3B compound turbo, 25psi boost!?!

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Both turbos probably could use a rebuild and I plan on changing the larger turbos compressor wheel to a TO4E 46 trim. Considering I made this thing for towing, Id like a slightly smaller little turbo as it doesn't spool as hard as id like in the low rpm range. A rebuild might help with that a bit I guess. Ill most likely swap in a TD04L-6cm or even a TDO4-5cm, but that sounds too small. I'm a bit undecided. Its a lot of work to change the little turbo.
g
 
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I would reccomend to change to TD04-5cm with a 16T comp wheel. Port the internal wastegate....alot

46 trim would be good size, make sure you use a large comp cover

Intercool between stages

I am very sure that you would be astonished at the difference
 
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Thanks for the advice Gebby. I run a 44mm external wastegate so I planned on doing some plugging and welding to smooth out the old stock internal wastegate port in the exhaust housing. I will polish the turbine housing as much as possible as well.

I like the 13T map a little better for PR as at the moment I am only running minimal ratios. Something in the order of 1.4. I only map the motor to 3000rpm which is why I believe you like the 16T. It can go alot higher. For me however, the 13T and even the old crappy 13C I am running is sufficient. Changing compressor wheels and housings is fairly easy.

I will run higher ratios when I get the new head, inter-cooler and redo the pump. Until then I can really only use most of the little turbo in the lower range more like a sequential set up. I get a few lbs up higher, but I lack the fuel.

The 46 trim has its own compressor housing. The only concern I have is that I will be driving it with the old stage 1 turbine. I am not sure if my drive pressures will be all out of whack with such a larger wheel. I have a stage 3 but it is massive compared to it. Both I have in .63. I was toying with the idea of getting a stage 2 for more torque and mating it with a .49 housing. What would you think of that?

Anyhow, im going to try out the 46 with the old stage 1 with a rebuild and see how it does. I figure ill pick up a few pounds and run cooler. Right now im getting about 14lbs at 2500 rpm but my wheel is off its map.
Thanks
g
 
I approve of this thread. Very much so lol. I'm turboing my 3b with 466000km on it over the next month hopefully. Have a turbo off a 5cyl Volvo And an intercooler off one as well. Should be good!
 
Sorry to make excuses, but no work lately on this set up. My boiler craped out and I am in the middle of major landscaping, redoing my siding and adding a patio and addition onto the back of the house. About all I have planned for the summer is an intercooler.
After rebuilding this engine it never got as good a milage as before. I consistently got 10L/100km or less but now average 10.5-11.5L/100km I am lifted and gained about 600lbs on the 62 body with a roof rack. I figure its not bad over all.
 
How tight were your new rings? I found over 1 litre/100km difference between tight aftermarket rings and factory Isuzu rings with much lower tension.
 
I checked all the gaps of the new rings and all except 2 fell within spec. I filed them just a tad.
I need to get my timing redone as running more boost like this affects timing quite a bit from what I have read. This motor shouldn't need as much advance at part throttle, that is until I turn up the fuel, then ill need more advance. I was looking to adjust my timing for max power at partial throttle cus that is what I mostly drive, but am not sure how much power that will cost me at wot. I think ill get it dyno tuned before RV season, but that is all wot. Ideas?
 
if theres was some way to advance the pump with load or rpm like a distributor in petrol/gas engine , though alot of injection pumps already had that ( is it adjustable )thru the fuel rack in the governor? also injection pumps have the opposite to that dont they for preboost lag that limits fueling until turbo makes boost , forgot what its called .

need a hand with ur house , if was there would help ya
 
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Gerg: Might I be the second person to put an external wastegate in a 60 series egninebay, and maybe the first to compound turbocharge an 2H engine?





Did this on a Sunday and as you can see I clearly run out of material, just barely had enough laying around to improvise an intake and connections between turbo and intake manifold :rolleyes:

It is an IHI RHB4 turbo fram a 1.7TD Isuzu engine, quite small I know, but thats the point isen't it :D
Plan is to not run to high boost, maybe around 2.5 - 3.5 bar and get it quite soon in the RPM range.

Going to just run it as a single turbo for now and experiment a little before I try to spin my head around how to find a perfect match to it.

