I know Subaru makes flat 4 twin turbo engines. The Lagacy B4 RSK is a 2.0l 16v twin turbo beastie. I couldn't find out if it is sequential or not, so the exhaust pulse question is still in the air.
Steve
twin turbo
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Derrick from NC
- Posts: 647
- Joined: Fri Sep 22, 2000 12:01 am
twin turbo
Jason,
What is your useable booth range. Most single turbo cars have a booth range of approx. 2500-3500rpm. A turbo that starts to build boost at 3000rpm will not be capable of maintaining that same boost past 5500-6000rpm. The purpose of a sequenial turbo setup is for the 1st(smaller) turbo to spool up quickly and begin building boost immediately off idle. As it maxs out the 2nd(larger turbo) maintains that boost which if properly engineered could give you a useable bost range of over 6000rpm. This would be very difficult for a single turbo to do with the exception of perhaps the new varible vane ballbearing turbos
What is your useable booth range. Most single turbo cars have a booth range of approx. 2500-3500rpm. A turbo that starts to build boost at 3000rpm will not be capable of maintaining that same boost past 5500-6000rpm. The purpose of a sequenial turbo setup is for the 1st(smaller) turbo to spool up quickly and begin building boost immediately off idle. As it maxs out the 2nd(larger turbo) maintains that boost which if properly engineered could give you a useable bost range of over 6000rpm. This would be very difficult for a single turbo to do with the exception of perhaps the new varible vane ballbearing turbos