Twins, as in dual turbo's

[JasonCzerak]

Anyone ever consider, or try a twin turbo setup that _IS NOT_ setup in series?



2 HX35's; one plugged into cylinders 1-2-3 and one plugged into cylinders 4-5-6. Both combing into a single inner cooler, or dual coolers, with sperate intakes manafold plugs... .



If this is bad, or not very effective, why?

 

[SRadke]

Two HX 35's even with their tightest housings your engine would be seing 24 cm^2 in the turbines. We're talking serious laaaag.

 

[JasonCzerak]

Two HX 35's even with their tightest housings your engine would be seing 24 cm^2 in the turbines. We're talking serious laaaag.

ok, never mind hx35's then. . how about any smaller turbo in this configuration?

 

[Forrest]

Yea, someone did 2 Hy-9s & I thought there were pics posted ... somewhere. If I remember right, it was a lag pig.

 

[jdooner]

TWINS... It seems to me that you'd need 2 turbos designed for a 180 cubic inch engine to avoid turbo lag. Smaller turbos= less reciprocating weight=faster spool. Stock sized turbos for half the cubes would lag and you wouldn't get much boost. I'm assuming that 3 cylinders are driving one turbo. Correct me if I'm wrong.

 

[RMalone]

Given all the extra plumbing and lag issues, why bother? Compounded twins are proven, reliable, available and KICK A**. Come to think of it I gotta get me some!!!

 

[JMingledorff]

Well the main reason for twins is to keep high hp (high fueling) cool at full power w/o the lag of a big single. Twins like what you are talking about will either lag like hell or not make much boost and do nothing for egt's. The small turbo gets the truck off the line and spins the big turbo up which feeds the high boost.

 

[jdooner]

Jason. . as I've seen many time in the past, your question wasn't addressed. Except by me, of course

 

[BigGunZ]

Probably the best reason NOT to attempt this is the fact that no 2 HX35's will perform identically. Nor will their wastegates and electronics. Cylinder pressure would inevitably be different on 3 of 6 cylinders. Sounds bad to me.

 

[Mhannink]

not to steal the threads but i have one that i heard a guy asking about and wondered why its not used much basically the idea he thought that twins did was one was spooled by exhaust and the intake side fed the what would be the exhaust side of the second which would spool and push air in the turbo now the biggest problem i see here is that your wasting all that air the first turbo is pushing but im wondering what other things there could be



as for the 2 small ones it would seem like it would not move enough air to really help the motor out and they would have to be very very small in order to spool quick

 

[RMalone]

As to the original question, I don't know for sure but I would bet the tried and true companies in the twin-turbo industry i. e piers, poole, adkins, etc, etc, have considered or tried two turbos running three cylinders each. The fact that no one offers a kit speaks volumes as to the feasability. Of course, just because no has made it work doesn't necessarily mean it can't work.

 

[mattymac]

As to the original question, I don't know for sure but I would bet the tried and true companies in the twin-turbo industry i. e piers, poole, adkins, etc, etc, have considered or tried two turbos running three cylinders each. The fact that no one offers a kit speaks volumes as to the feasability. Of course, just because no has made it work doesn't necessarily mean it can't work.

There are pics of such a set up like that here somewhere, I think it was in the Comp or Prod. Acc. forums. The posts stated that it was a pretty heavy fueled 24v with two HY9's running on 3 cyl. each. They said that it spooled pretty well but could not control EGT's on the upper end. The compounding effect is much more effiecent also tried and true. If that way was so much better or even pretty good then you would see more people and the aftermarket building more of them.

 

[SRadke]

I think the pics Matty is thinking of was actually a set of triples where the two small turbos were parallel and feeding one large charger in a compound setup. I believe it was ATS who put it together but my memory has let me down before.



-Scott

 

[mattymac]

I think the pics Matty is thinking of was actually a set of triples where the two small turbos were parallel and feeding one large charger in a compound setup. I believe it was ATS who put it together but my memory has let me down before.



-Scott

Oh no! I remember the pic in my head to this day, it was a custom header with only two HY9's and they were talking about how it spooled good but EGT's got pretty toasty up top. Besides, I have a ton of those pics of the tripple turbo set up truck! Totally diffrent animal. The twin truck looked pretty hacked together.

 

[robertyoke]

I think the pics Matty is thinking of was actually a set of triples where the two small turbos were parallel and feeding one large charger in a compound setup. I believe it was ATS who put it together but my memory has let me down before.



-Scott

it is ats they have the set up sitting on the floor of there showroom. I dont think it worked any better than the twin set up's ( and alot more plumbing)so they canned it.

-robert