1HD-T injection pump

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

You want a longer stroke for the same duration? Should be able to adjust that with pre stroke shimming.. Not sure... ? We have all the tooling and a lathe to do that kind of thing. Im sure its possible.
Ill be learning inlines in the next few days with a p7100 cummins pump. Should be fun.

...via IH8MUD app
 
Sorry guys, I thought we had that machine for the dual stage, but it was a common rail machine for the duramax & fords.
I asked the owner about the vw and toyota dual stage injectors, and he said typically they replace the nozzles and clean them and just test the main injection stage.
I was looking at the dual stage equipment online by Hartridge. Havent found a price yet on the setup yet. Maybe ill pitch it to the owner if theres enough interest...

...via IH8MUD app
 
I was reading the 1hdt and ft manual and you are able to verify needle lift with an SST and dial guage as well as check both pressures separately after doing the needle lift check and shim selection using a simple pop tester. Probably not as quick or accurate to .5 psi. But it is doable.
Now whether or not this SST is available or not i dont know....

...via IH8MUD app
 
To bad on the injector end of things,not much of a market either. I'll pm you on the plunger thing over the weekend,if only to save me some embarrassment on my hair brain idea.
 
Northwest diesel in abbotsford? I was at Thompson valley injection in kamloops for some training today and he said they have the right machine there.

...via IH8MUD app
 
There you go.

...via IH8MUD app
 
wrongway around said:
Good on you, good to know. Hope to hear some feed back on some of your work,not many out there doing the two stage injectors. I'll definitely let the new option be known. On a side note I tried getting my cam ground deeper so to stroke my plunger ,something you guys want to try. Couldn't believe I couldn't get it done locally.
Click to expand...

Hey, I just noticed what you were talking about. You want to dish the valleys in the cam plate deeper right? I'm sure we have some spares kicking around for cummins 12V. Use one of them and keep the stock one unmolested. Then you can compare the lift and duration and stroke distance and go from there. You have a 1hdt or what?

Only issue with a Cummins cam plate is the pressure might be around 650psi too high(250 bar injectors on a 12V), so you would probably still need to modify it.
I think the spec for the 12v is 1.25mm for timing, so I would think it would have a deeper dish in the cam plate to get the pressures up higher. I'll see if I can get some measurements off one for you.
 
Last edited:
BCR4619 said:
90Ltd or 91ltf... I forget his handle but he has brought his pump there and said they screwed something up and didn't work the same... Don't quote me thou.

When I talked to them about my truck 4 years ago they won't take your truck but rather you have to pull your pump and bring it to them or else they won't touch it...
Click to expand...

This was me..... Stay away, far away. My truck was the one in which they decided to not do the in shop vehicle work on these hdj81's anymore.
I was back 3 separate times and in the end I saw about 125km to the tank on the highway loss with no extra power. The extra smoke at idle came at no extra cost to.
 
Did they just do your pump or injectors as well? I've never been there myself, I've only heard they are decent. Steve from EBI recommended them to me for my 3B injectors awhile back. BD diesel is supposedly pretty good down at the coast. I think they mainly do performance dodges/fords/chev and big stuff. I think we deal with them pretty regularly.

...via IH8MUD app
 
They did both. And as an even bigger kick in the balls I only did it as a preventative measure. I too am in the heavy equip world and have been using them for years for out cat and John Deere stuff. Had a real good working relationship with them spanning 10 years. Needless to say I don't use them any more as after Their 3 attempts to get it rite I was left on my own to get it straight. Gord and dean tried to fix it to the best of there power but in the end it took me another year to get the truck dialled back in thru multiple trips to Ateb.
 
This sounds crazy and I don't know if it's the injection shops ego or what.
The 1hd-t manual has a full breakdown, and proper assembly including proper setup in the manual.
If they screw that up I have little faith.
 
Probably a little of both. They like to keep things secretive(not just shops, but manufacturers as we Bosch, Denso, Delphi etc.), and there aren't many guys that REALLY know what theyre doing anymore. Especially with the import stuff. Im very lucky that our shop is kind of liasoned with kamloops (thoimpson Valley Inj.) and the guy over there is really good.

I've only been at it for a few weeks in a shop, and it's amazing how much stuff just "clicks" after setting up a few pumps.

With every pump there is a sheet of test values for setting a pump up. You should always do that first before adding any performance changes.
Maybe they just assumed it was "close enough" and tried tuning from there. I dunno.
I know i'm pretty precise with stuff, and I hate sloppy work, so i try to get the testing as close to spec as I can before I call it good, and before adding any changes at customer's request(more fuel down low, response, more high end, torque control,etc.) you can make a real mess of things if youre rushing it as well..

