3B compound turbo, 25psi boost!?!

[gerg]

3B compound turbo "Maggie T"

So I made a compound turbo set up on my 3B the other day and figured I should post it. I works really good. I get 10 lbs boost at 1500rpm and 20 at 2200 rpm. The settings are pretty conservative right now but it is good for more. I didnt want to puch it more till I redo the head.

Here is it built on a dead B engine.



and this is it installed.



Now I know what your thinking... man he chromed everything! But if you look closer it is actually reflective tape as I was in a major camping time crunch and was having some heat soaking issues. I do have a few spare tin foil hats if anyone needs one for when they sleep.

g

 

[lostmarbles]

I am trying to work out the connection between this and "Maggie T on a cold day".


So your rig is called "the iron lady"?

And it was cold when you took the pics?

 

[Toyfj45]

I opend this up said "nah this is photo-shoped" closed it then opend it up again (like it would help).
If you dont mind putting some more details up i would like to know more.
Cheers Matt

 

[Dougal]

So how's the longer term driving reports? Did you manage to beat your mate with the landrover?

 

[Falco80]

Interesting work, i like your thinking. I've seen they usually do compounds on the large diesel pickup's over in the states, but this is the first i've seen on an old Toyota diesel. I'd be keen to see how your long term thoughts are too...

 

[gerg]

Ahh thanks for the complement but it is not "photo-shoped", it is exactly what it looks like .. erm for better or worse hehe.

Dougal it is working great and thanks for all the help. It really wouldnt have been possile without the great advice of a trained professional! Thanks man.

So far I have discovered that A 3B can pull 9500lbs up the Coqahala and not die. However my coolant system is now quite inadequate for towing so I will be upping to a 4 core or something like that. I swapped out the mechanical fan for a tarus and it helped lots.

I took it camping for 10 days after finishing it and I only managed to blow up the crossover charge pipe to the throtle plate. I kinda knew this would happen but thought it would hold for a day. It blew up in the first hour so I fabbed up a metal one which I should have done in the first place.
g

 

[DieselFumes]

whoa man! SWEET.... drool drool

 

[Volcano cruiser]

G,
This is really interesting. Can you walk us all through the plumbing and specs. For example which two turbos did you use, e.g. CT 26 and CT 12? How did you balance them? I can see that the compressor wheel of the lower, larger turbo feeds the smaller one, how do you have the hot sides of the turbos plumbed in relation to the exhaust manifold. I see some Y piping there but the rest isn't clear to me. What EGTs are you running at what boost levels? Are you planning to run an intercooler with the compound turbo? As I said really interesting, sorry for all of the questions.
John

 

[slowandsteady BJ]

Wow a twin turbo B. Its nice to know it will take 20lbs of boost, makes me feel better about the whimpy 10lbs I'm running.

So hows the oil pressure after adding 2 turbos?
How are the EGT's?
You going to intercool that monster?
What turbos are those?
Most importantly.....How sweet does it sound?

Cam

 

[gerg]

So the sound is pretty cool I must say. Plumbing goes:

manifold

TE04H / External wastegate

T3 50 trim with a .63 hot side


Both small turbo and wastegate feed into large turbo.
The little turbo is gated at 7lbs right now.
Large turbo is not wastegated.

Oil pressure is unaffected unless I pull some really long hills with my trailer. Smokin hot I still get 25 psi at 2000rpm. That is the lowest it has gotten. I run 15-40 dino right now.

It is hard to get the EGT to 1200F pre tubo. It usually runs around 1000f hard accelleration unless I hit a hill towing then It can spike to 1300 but I dont let it get that high.

On a side note I run evans waterless coolant and comming home from the interior I got the engine temp up to 265F. I actually thought my guage was broken but it wasnt and I crapped my pants. No problems though. The head is fine and there is almost no blowby from the tube. I think it really mucho broke my rings in from last years rebuild. I dont recomend doing that by the way. DOH!

g

 

[gerg]

Ahh and about the mate with the Land Rover... he sold it and bought a Dodge Cummins so... for now he still kicks my ass on the hills grr.
g

 

[Tapage]

nice nice .. are you running a termo switch with the tausrus fan . ? how much amps it takes . ?

 

[gerg]

Its a 2 speed fan and right now I just have it wired for high via a togel and selenoid. I will wire an adjustable thermostat for the low speed but I am in the middle of a kitchen reno right now. Everything I ever read about this fan is true. It sucks the juice but man does it push alot of air. It moves about as much air as my stock fan at 3000rpm with the shroud.
g

 

[Tapage]

I need to improove my cooling system and I was just debating this option .. .

 

[gerg]

I am not 100% sure if it is, but the guy I bought it off of said it was from a 98 taurus. I was happy to find that it has a shroud incorporated into it and only gapped like 3/4 of and inch on either side and from top to bottom I only had to trim like 1/2 an inch. The shroud has alot of extra meat for triming and this set up is sealing quite well. I have it mounted as a puller. Ill post a pic up later.

I am happy to say that most of the time I run with the fan off even on hot days. Temps are around 190F to 200F. I only have to put it on if I am in traffic or pulling a slow hill. Towing is another matter all together.
g

 

[Tapage]

I am happy to say that most of the time I run with the fan off even on hot days. Temps are around 190F to 200F. I only have to put it on if I am in traffic or pulling a slow hill. Towing is another matter all together.
g

that's just the low speed .. that's nice .. and you said the factory taurus shorud it's quite functional for us even better then ..

 

[gerg]

Actually right now the low speed is currently not connected to the adjustable thermostat. I run with no fan on at all most of the time and only switch the high on once every other day or so. The truck really does quite well without it as long as there is some airflow over the rad.
g

 

[vinny tetravino]

thats friggin great I need compound turbos too

 

[cruisedeisel]

holly poop! thats dam rights crazy, would that be better than running two smaller turbos running from two cylinders each?

and you don't need twin turbos to get 25psi of boost. thats what i get when i shift at 2500-2800rpm

 

[Dougal]

holly poop! thats dam rights crazy, would that be better than running two smaller turbos running from two cylinders each?

and you don't need twin turbos to get 25psi of boost. thats what i get when i shift at 2500-2800rpm

Yes the compound system is far better than running two parrallel turbos. Parrallel turbos are no use on a diesel unless it's a V block and you run one on each bank.

What engine/turbo/fuel combination delivers 25psi?