How do Twin Turbos work?

cdx2k1 · Postby **cdx2k1** » April 9th, 2005, 8:27 pm

Hi all.Ive looked hi and low on the net and can't find this out.Does any1 know how they work?

mrlantra · Postby **mrlantra** » April 9th, 2005, 11:13 pm

It depends on the motor and installation. in either case there are 2 basic types of twin turbos, sequential and parrallel. in sequential one spins up at low run to give torque, then via a bleed off valve another spins up at higher rpm ( some times it's not a bleed off valve tho ). in this first type there ar also differences where the first turbo may turn off or not. in the sequential ( sq for short ) the turbos are normally different types, sq setups ar best for larger vehicles with auto or cvt gearing as it is a very complicated and expensive setup that is best left to cars that really need to get off the line better ( eg subaru legacy b4 rsk and gt 94-03 ) The other type is simply 2 turbos per bank of cylinders ( v6 ) so one powers one side and another the other, both are always identical turbos in this case ( audi 2.7TT in the S4 etc ) . the parallel twin turbo is also rather complicated with a turbo and intercooler for each bank etc. It is very rare to have 2 turbos in a serial like setup, never seen a good working one at least.

belalegosi · Postby **belalegosi** » April 9th, 2005, 11:43 pm

isnt the VG30DETT set up parallel?

X2 · Postby X2 » April 11th, 2005, 10:10 am

There is also another type of parallel setup where 2 turbos spool and provide the boost to the same inlet (throttlebody). Basically 2 small turbos spool VERY quickly and provide a moderate boost level.

EG: 2 small turbos spooling to 7psi, but combined output is similar to a larger turbo, but spool time is decreased considerably.

Razkal · Postby **Razkal** » April 11th, 2005, 10:17 am

the 3rd gen turbos are sequential

mrlantra · Postby **mrlantra** » April 19th, 2005, 8:57 pm

X2 wrote:There is also another type of parallel setup where 2 turbos spool and provide the boost to the same inlet (throttlebody). Basically 2 small turbos spool VERY quickly and provide a moderate boost level.

EG: 2 small turbos spooling to 7psi, but combined output is similar to a larger turbo, but spool time is decreased considerably.

Well as always there's always something you learn in here you didn't know before.

gizmo · Postby **gizmo** » April 27th, 2005, 5:58 pm

so what type of twin turbo setup does the gtr r33 hav??

Mitsu power · Postby **Mitsu power** » May 2nd, 2005, 12:15 am

^^^ THE SUPRA 2JZ ARE SQ TURBOS THE 3000GT AND PARRALLEL AND THE VR4 GALANT ARE TO INTO ONE

Bezman · Postby **Bezman** » May 2nd, 2005, 11:31 am

so what type of twin turbo setup does the gtr r33 hav??

2 into one

Rx · Postby Rx » August 28th, 2005, 6:44 pm

i learnt a lot here

Maserati · Postby **Maserati** » August 30th, 2005, 9:00 am

good reading fellars
always curious about these twin turbo set ups

God Bless the Black Top* · Postby God Bless the Black Top* » August 30th, 2005, 8:53 pm

twin turbos are also setup to cut down lag by making up for the dominant turbo ent?

Computerman · Postby **Computerman** » September 19th, 2005, 7:44 pm

Is there any turbo that does not require an intercooler? What is the least amout of boost a turbo can deliver?

Postby **Yeo** » September 22nd, 2005, 1:19 pm

Is there any turbo that does not require an intercooler?

You do not have to have an intercooler with a turbo.....

Advantages to Intercooling
Suppressing Engine Knock. Compressed air leaving a turbocharger is often more than 200Â° F. This warm air is much more prone to predetonation and autodetonation (knocking) than air at ambient temperature and pressure. Knocking, if unresolved, can ultimately ruin an engine. There are several approaches to eliminating ping, including using higher octane fuel and cooling the compressed intake air. An intercooler can achieve the latter, reducing the likelihood of ping.

Increasing Intake Air Density.
Another advantage to cooling the compressed air is that the cooler air will also be more dense, which is the objective of turbocharging.

plex · Postby **plex** » September 24th, 2005, 2:15 pm

good infor there....

demented · Postby **demented** » October 10th, 2005, 2:39 pm

Good info here...Are there quad-turbos??

cdx2k1 · Postby **cdx2k1** » October 10th, 2005, 5:03 pm

Yeah.The Ford GT90 had 4 turbos and the new VW supercar has it.

demented · Postby **demented** » October 11th, 2005, 2:53 pm

What about the Quad-Cosmos???

cdx2k1 · Postby **cdx2k1** » October 11th, 2005, 7:00 pm

^^You serious or you kixing?

achillies · Postby **achillies** » October 12th, 2005, 6:45 am

which setup does the twin turbo skylines use

demented · Postby **demented** » October 13th, 2005, 8:20 am

cdx2k1 wrote:^^You serious or you kixing?

I serious hoss. check the V-12 quad turbo R-34
http://skylinev12.neufblog.com/skylinev12/

cdx2k1 · Postby **cdx2k1** » October 13th, 2005, 10:25 am

So what is a quad cosmos? :oops:

demented · Postby **demented** » October 13th, 2005, 12:45 pm

A Mazda Cosmo with Quad turbo .... :mrgreen:

I know the Cosmos have Quad rotors so I wanna know why the ycan't have Quad turbo too??? One for each rotor...

cdx2k1 · Postby **cdx2k1** » October 13th, 2005, 6:19 pm

Space and arrangement of the engine perhaps?

Postby **Chiney** » October 15th, 2005, 12:35 am

space i would guess as well

Postby **~VēġÃ³~** » April 20th, 2006, 10:20 am

good info! :!:

halfbreed · Postby **halfbreed** » April 20th, 2006, 7:48 pm

^^^dred, why u only in my head!!!?? ting i tellin myself i hadda spen hours lookin for, i comin an meetin them at the top of the page.

good info tho.