Turbo on a bj42 3b

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Bj84

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Oct 9, 2012
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Hi guys,

I'm from the Netherlands, and have a landcruiser bj42 with a 3b engine.
Now i was looking around to mount a turbo on my bj42.

I have read some threads on the forum about different turbo's for the 3b, but i did't find what the 'best' turbo is for the 3b.

I'm looking for a turbo that gives boost at 1500 rpm til 3000?


Could anyone advise me with the turbo choise?

Thank!

Johan
 
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I have a Garrett TBO363 from the T3 family- .42.48 A/R
Builds boost fast and some (not me) pust these beyond 20lbs.

There are a ton of threads on how to choose a 3B turbo.... happy searching.
 
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Bj84 said:
I've read your topic, nice landrover...;)
At how many rpm's does your turbo kick in?
Click to expand...

Thanks:cheers:

I have no idea actually... no rev counter you see.. It does build boost quite quick. And as I've turned the pump up to the max it dumps a lot of fuel into the engine at low revs when stomping the throttle. It smokes a lot but as it gets more fuel it also has more power than stock at low revs when the turbo isn't doing much yet.
 
I have a TD05-12B on my 3B and it gives just a shade under 1bar at full boost, on the floor up a hill etc. When driving around town it's pushing 6-8lbs almost all the time.
It seems like a good fit. It came off of a 4cyl Volvo.
My other turbo 3B has a Garret turbo from a Volvo. The Mitsu turbo provides more snort I think.
FWIW.
 
gerg said:
Hey magnus, what kind of bosot do you see at certain rpms at WOT?
Click to expand...

I have ask him that a few times, no answer yet. Thats the turbo I got sitting in my shop waiting for me to have some time to install. He also recently turned the fuel up from what I have gathered but more info Magnus would be awesome!
 
Sorry fellas.......didn't realize that Q was posed a while back.

I get full boost 14psi at about 2k rpm.
I can cruise on the highway with 33" tires, 4.11 gears at 70mph and it boosts 8-12psi.
the thing seems to work pretty good. My full is turned almost wide open on my 3B IP. Recently my EGT failed but it always stayed cool. I'm running SVO most highway driving which I'm convinced produces cooler EGT for some reason.
Anybody know the specs on the TD05-12B? My other 3B (in a 62 series) has a Garret T3 I'm told with a ".48/.42 trim housing". I'm not even sure what that means, hot side? compressor? The point is that the 62 seems less powerful but then again the 62 is considerably heavier than a 40 is it not?
If you compared these two turbos which is most appropriate for a 3B?
Interestingly enough I believe they both come off a 740Volvo. Maybe different years? Or is this incorrect altogether?

I should add that both wastegates are disconnected and both turbos run 'wide open' depending upon exhaust flow......ie no boost is bled off through an open wastegate. Wastegate is permanently shut.
The 62 series (Garret turbo) has no boost gauge so I'm not sure what it actually puts out.
 
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The MIH turbo, TD05-12B, is an ever so slightly more modern turbo than the old T3. Its turbine wheel is slightly smaller 49/56 vs 52/59. It has a much smaller compressor which I cant find a map for, but it should be maxed out at 15 psi for sure. The exhaust housing come in 3 sizes... 6,7 and 8 cm. With a smaller exhaust housing then a regular t3 and less rotating mass it probably spools much faster. Essentially it is the same technology in a smaller package. At least that's what I could find. It falls in between a t3 and a t25 although it is much larger then a a t25. I would say easily that it is more suited to the 3B than a t3 for what you are using it for. I would not push it past 15 psi and 2500 rpm as I have a gut feeling you are off the map after that.
 
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magnus_heydoc said:
Sorry fellas.......didn't realize that Q was posed a while back.
Click to expand...


Sorry, I think I came across sounding rude. But that is great info, at WOT when does the boast start to fall off? or dip down? Also are you adjusted with the altitude comp. or the edic arm?
Edit: It seems with that turbo you should be getting full boost (or 12+) at lower rpms if the fuel is turned all the way up.
Also I agree with the SVO comment, I feel I run cooler when on plant oils.


gerg said:
I would say easily that it is more suited to the 3B than a t3 for what you are using it for. I would not push it past 15 psi and 2500 rpm as I have a gut feeling you are off the map after that.
Click to expand...


I never found a map for it either, but I found one turbo slightly bigger and one slightly smaller and I think your right about going off the map, I guessed at the time around 3k would be pushing it. But thats just based off speculation.
I guess we could compare what cfms the volvo could put out and somehow come up with something from there.
 
I don't find the TD05 falls off at all. When I hold it on the mat it just stays at about 14lbs as the truck continues to move towards 80mph in the flats. I sort of 'run out of road' at 80mph or a bit more. I don't think I've ever been faster than 85mph with my current set-up.
It may fall off at 3k rpm but that seems fine to me as you're out of the 3B powerband by then anyway.........ie. 3B makes more noise at that rpm but there's no increase of power. I choose to not keep my truck at 3k rpm or higher for very long as I believe there's no benefit in my experience driving it and likely some risk being at that rpm or higher for longer periods. It may not be true but it's just my real world experience.