Anyways

I measured up a cam plate from a industrial non turbo 5.9L 12V cummins today.
this is with the cam side facing up laying on a table.
Off the table the valley is 2.48mm at the lowest point.
Off the valley the peak is 1.09mm at the highest point.
so thats 1.09mm of stroke on the plunger, but the valley distance from the base may differ from plate to plate.
anyone who has a pump apart maybe can reference the 1Hd-t one, or even a 1Hz plate...
Ill check more as I go..
Edit: So that dial indicator was imperial(.001-.250") so I screwed that up. .548" and .259" respectively.

cheers
:beer:
 
Last edited:
yotahed said:
Probably a little of both. They like to keep things secretive(not just shops, but manufacturers as we Bosch, Denso, Delphi etc.), and there aren't many guys that REALLY know what theyre doing anymore. Especially with the import stuff. Im very lucky that our shop is kind of liasoned with kamloops (thoimpson Valley Inj.) and the guy over there is really good.

I've only been at it for a few weeks in a shop, and it's amazing how much stuff just "clicks" after setting up a few pumps.

With every pump there is a sheet of test values for setting a pump up. You should always do that first before adding any performance changes.
Maybe they just assumed it was "close enough" and tried tuning from there. I dunno.
I know i'm pretty precise with stuff, and I hate sloppy work, so i try to get the testing as close to spec as I can before I call it good, and before adding any changes at customer's request(more fuel down low, response, more high end, torque control,etc.) you can make a real mess of things if youre rushing it as well..

Anyways

I measured up a cam plate from a industrial non turbo 5.9L 12V cummins today.
this is with the cam side facing up laying on a table.
Off the table the valley is 2.48mm at the lowest point.
Off the valley the peak is 1.09mm at the highest point.
so thats 1.09mm of stroke on the plunger, but the valley distance from the base may differ from plate to plate.
anyone who has a pump apart maybe can reference the 1Hd-t one, or even a 1Hz plate...
Ill check more as I go..

cheers
:beer:
Click to expand...

So this is interesting. thanks for that.
I am sure you'll be building performance 1hd-t and 1hz pumps in no time:clap:
 
Yes that's some of the direction I'm heading . I'll check the specs this weekend . So your shop can cnc regrind profiles ultra cool. I blew me away that no one in Vancouver does,that even included the who's who of the underground.
 
I'm not exactly sure if we can do it or not, I still havent asked...

I was reading the Bosch VE training literature today and it did say each plate is tailored engine specific in terms of lift and duration of the stroke, and no two are the same. But if you knew what spec you wanted (maybe loosely in between a cummins and yours, more lift and try and keep the duration the same because the timing would be affected) youd definitley be on the right track, and a machine shop that was competent in cnc work could (should) be able to translate your specs into a precise custom grind.
You really wont have any idea until you compare two known plates together and figure out where you want to be spec-wise...

Like I say, I just started in the trade, so this is pretty new to me too.

Im playing with the idea of a 4BT pump tailored to a turbo 3B. Browsing in the cores room gives me all sorts of crazy ideas lol

cheers
 
I wouldn't be ashamed to say your new to the game. Sounds like you have a brilliant future. I'd be more nervous about being knew here. Surprised big boy hasn't added to this thread being he is resealling pumps now too, albeit the other side of the world. Forboreal you got a HP IP pump . What are the specs on that to be hp sounds good.
 
Bought one of BigBoys pumps. If you facecrack XXi industries he has some info posted on his pages feed about it. Pretty excited to get it all in.
Yet to fit it though (house renos eat my time)
Hoping to catch up on stuff in april.
 
You must log in or register to reply here.

Similar threads

xna0329
1993 1HDT Fuel Injection Pump Removal
Replies
7
Views
666
franklin40
franklin40
Eurasiaoverland
14B-T, 15B-T, 1HD-T Injection nozzles etc. - cleaning or replacement?
Replies
7
Views
1K
Eurasiaoverland
Eurasiaoverland
Y
1HD-T Pump
Replies
6
Views
2K
Eurasiaoverland
Eurasiaoverland
mcg
HDJ81V 1HD-T Vs. 1HD-FT
Replies
15
Views
2K
SNLC
SNLC

Users who are viewing this thread

Total: 1 (members: 0, guests: 1)

Share this page

Back
Top Bottom