Page 2 of 4 FirstFirst 1234 LastLast
Results 11 to 20 of 32
  1. #11
    New Member
    Join Date
    Sep 2017
    Posts
    19
    Location
    Ohio
    Tractor
    John deere

    Default Re: Yanmar injection pump modifications

    Quote Originally Posted by Bigkrank View Post
    If you are not worried about rules and have a machine shop just adapt an inline pump on it, Bosch A pump or whatever. This has been done for years. It has been about 10 years but was buying 3 cylinder A pumps on ebay with 8 or 9mm plungers, if I remember right, pretty reasonable.

    The guys who got serious with the 78 Yanmars split the blocks in half between the 2nd and 3rd cylinder if I remember right. kubota"s block & bottom ends are built much stronger but you need to convert to direct injection.

    You may also need a charge pump capable of something like 40-50 psi, at least you do if sticking with a cambox style pump.
    Ive thought about adapting a pump on it but I got to thinking about firing order and getting it time with the gear train but definitely I'll look in to it, how much do you think a cam grind would help me? I get so many ideas but I'm use to alcohol v twins this is a whole new world for me.

  2. #12
    Gold Member Bigkrank's Avatar
    Join Date
    Jan 2009
    Posts
    317
    Location
    NW Ohio

    Default Re: Yanmar injection pump modifications

    I have found you must go to water injection with a cam grind if you are making good power. You will likely need to check & modify other things when going to a cam grind. I quit answering my phone years ago when guys were trying to put in custom cams and were too stupid to check everything else out.

    Of course the cam grinder was telling them they could just put it in and go. Dummies couldn't figure out why the rocker rail nuts wouldn't stay tight.
    Several garden tractor pullers
    Kubota B2630
    Kubota ZD28
    Ford 655D backhoe
    Bobcat T190, various attachments
    Numerous Farmalls

  3. #13
    New Member
    Join Date
    Sep 2017
    Posts
    19
    Location
    Ohio
    Tractor
    John deere

    Default Re: Yanmar injection pump modifications

    Ok I think I have the fuel part of all this figured out, now I just need the boost to burn it. I had two ideas spring to mind and of which would be to bypass the governor by hooking up a throttle cable set up directly to the rack. (very carefully of course I know there fragile) if I could get it up to 5,000 rpm (4,400 makes 10-12 lb) I should be around 15-20 lbs of boost which would be ideal. (any above that wouldn't gain me much without a intercooler) would it still run properly if an adjustment screw was used to set the idle? Idea number two is to have a cam ground to move more air at the rpm I got. (assuming a cam could do that) I'm not sure if a cam grind could increase boost numbers or not. Or here is another one I just thought of, what if I where to drill a 1/4 inch hole in each governor weight to lighten them? I still have about a 1/4 inch of travel left on my idel screw so it should still idel down. Would I have to change springs as well? Any help is greatly appreciated

  4. #14
    Super Member clemsonfor's Avatar
    Join Date
    Sep 2009
    Posts
    8,479
    Location
    Greenwood Co., SC
    Tractor
    Yanmar YM2000

    Default Re: Yanmar injection pump modifications

    5,000 rpms!!!

    How long do you expect this thing to last?
    YM2000. MF dirt scoop,4' Jbar bushhog,boompole, LMC 12-16 disk harrow, 4' Atlas boxblade (with rippers). 1980 chevy K10,1990 ford ranger 2wd (285K miles),1997 saturn SL2 (twin cam!!),2001Toyota Higlander
    1986 Cobia 177 sunskiff w/1981 Johnson 60 hp
    1991 Javalen 17ft w/same year 150 Johnson GT
    Troybuilt 4 cycle & Echo 2 stroke,cold natured(need carb rebuild),MS390 Stihl, Northern tool pressure washer, mixes water into the oil in the pump(now dead, motor on a tiller). 5000 watt generator.

  5. #15
    Gold Member 4get gto's Avatar
    Join Date
    Jan 2010
    Posts
    286
    Location
    N.E. Pa.
    Tractor
    Yanmar 147D with loader,Woods mow,n machine 6210 ,Sears st10,Roper rt 10

    Default Re: Yanmar injection pump modifications

    I'd love to see that run! Don't know how close I'd want be.

  6. #16
    Super Member California's Avatar
    Join Date
    Jan 2004
    Posts
    9,033
    Location
    Sonoma County
    Tractor
    Yanmar YM240, and now just one YM186D

    Default Re: Yanmar injection pump modifications

    Is a scattershield (for the flywheel) included in the plan?

