[wallybanger]

I understand the concept of turbo charging an engine. I want to turbo charge my 3B.

I know that you need a manifold, turbo, and oil piping for the charger.

What do you do for the fuel side? Is there anything special that needs to be done to the injection system? Do you need to get more fuel in there or do you just leave it alone? Do you just richen it up so it is ALWAYS pumping in more fuel? How do you do that?

[Tobugrynbak]

It all depends on how much boost your looking for. More boost needs more fuel.

So yes adjustments to you injector pump will be necessary to some degree.
Fun costs money how hard do you want to laugh?

You won't need more fuel at idle but as you increase rpm and as the turbo kicks in you'll need to have the Injector pump enrich the mixture. There are "Tuners" who modify Injector pumps on a regular basis, best to ask around your local area for the best place to go.

Cheers
Pez

[wallybanger]

Well it's a 3B with Pre-cups so I'm thinkin' around 5-8lbs should be safe (but I'm not entirely sure). How is the modification to the pump made? Is it internal or is there a linkage that is monkeyed with. Could a guy do it himself or is it advisable to take it to a professional?

[Tobugrynbak]

Tinkering with injector pumps and injectors is best left to those who have the right tools and training. Even my dad with 40 years experience in all things diesel won't tinker with it himself.

That said there are some external adjustments that you can attempt to fiddle with, as long as its done with moderation.
You can adjust the Injector Pump to broadly enrich the fuel. As your only going for lo blo turbocharging, you shouldn't need to do anything radical. Having an exhaust pyrometer will help in your tuning.

The Factory service manual for the engine will have detailed instruction on overhauling the Injector Pump. That will give you pointers on whats what as far as adjustments go.

[cruiser_guy]

When you turbo the 3B the fuel adjustments are dependent on the individual application.

My BJ60 needed no adjustments at all to maintain 10psi boost and 1250 F pre-turbo on the EGT's. The FJ55 on the other hand was overfuelling significantly and had to be turned down alot to avoid going to 1250 F on the EGT's pre-turbo.

Where are you located? No doubt there is someone nearby you on this list.

[jake2far]

Originally Posted by wallybanger

I understand the concept of turbo charging an engine. I want to turbo charge my 3B.

I know that you need a manifold, turbo, and oil piping for the charger.

What do you do for the fuel side? Is there anything special that needs to be done to the injection system? Do you need to get more fuel in there or do you just leave it alone? Do you just richen it up so it is ALWAYS pumping in more fuel? How do you do that?

One important mod you need to do, at least a 2 1/2 inch exhaust. With a turbo you increased inlet air you need to allow the exhaust to flow out the added air. I did a turbo on a 3B the exhaust was not done originally, Sheldon told me to install a larger exhaust, I did and the difference in performance, fuel economy and exhaust temp measured pre turbo was greater with the larger exhaust compared to smaller exhaust. Made the mods preform as I expected without the exhaust mod the turbo did not preform as I wanted.
I made a piston that replaced the fuel stop that moved to the boost level so my fuel increased as boost increased if you turn up the fuel after turbo install you will over fuel the motor until full boost.

Jim

[wallybanger]

Thanks for the replies guys.

So would a guy install an EGT between the manifold and turbo? I'm in Kelowna, so not too far from you actually.

The exhaust is no problem at all. I have a shorty comin out under the door sill and I'll probably run it without a muffler after the turbo.

it would be super awesome if a guy could run the thing without having to make any mods to the fuel system but I definitely don't want to damage the engine.

[cody c]

Originally Posted by wallybanger

Thanks for the replies guys.

So would a guy install an EGT between the manifold and turbo? I'm in Kelowna, so not too far from you actually.

The exhaust is no problem at all. I have a shorty comin out under the door sill and I'll probably run it without a muffler after the turbo.

it would be super awesome if a guy could run the thing without having to make any mods to the fuel system but I definitely don't want to damage the engine.

definately put a pyro on it pre turbo.

you dont need to adjust the fuel when you turbo it. i havent, a little less fuel in a turbo-d diesel just means lower temps. opposite of gas motors. later if you want to get more power out of it, you can adjust a screw on the IP which will add more fuel and up EGT's. you can bring add fuel/power till the temps are close to too hot.

Realistically you dont have to worry about the fuel part of it when you are doing a turbo, only for tuning which can be done any time later down the road.

[crushers]

14 is safe...
i know a guy that was running 20.
8 is underkill

Originally Posted by wallybanger

Well it's a 3B with Pre-cups so I'm thinkin' around 5-8lbs should be safe (but I'm not entirely sure). How is the modification to the pump made? Is it internal or is there a linkage that is monkeyed with. Could a guy do it himself or is it advisable to take it to a professional?

[crushers]

your pyro will dictate the fuel settings...

[wallybanger]

Cool. This is exciting stuff. I need more money in the bank!

[Tim-HJ61]

See the thread at this forum and also the thread in this forum on :12H-T 3" exhaust installation in HJ61: for ideas on how to increase fuel and flow, no matter what engine.

Tim