It appears I 'lucked out' by choosing this TD05. It was simply the first turbo that came available when I was considering the turbo build; 100 bucks from a shop I frequent. I have a spare as well. They appear to be readily available for cheap. Don't get me wrong I love the Garret as well but it may be b/c it's in a 62 which is much nicer to drive on the highway than my old 40 series even though it's suspension is modified with Old man 'heavy' springs, brand new Old Man shocks and a front shackle reversal. 62 3B turbo is a waaaaay nicer driver.

I've turned up fuel by turning the HAC. The lock nut has only a thread or two to tighten on. Ie. it's very close to wide open.........I have no EDIC but a shut off rod instead. I even bent the arm slightly so it could move even further and deliver even more fuel. The TD05 gives 14lbs to match. Trouble is recently my EGT has failed so I don't put it on the mat for long up big hills. The only reason I'm ok with this is b/c when my EGT was working it never exceeded 500C except for when my air cleaner was clogged with dirt. Meaning I have a pretty good idea it's cool from previous experience. Still though I try not to push it until I get a new gauge.

I don't think it's possible for that turbo to push past 15lbs. I've wired the wastegate shut and I can't get it to put out more than 15lbs tops. Either that or I don't know how.
 
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If you ever wanted to upgrade your td05 you could get a 16g compressor wheel/ housing combo like this on ebay
http://www.ebay.ca/itm/Turbo-Compre...r_Truck_Parts_Accessories&hash=item2323146d1c
The wheel would hold boost to redline and beyond and most likely boost sooner than the 12B. Its a bolt on for the housing, but the wheel would definitely need a balancing after putting it on the turbo before you could run it. Would be a pretty easy mod. Doing a non aggressive port, gasket match job and match the turbine housing transitions from your manifold would help as it sounds like its choking if its not making more boost even at 3K.
 
Gerg,
I'm not sure who could balance the turbo around where I live seeing as I'm not near a big center here on the ease coast of Canada. There is one guy I could contact to ask about that.
More importantly, would it be safe to go beyond 15lbs. of boost? I know some do boost more on the 3B but some say it's deadly.
I'm interested as it would be pretty easy to take that turbo off and it doesn't appear to be that much money to do this.
aaron
 
That is a huge question. Now keep in mind that as I work in the health care field I am forbiden from giving direct and concise answers. Turboing an old motor is dodgy buisness. Bearings and headgaskets and stuff are all in various unknown stages of death. Now, assuming you know this, I would say check your oil pressures accurately and if they are well above spec I would change the head gasket to MLS and go for it. With an intercooler you can max the stock pump out by low 20s boost, or around 25lbs with egts in the 1200F range. Your turbo will accellerate the wear on your motor. running the pressures you do now, your motor could actually last longer than stock. All this being said, if your pressures are at the low end of spec, I would address that first.
 
my motor was completely rebuilt b/t 150-200kms ago max. ie. 2003.
new sleeves, bearings etc.
My OP is above stock always.
Does that change your answer?
What does MLS stand for?



I'm in health care as well so I'm learning as I go. Before I converted my rig to SVO I hadn't pulled a wrench in my life. Since then..........
 
MLS stands for multi layer steel. It is 3 or more layers of stainless steel sheets that comprise the gasket instead of the fiberous stuff before. The MLs is ubber tuff and can withstand combustion pressures over every inch of the entire gasket instead of the simple ring the old one had. On the old ones, once the ring was gone the rest of the gasket might as well have been made of baby bunny fir. I recomend the MLS as I have had several fiberous gaskets fail when I upped my boost. One of them had the metal reinforcement split in two hroizontally around each of every ring. One just happended to fail first, but all were essentially failing. Timing can also play a big part in this stuff so I intentionally retard my timing a bit.

It sounds like the rest of your motor is good to go. Do you know if you have an MLS gasket? It would be great if you did. It might be hard to tell if you do or dont as I cant remember if any of the gasket is exposed in a small area that would give you a definate answer.

Im a nurse and work in the OR. What are you into?
And yes I am married to a girl and have kids and shoot at stuff and do other normal guy things.
 
So Radd cruisers or 4 Wheelauto for a MLS gasket? Where can I get one. I'm going for the hybrid TD05/TD06. It sounds awesome and I need a new HG anyway as I've got 'trace' glycol in my oil according to oil tests. I highly doubt I have a metal HG.
I have a Saab intercooler sitting in my garage awaiting installation. Do you know how much boost can it support?

Don't feel bad or get defensive; I'm a pseudo-doctor (chiropractor) and like to surf but have never shot a gun in my life. I hang out with a yoga instructor. I highly recommend it although I'm pretty sure she can take me.
 
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