I see all of these twin turbo with their crazy piping going all over the place. What i am wondering is why cant you have a header that has 2 turbo flanges on it? It makes much more sence to me but I have never seen any of you do it that way.

This one is on a nissan 3000.

I think it would be much easier to do it that way. You could just twis the flange up so it wasn't point down and run duel intakes. seems easy to me. How come no one does it that way? is it because no one makes one?

Coop

 

Most twins are compounded (one turbo feeds the other). This allows you to use a small turbo for quick spool up, then a large turbo for massive airflow at greater RPMs. This allows for a higher boost without superheating the incoming air.

 

so are you saying this set up would only be good for turbos of the same size?

Coop

 

Gassers often use parallel twins to get quick spoolup and good airflow at low boost levels. Because diesels don't have detonation problems to worry about, we can run 60 - 80 psi of boost (assuming we can keep the head on ). The best way to get that much boost is to turbocharge a turbocharger. That is why we run compound twins. The big turbo sucks in air from the outside, compresses it to 30 psi or so, then feeds it to the little turbo. The little turbo takes that 30 psi air and compresses it another 30 psi or so - and the engine sees 60 psi of reasonably cool air.

 

so by running parallel twins you will not be making as much boost? I have seen this on the old 2.4 volvo diesels. He said he was running 30psi but could make more then 40, idk if this is ture. Thanks for the reply.
Coop

 

Yeah, single stage turbocharging doesn't work real well over 40 psi.

 

thanks wanna

COop