  7. #17
    Super Member kenmac's Avatar
    Join Date
    Feb 2005
    Posts
    7,364
    Location
    The Heart of Dixie
    Tractor
    yanmar 3110D

    Default Re: Yanmar injection pump modifications

    Quote Originally Posted by California View Post
    Is a scattershield (for the flywheel) included in the plan?
    LOL, Not a bad thought. That's a lot of mass turning 5 K RPM'S....
    I use to run a shield on my drag car (auto Tranny) It was mandatory !
    A Fredricks Yanmar 3110D
    07 Dodge 2500 5.9 Cummins
    Husky 372xp
    Husky 55 Rancher
    Maruyama trimmer
    Husky trimmer
    Redmax BP blower
    Toro zero turn
    North Star 4 K PSI pressure washer
    Honda 300 4 trax
    Yamaha Timberwolf
    liquid logic coupe kayak
    16' Tow Master Dump Trailer ,20' Yanmar Hauler

  8. #18
    Gold Member
    Join Date
    Nov 2004
    Posts
    461
    Location
    Nevada
    Tractor
    John Deere 970TLB, John Deere 125 automatic

    Default Re: Yanmar injection pump modifications

    I've always wondered how the 3T84 can be used with so many different tractors from the YM2310 all the way up to ( at least I seam to remember ) the YM3810 and have the same engine output such different HP's across that spectrum ?? Yes, I do some of them do use a turbo, some don't. The answer to this would be timing and fuel pump output + injectors ?? Exactly what Yanmar is doing at the factory to the different models of this same engine to raise and lower the HP's would be interesting to know. I think the max rated RPM in all cases is less than 2800, but I think the answer to what you are trying to do is somewhere in the answer to that question. @ 5000 RPM, I hope you have several spare engines to scatter in your experiments, good luck. I saw the end result of a Cat V12 generator engine that went over speed until it exploded, very dangerous for bystanders, could have killed someone. Didn't kill anyone, but sure messed up the room.
    Chris

  9. #19
    Veteran Member
    Join Date
    Dec 2013
    Posts
    1,821
    Location
    Southern Alberta, Canada
    Tractor
    4410 and F-935 John Deere, MF 245

    Default Re: Yanmar injection pump modifications

    Quote Originally Posted by clemsonfor View Post
    5,000 rpms!!!

    How long do you expect this thing to last?
    2 liter VW TDI's are redlined at 5-6000 rpm from the factory. 5.9 Cummins used as truck puller engines hit 5000+ rpm on factory stock bottom ends. I don't know how reliable a Yanmar is at those rpm's but it will be interesting to follow this thread and hopefully find out.

  10. #20
    Gold Member Bigkrank's Avatar
    Join Date
    Jan 2009
    Posts
    317
    Location
    NW Ohio

    Default Re: Yanmar injection pump modifications

    I made a jig to drill & lighten the weights on kubota governors. Also used heavier spring. I would start there first before hooking directly to rack, you will have idle problems.

    We were turning more than 5000 with 30-45 lbs of boost. Never saw a Kubota scatter myself, Yanmars not so much but with direct injection we are talking insane power & torque. Course stock parts will not work here. There are videos of these tractors on the internet.
    Several garden tractor pullers
    Kubota B2630
    Kubota ZD28
    Ford 655D backhoe
    Bobcat T190, various attachments
    Numerous Farmalls

Page 2 of 4 FirstFirst 1234 LastLast

Similar Threads

  1. Oil & Fuel yanmar new injection pump wont pump
    By Bthieman in forum Yanmar
    Replies: 15
    Last Post: 03-30-2014, 06:56 PM
  2. Yanmar injection pump question
    By JoeJChin in forum Yanmar
    Replies: 13
    Last Post: 01-31-2013, 11:19 PM
  3. r JD/ Yanmar injection pump question
    By JoeJChin in forum Parts/Repairs
    Replies: 1
    Last Post: 01-10-2013, 10:19 PM
  4. Yanmar 2210 Injection Pump???? Help
    By Marcus48 in forum Yanmar
    Replies: 3
    Last Post: 10-20-2012, 01:24 PM
  5. need yanmar injection pump
    By tcurrent 1 in forum Parts/Repairs
    Replies: 4
    Last Post: 05-31-2011, 12:21 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2017 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.