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I think it's been done once (I think I saw pics). Usually it doesn't make sense to to a twin turbo setup on a four cylinder. It's a lot easier to just use one big turbo rather than two small ones. You'd either have to have sequencial turbos or one turbo off of two manifold runners.
Originally posted by AccordAdict92 Well the new 2002 Civic SI drag car was converted to RWD and has a NSX engine that is twin turboed
V-6's make more sense to twin-turbo since you have two banks of 3 that you can put a turbo in with and have a much simpler exhaust route and charge plumbing scheme.
__________________ -Harry AIM: NDcissive
CRX and Pre '92 Civic, Engine Tech and Tuning, & Track and Autocross Forum Mod
On a V6 twin parallel turbos are ideal. The car that comes to mind in this case is the Nissan 300ZX twin turbo. Nobody sells a single turbo kit for it--all the big tuners sell upgraded twin turbos, one for each bank of cylinders. The piping is simpler with two turbos on a V motor than one turbo plumbed into both banks.