spereira
Chemical
- Mar 10, 2003
- 40
Hi guys,
I have a question regarding turbo setups:
Suppose I'd need 3bar for a 1.5lt diesel engine at 5300rpm. This gives me around 28lb/m.
I've checked compressor maps of the GT series and none is able to give 3bar discharge pressure for such a low mass flowrate...either regarding turbocharger efficiency either by being able to deal with surge at low rpm.
the way i see it, i can use two smaller turbos in series, kind of a double stage compressor (each one operated by a different set of cylinders) the problem being the need for an extra IC and thus, extra plumbing and increased pressure drop (which, maybe, could be compensated for if the two separate turbos would have a higher efficiency than a single one) even so, turbo lag would increase :/ I was told it has been done before on rally cars either with two sequencial turbochargers or one supercharger (for low revs) and 1 turbocharger but from what I understood, it wasn't so easy to operate this system!
Any ideas/comments?
Regards,
SP
I have a question regarding turbo setups:
Suppose I'd need 3bar for a 1.5lt diesel engine at 5300rpm. This gives me around 28lb/m.
I've checked compressor maps of the GT series and none is able to give 3bar discharge pressure for such a low mass flowrate...either regarding turbocharger efficiency either by being able to deal with surge at low rpm.
the way i see it, i can use two smaller turbos in series, kind of a double stage compressor (each one operated by a different set of cylinders) the problem being the need for an extra IC and thus, extra plumbing and increased pressure drop (which, maybe, could be compensated for if the two separate turbos would have a higher efficiency than a single one) even so, turbo lag would increase :/ I was told it has been done before on rally cars either with two sequencial turbochargers or one supercharger (for low revs) and 1 turbocharger but from what I understood, it wasn't so easy to operate this system!
Any ideas/comments?
Regards,
SP