I know it looks bad and that, that charge pipe won't hold up under boost, thats why I only see a max of 0.3bar right now. new charge pipe, silicone adapters and intake pipe ordered and soon to be mounted :wrench:

What do you guys think of it ?
 
Good on ya for fabing something up. I havent made anyhting for ages. Id have to totally agree with Dougal about the little turbo sizing. IHI stuff is also extremely hard to find maps for too which sucks. If you want Ill dig up some numbers as I was mapping a compound for a 1hdt and the turbos size pretty close to the 2h. I was secretly going to do a 1hdt swap in the near future, but now am stuck for the next year or so with a 1fzfe so Ill have to turbo that and screw with gas stuff which is way more irritating than diesel. Irritating is a kind word actually. I hate gas engines. Like one might hate Nazis or pedophiles or circus clowns. Not rhodeo clowns mind you. Any clown that can die doing their clown stuff has to be respected.
 
gerg said:
Good on ya for fabing something up. I havent made anyhting for ages. Id have to totally agree with Dougal about the little turbo sizing. IHI stuff is also extremely hard to find maps for too which sucks. If you want Ill dig up some numbers as I was mapping a compound for a 1hdt and the turbos size pretty close to the 2h. I was secretly going to do a 1hdt swap in the near future, but now am stuck for the next year or so with a 1fzfe so Ill have to turbo that and screw with gas stuff which is way more irritating than diesel. Irritating is a kind word actually. I hate gas engines. Like one might hate Nazis or pedophiles or circus clowns. Not rhodeo clowns mind you. Any clown that can die doing their clown stuff has to be respected.
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So you've landed an 80 then? Turbo FZFE sounds like a fun money pit.:steer:
I concur with the clowns.
 
Yeah I did take the plunge. Its a good truck except for the engine. Cource now its missing when its cold and doesnt want to run properly today, but runs fine tomorrow. I think I have a bad connection for an injector or something. I have already replaced the ignition system and tracked down a dozen vacume leaks and it still persists while not throwing codes. i dont particularly feel like replacing all of the electrical system one piece at a time. I think ill turbo it and blow the head off of it and then my wife will be more open to the engine swap idea. Filling up every 5 days is also very fun too. Ahh the joys of 20l/100k

So the for the 2h I would go for a cheap easy to find stock turbo set up you can find off of talons and eclipses from 95 to 99 I believe:

td04hl-15g-6 (<200$). will spool fast with a good map to redline and is very hard to surge. Also cheap and plentyful to find.
The good thing about the td04h is that you could always upgrade it to a 19t if you rebuilt it. Its what wheelingnoob is doing. Better map.

For large id do a he351cw (300$) off of mid 2000s cummins or a older hx 35 if you really want to cheap out (100$). Better would be a borgwarrner s200 you can often find used on cummins forums as they are small and get changed our for s300s often (<500$)


Serously though you should get steel incert pistons before attempting anything past 10lbs as the motor will give up the ghost very quickly compounding it. Like it could be within a few months if you ran high boost with high egts.


g
 
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So Lasse you dont see many external wastegate used peroid. I dont know why other than the extra plumbing. They do flow better overall as the gasses dont need to compress and enter the scroll to be diverted so you net less backpressure than a stock internal every time. they are also less prone to leaks.

I wouldnt boost more than what you are now as that little compressor is serously working hard to stay on the map with that engine. You for sure shouldnt rev it up too high at all. Like not past 2500 . Im guessing as there was no map I could find, but given what it is used on, you are in tiger country.

I didnt see you were in Norway, sorry. So... it would be easier to find 94-97 volvo 850 td04hl 15gs as they will be some of those in your area I suspect.
 
gerg said:
I was mapping a compound for a 1hdt and the turbos size pretty close to the 2h.
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this is really a surprise to me .. owing both engines I can tell to me they are quite different in CFM requirements ..
 
So im in the process of replacing the crank as it kinda is in two pieces at the moment. I moly coated the crank and let it cool too quickly I suspect and tempered it. Fortunately I ran it for about 30 seconds only and the cranked stayed keyed together tight and there was no other damage. When I get it back together ill post up a video for you guys.
 
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