This car is a JDM Subaru Legacy GT-B ,he's a friend and asked me to help him install a boost controller (MBC)on his car , i installed mine and it was easy but his he said is a Biturbo not a twin turbo what are the diffrents?how can i help him install the boost controller on a biturbo car?and would it be any diffents installing it on a biturbo,single turbo , and a twin turbo car?also can some1 explain the diffents from an AWD car and a 4WD car if it does have any diffrents thnx

 

Bi-turbo is a term used for sequential turbos, where one turbo is smaller than the other. The small turbo spools early, reducing lag, while the big turbo provides the high end power.

4WD typically puts equal power to both axles, whereas AWD can adjust the power to each axle and/or wheel.

 

I'm very sure that car have a turbo on each bank of the engine. It's not sequential. Hooking the MBC up just like you do on the Evo, except you put a "T" on the line that go to the wastegates (one on each turbo). Good luck.

 

Thanks Forrest , but this hook up would be if its a twin turbo right?how would the hook up deffer from the Biturbo hook up?

 

bump!

 

Its just semantics, really, there's no difference. In this country, in our marketplace, 4WD typically refers to a truck or body on frame SUV that has a transfer case that allows the vehicle to be shifted from 2WD to 4WD. Vehicles like that typically also have a low range where the center diff is locked and you get the effect otter is talking about, this mode is for off road purposes only because the car will drag its wheels around on pavement making it hard to control and put excess stress on it because it forces the wheels to turn at the same speed.

Crossovers and cars that are AWD are AWD all the time. They typically do not have a low range and can not be shifted into 2WD mode. They can slip and divert torque automatically and can usually send most of their power typically to the front wheels as most of these vehicles are based on FWD car platforms, thus they are "on-demand" 4WD. There are of course exceptions. Mitsubishi starting calling the last few 4WD Montero Sports they made "A4WD" because they were AWD all the time, but still had manual transfer cases and a low range. New Escalades are called AWD because they do not have user selectable transfer cases like the lesser Tahoe 4WD and Silverado Z-71 trucks on which they are based, but they are body on frame SUVs.

If you want help with the Subaru, I would check out a Subaru board.

 

Thank you , but whats a SuBaru Board?

 

Nasioc

 

whats a Nasioc

 

Its a forum just like this but for subys"subarus"

 

Nasioc

 

Are you sure it's not a twin-scroll turbo? Most JDM Subaru use the VF37 twin-scroll turbo and some use the VF38.

I never hear of a bi-turbo or twin turbo factory Subaru.