Twin Intercoolers?

[Kris]

My S3 has twin intercoolers, as does the RS4/RS6/TT and most of the VAG Turbo engines. It just is claimed to work better than having 1 large intercooler for such reasons:

Large intercooler can cause pressure drops with small turbos
Smaller intercoolers are designed for smaller turbos such as the VAG Barg Warner KKK turbos (K03/K04)
Discreet placement, having 2 allows the benefits of a larger intercooler with cooler intake temps without the huge front mount in the grill.

The RS4/RS6 have a bank of cylinders per intercooler which is different to how the 1.8T works. They use 1 IC per bank of 3 cyliders

It could be a space issue for the smaller cars such as the S3/TT... And add to the fact a front mount would look extremely ugly in a S3/TT.

[Captiva Fan]

Twin intercoolers are, in every example I've seen, about space; vrmmmpshhh's comment about there being two intercoolers on the 300ZX is true, but the intake piping joins up again before (or at) the intake manifold so the separation doesn't really mean a lot. The blown Eunos 800M has two intercoolers too; now there's an "interesting" intake tract, it's definitely about space there.

[Damlowet]

Originally posted by Forg
Twin intercoolers are, in every example I've seen, about space; vrmmmpshhh's comment about there being two intercoolers on the 300ZX is true, but the intake piping joins up again before (or at) the intake manifold so the separation doesn't really mean a lot. The blown Eunos 800M has two intercoolers too; now there's an "interesting" intake tract, it's definitely about space there.

Thats not quite true Forg,

The TT Zeds I have seen have totaly separate induction paths for each bank. With the turbo from opposite bank feeding the other plenum. The only time the two induction paths meet is the balance bar which joins at the rear of each plenum.


Damo

[Rhys]

Forg,
The miller cycle 800M, was a quad cam (big heads) 2.3lt V6 that was also front wheel drive so there was a gearbox in that bay too. Very tight (toight like a tiger) indeed.

[Captiva Fan]

Originally posted by Damlowet
The only time the two induction paths meet is the balance bar which joins at the rear of each plenum.

Which would qualify under "at", in my reckoning.

[Damlowet]

The pipe would be lucky to be 10mm i.d


hmmmmmm..............okaaaaaaaaaaaaaaaay!





Damo