Injection pump compatibility (1 Viewer)

[Itacud916]

Hi all, I am building a 1HD-T to put in my HZJ77. I'm looking for some of the parts gurus on here than can give me some advice. I may have gotten a bit ahead of myself and already purchased an injection pump for the 1hdt before doing enough research, you know being a little impatient. The part number of the pump is 22100-17580 which it turns out is for an engine mated to a manual transmission. The transmission I have is an automatic A440F. I am wondering what the difference is between a manual vs an auto IP. I've done a fair amount of reading but haven't found anything to clear on the matter. Will I be ok using the manual one or will there be issues? Thanks in advance.

 

[Squash]

That IP looks like it was installed in the General Market countries from 1990 to 2001. Differing emissions spec's around the globe.

22100-17290	(01/1990 - 07/1992)	1	$7,205.14
22100-17620	(08/1992 - 12/1994

pump is on my 1992 HDJ81 with 442 auto.
Other pumps
22100-17550
22100-17560
Note: Pump body is common on many models, the internals vary with application such as 4 cylinder, 6 cylinder, 1hz, 1hdt, yanmar marine engines, Corolla etc. Quite interesting possibilities.
You can add bigger fuel supply lines to injectors or stay stock.
As for your transmission I believe it's fully hydraulic so really just a kick down cable attachment with is probably on the pump or easily obtainable.
Sorry for the ramble but I'm currently skiing in Japan and fondling every Cruiser I find.

 

[Itacud916]

That IP looks like it was installed in the General Market countries from 1990 to 2001. Differing emissions spec's around the globe.
22100-17580 This pump is on my 1992 HDJ81 with 442 auto.
Other pumps
22100-17550
22100-17560
Note: Pump body is common on many models, the internals vary with application such as 4 cylinder, 6 cylinder, 1hz, 1hdt, yanmar marine engines, Corolla etc. Quite interesting possibilities.
You can add bigger fuel supply lines to injectors or stay stock.

That’s good to know! It seems the only difference I can see externally in regards to hook ups is the linkage for the throttle and transmission. It looks like I can just pull the plate off my 1hz pump and swap it onto the new pump, but i just don’t know if there are any internal differences. Seems like it shouldn’t matter what trans you have as long as the pump is compatible with the engine.

 

[Squash]

Internally there are differences between the 1hz and 1hdt.
Cracking pressure is one difference because of different injectors, the 1hdt is two stage.

 

[Squash]

Internally there are differences between the 1hz and 1hdt.
Cracking pressure is one difference because of different injectors, the 1hdt is two stage.

I did screw up on my pump...edited.

 

[Itacud916]

Internally there are differences between the 1hz and 1hdt.
Cracking pressure is one difference because of different injectors, the 1hdt is two stage.
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thanks for the input but the question is if there’s a serious difference between manual and auto IPs for the 1hdt or if it’s just a matter of having the right link plate to accommodate the transmission.

 

[Squash]

Not 100% certain but I doubt it can be an issue.

 

[Madcrix12]

Internally there are differences between the 1hz and 1hdt.
Cracking pressure is one difference because of different injectors, the 1hdt is two stage.

1hdt is 2 stage or 1hdt fe?

how does a 2 stage work in a non electric setup

 

[Squash]

The 1hz engine uses a single stage injector.
The 1hdt and later series utilizes a 2 stage injector.
Cracking pressure not electricity is the key.
The electronic side of things is more an emissions duty.

 

[cgmud]

So with my 1994 (newer IP part number), if I obtain the early-gen IP and the paired injectors that came with it, and swap them both in, will things be golden?

 

[rick_d]

You should be able rebuild and match the injectors with the pump at a pump service place. The later pumps have a bit better design with the internals than the first generation. I run (ran) later pumps in early blocks- just use the correct injector washer for pistons (early w early, late with late).

 

[cgmud]

However, thanks for some input from @mudandrock the more significant difference is that you'd have to switch out your throttle lever on the pump in order to keep your TPS sensor. Otherwise you’ll never have overdrive.