Thread: does anyone have any info on injector pumps for 4BD1

Hay Doug's, dose your pump have the boost controled anerode on the rear?
If so can you post a pic up of what it looks like?

Originally Posted by Larns

Hay Doug's, dose your pump have the boost controled anerode on the rear?
If so can you post a pic up of what it looks like?

Here ya go.
Cummins 4BT Forums - View Single Post - more power from a 4bt1t/2t

well i am looking for a way to increase the power of the 4bd1 without having to turbo it . otherwise i had 3 ideas one was when i am ready to start on the county i would send the motor away to get completely refurbished and then put a turbo on it , second was to send it away and get it completely refurbished and fit a different pump on it , and last of all just try and find a original 4bd1T (nitrided cranks etc etc) and stick in it . so if anyone has any ideas wat so ever i would love to hear them .

Originally Posted by c.h.i.e.f

well i am looking for a way to increase the power of the 4bd1 without having to turbo it .

There isn't one. Isuzu and other engines makers tune their engines to the max available while keeping longevity and staying within emission limits.

A different pump will not help. The existing pump is currently adjusted to the outcome I mentioned above but simply turning screws will make it deliver enough fuel to make lots of black smoke, soot up your oil and melt your pistons.

There are very good reasons for the popularity of turbos.

take it to a diesel shop...


have them up the delivery by 1cc/500 strokes then refit your pump and respill time it.

then get the air intake cleaned up and get a set of extractors made to suit the 1800-2200 RPM range.

it'll blow black smoke to buggery but you'll get more power without the turbo.

ther'es plenty of headroom in your existing pump to mess with the fueling and if you want it direly on the cheap I can do it "farmyard" style with the whole thing in situe.. but its not good for the stater motor and your not getting a guarentee.

ok thanks for the info !
better yet does anyone know were to get a genuine 4bd1T (i heard that they were in a small quantity of range rovers at one stage) i would like to hear what people hav to say about 4bd1 compared to 4bd1 fitted with a turbo compared with a genuine 4bd1T the reason is what i hav stated before is that i currently hav a 200tdi which i love and my old man has a 300tdi but between us we hav our old 86 county which is sitting in the yard fading away , so i hav been currently been thinking about what i can do to it when the time comes to overhaul it. i was thinking about going overboard on it and making it a "very" respectable vehicle. thats why i am considering all options to do with engine, gearbox etc etc ill probably even goto the trouble of stripping paint of and painting it in new colours . so if anyone has any input i would like to hear it !

thanks...

how much more do you want out of the engine...?

I assume youve driven a stock 3.9 suzi to compare it to the tdi's what do you want to change...

the non turbo will take a very mild turboing with no hassles even if its a bit old.

the turbo version, well, go nuts.

If you intend on working it hard then get the original turbo motor. There is just no substitute for Isuzu engineers.
Turboing a non-t engine is ok, it's what I have done, but you miss out on the benifits of the turbo tuned pump and the turbo ground camshaft, along with the t-model injectors they all add up to getting the most out of this engine. The turbo will suck the usable torque from the low end, I have changed my pump and injectors over and that made a huge differance, and I'm currently waiting for my custom grind cam to be ground. From driving the original turbod engines a fair bit I can't wait to feel the differance that the new cam will make.

Doug's, that pump looks HUUUUGE, what dose that add to the weight?10-15kg I have to admit that that is the first time I have seen one, is it worth it? Mine is the same as the lower pump in the pic.