Some of you may have heard of Triples.....

[juddski88]

here:

http://www.idahodieselpower.com/showthread.php?t=1290

and here:

http://www.competitiondiesel.com/forums/showthread.php?t=62378

so whatchya think? if we can fit them why not? a little cutting of the fender, some creative intake plumbing, creative plumbing in general...i assume a built motor with a big enough cam could run 2xS475's and a S480 or S483.....based upon the calculations thrown out there in the compd thread.

 

[Ben46a]

If we can make enough air for 1000 RWHP with streetable twins, why add to the confusion.

 

[juddski88]

they hint on them being easier to tune, as well as more streetable, maybe even safer for a motor that isn't a max dollar build.

 

[TrentNell]

It sounds interesting , I would like to see the results just for curiousity , while i agree that we have more options for air then the motor can probably handle we need to find a way to have huuuuge air , like 1200 hp @ 1200 deg egt's huge maybe this could do it ?

 

[juddski88]

http://www.competitiondiesel.com/forums/showthread.php?t=66463

here is one set of results...not a duramax, and not 1200hp...but i think the potential is there, and i think that by next spring we will see a couple MOD dmax's with the triples and we will have our answer...i only wish it could come sooner:drool:

 

[TrentNell]

Secound thought ................. can we even fit 3 turbo's ? and cant tell from the pics how the plumbing lays out , is it 1 small charger feeding 2 secoundaries ? and if so are the 2 secoundarie's haveing to feed back through the small charger ?

 

[juddski88]

it's 2 "smaller" chargers (atmospheric) feeding a larger one (manifold)...i would try to put the two smaller ones off to the pass. side fenderwell and leave the large one in the valley and cant it a bit if needed...plumbing would be tight, very tight, but i think its feasible if mika can fit 3 separate stages under his hood:cool2:

 

[TrentNell]

it's 2 "smaller" chargers (atmospheric) feeding a larger one (manifold)...i would try to put the two smaller ones off to the pass. side fenderwell and leave the large one in the valley and cant it a bit if needed...plumbing would be tight, very tight, but i think its feasible if mika can fit 3 separate stages under his hood:cool2:

Gotcha, I wonder............................ with spooling would you still have to light the first turbo ( valley ) I cant think of a way around it , and then the 2 others ? sorry just getting a good feel of how it needs to work in my head and how they say it spools really fast , it seems as though you would still be limmited on the size of turbo in the valley if you had to light it first ?

 

[juddski88]

the way i understand it is the 2 atmos. chargers are acting as one big one but come into their map much quicker? and some guys that are trying this are using 3 identical cold sides with the manifold charger's hot side being a little looser. they have also said this works well but to me it seems like it's underachieving. i am not sure about the spooling of the top turbo first ? what spools first in a set of twins? i have never studied it first-hand.

 

[TrentNell]

the way i understand it is the 2 atmos. chargers are acting as one big one but come into their map much quicker? and some guys that are trying this are using 3 identical cold sides with the manifold charger's hot side being a little looser. they have also said this works well but to me it seems like it's underachieving. i am not sure about the spooling of the top turbo first ? what spools first in a set of twins? i have never studied it first-hand.

In tradition compounds the first 20 psi or so is mostly the top turbo ( PSI anyway , i am shure its producing flow ) , so the top turbo spools first but mostlty due to size , it takes more heat to spool the large secoundary so i dont know how it would work with 3 chargers of the same size , secoundy I guess it depends on the size and how the mapping changes setup that way , say you take 3 chargers that flow 70-80 lbs per minute i wonder if you would net 210-240 lbws per minute ?

 

[juddski88]

i believe that is the theory..with lower overall pressure....

 

[Turbo Performance]

I'm pretty sure everyone's goal with triples is to get the lbs/min up as quicker and more efficiently than traditional twins. Easier to achieve and tune with tighter housing and 3 turbos doing the work instead of 2 turbos.
I don't think you have to spool the larger top turbo first as the two smaller turbos will come on boost and let the engine start to gain RPM and breathe before the manifold charger comes to life. I've talked to a few guys going to triples, still working them out, but seem happy with results so far. Pretty sure this is the direction quite a few mod pullers will go for next year. Just my thoughts.

 

[Turbo Buick 6]

2 paralell chargers compounded to 1 charger has been around for a long time

 

[juddski88]

i figured it has paul but not in a street application right?

 

[super diesel]

Street & Sea applications.

 

[McRat]

When you consider: Room, fab costs, turbo prices, oiling supply, etc, triples seems to be a solution for a problem that doesn't exist.

 

[juddski88]

When you consider:
Room- YES THERE IS LESS ROOM, BUT IT SHOULD BE ABLE TO FIT IF OTHERS HAVE DONE IT OR ARE DOING IT CURRENTLY

fab costs- YES MORE FAB IS NEEDED BUT PLUMBING IS CHEAP

turbo prices- ACTUALLY THERE ARE MORE THAN ONE ACCOUNT OF THREE PROPERLY MATCHED TURBOS BEING MUCH CHEAPER THAN 2 (S400'S USED HERE)

oiling supply- WOULD IT BE A HUGE DETRIMENT TO OIL PRESSURE? IF IT IS, THERE IS ANOTHER PUMP ON THE MARKET FROM DPR.

etc, triples seems to be a solution for a problem that doesn't exist.

how can we know that this isnt an advantage over twins if no-one tries it?
and from what i've read, many of the mod pullers are going this route next year over big twins and singles

 

[Idaho CTD]

The mod guys are going to them because there aren't single turbo's big enough or cheap enough to provide the air they need. In the case of Scheids they used 2 HX82's for a primary. If there was a single turbo equivalent it would most likely cost way more or be way too big to make fit. Generally your better sticking with one single turbo for a primary.

 

[juddski88]

i may be lost on the lingo here...primary= smaller turbo i thought..secondary=bigger atmospheric turbo....i am usually wrong.

in any case, may i ask why a single is better than two for the atmospheric side of things?..cost/fit aside

 

[Idaho CTD]

Rotating mass plays a role. Depending on the turbo's two rotating assemblies can weigh quite a bit more than one larger one. Housing sizes available also has to be factored in(typically smaller turbo's are better for multiple housing sizes but that isn't always the case).