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Nixlimited · 10-07-2012, 01:52 PM

Twin scroll means a divided turbine inlet, but only one turbine. Twin scroll takes advantage of cylinder firing order and helps spool a turbo faster. Given the same turbo specs, a twin scroll will typically spool faster than a single inlet. I am not sure, but my guess is that the single inlet would be a bit more efficient up top.

BTW, I believe BMW moved from TT to a single turbo using a twin scroll exhaust housing.

10-07-2012, 01:52 PM	#2 (permalink)
Nixlimited A True Z Fanatic Join Date: Aug 2009 Location: San Diego Posts: 1,235 Drives: 15 GT-R / 11 Prius Rep Power: 25	Twin scroll means a divided turbine inlet, but only one turbine. Twin scroll takes advantage of cylinder firing order and helps spool a turbo faster. Given the same turbo specs, a twin scroll will typically spool faster than a single inlet. I am not sure, but my guess is that the single inlet would be a bit more efficient up top. BTW, I believe BMW moved from TT to a single turbo using a twin scroll exhaust housing. __________________ Car Sold! Pleasure being a part of the Z community. New ride: 2015 GT-R - 647 WHP / 641 WTQ (e85) & 543 WHP / 519 WTQ (91)