ip code

Discuss (and cuss) the Nissan LD-series OHC Six diesel engine, popularly available in the US in 1981-83 Datsun/Nissan Maxima Sedans & Wagons.

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ruthless79
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Joined: 13 years ago

ip code

#1

Post by ruthless79 »

i am needing the code on the side of the ld28 injection pump that is PExxxxxxxxx i am needing this info to see if i can use the pump in a custom project thank you for time in advance
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asavage
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#2

Post by asavage »

An NOS (brand-new) 1982 LD28 IP:

(click on image for larger)
Image

A used 1982 LD28 IP:
Image

More pics of the new IP are in this post.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
ruthless79
Posts: 3
Joined: 13 years ago

#3

Post by ruthless79 »

thank you for the link i also would like to know if someone has built one of these for serious power
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asavage
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#4

Post by asavage »

The stock LD28 IP already supplies more fuel than can be used with the stock breathing.

To get more power, a turbo is needed. See this post and most of the rest of the thread for info on how to add a turbo inexpensively to an LD28.

Once you've added a turbo and added more air to the combustion chamber, to get more power you need to then add more fuel. To do that, a boost aneroid compensation device ("LDA") needs to be added to the top of the IP. See this post for a cutaway on that device. If you try to turn up the IP delivery rate instead of using a boost controller LDA, you'll have lots of smoke and increased EGTs -- not good.

See this post for info on having the LD28 IP modified (by a professional) to accommodate the LDA from a different VE-style IP that has a turbo (ie the Volvo/Volkswagen turbodiesel Six). Swapping out the top over and retaining the LD28's throttle shaft etc. might be able to be done by an adroit home mechanic.

I do not know if the LDA and IP top cover from a VE-style Four cylinder IP will fit to the LD28's IP housing.

HTH
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
ruthless79
Posts: 3
Joined: 13 years ago

#5

Post by ruthless79 »

thank you again i had read 2 of the post before what i am more after is if the ld28 can handle 20+ of boost i would like to build a small car diesel with some serious power if the ld28 can not handle that kind of boost i may just build a mercedes om603 or om617 diesel as for the ip i was wanting to know what size the plungers where it looks like 10mm for it i was hoping it was an inline pump hence the asking for the pexxxxxxx code thanks
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asavage
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#6

Post by asavage »

The Inline IPs won't rev -- well, they'll rev but are inaccurate at high speeds. The LD28 is a high-speed diesel and runs smoothly at above 4,000 RPM. The OM617 does not.

I don't know whether the IP used on the LD28 has a 9mm, 10mm, or 11mm plunger, I've never been into one that far. I'm reasonably certain that the plunger and distributor head from any other 6-cylinder VE-style IP would be a bolt-on.

Whether you can reliably push 20 lbs boost is a whole 'nuther issue. The LD28 is not a B-series Cummins. You'll need better pistons to do that much boost. I may be wrong, but I don't think the LD has under-piston oil squirters, and lacking those the heat can't be shed fast enough.

Stick with 7 lbs or less (light-pressure turbo), keep the fueling reasonable, and I think it will hold up. But if you need a reliable 160 HP 2.8l Six, when it was designed for 80 HP, look for a different engine. It's a good mill, but not that good.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
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