints.
Anyhow here is what I know is fact:
730D Nebraska test 594 56.66 HP 7899# with 15.5-38 and operator
830 Nebraska test 632 72.8 HP 8729# with 15-34 and operator
Now comes the claims I found and need some help with:
R/80/820/830
There are big bore blocks (8") for 820/30. 8" bore X 8" stock stoke 830 would be 804ci. (where do you get them?)
With a little work they can be lightened to 6500lbs or less. (hard to believe)
R missing center main and breaks cranks at 100 hp (believable)
Easy to get an 830 under 7500 and over 100 hp (believable)
70/720/730
70 does not have creeper, to fast to pull (believable)
730 10% over rpm and full rack will make 97 hp (hard to believe)
Can't stroke them due to hollow journals, if you do they break (believable)
Run a Cummins piston offset ground crank with welded G rod ends on the crank @ 3.300" journal; bushings in the piston (maybe)
I think some of these claims are hard to swallow am I on the mark with my comments? Who are the better shops to work with for the JD diesels?
Anyhow here is what I know is fact:
730D Nebraska test 594 56.66 HP 7899# with 15.5-38 and operator
830 Nebraska test 632 72.8 HP 8729# with 15-34 and operator
Now comes the claims I found and need some help with:
R/80/820/830
There are big bore blocks (8") for 820/30. 8" bore X 8" stock stoke 830 would be 804ci. (where do you get them?)
With a little work they can be lightened to 6500lbs or less. (hard to believe)
R missing center main and breaks cranks at 100 hp (believable)
Easy to get an 830 under 7500 and over 100 hp (believable)
70/720/730
70 does not have creeper, to fast to pull (believable)
730 10% over rpm and full rack will make 97 hp (hard to believe)
Can't stroke them due to hollow journals, if you do they break (believable)
Run a Cummins piston offset ground crank with welded G rod ends on the crank @ 3.300" journal; bushings in the piston (maybe)
I think some of these claims are hard to swallow am I on the mark with my comments? Who are the better shops to work with for the JD diesels?