Hi, Guest
11-02-2005, 10:32 AM
[quote=NOS2Go4Me,Nov 1 2005, 09:11 PM]
I was led to believe by years of automotive production that sequential twin-turbos worked best on higher-displacement, hgiher exhaust-volume engines. Hence, this is why this set-up worked best on the Toyota Supra and its inline-6, no?
I would assume a twin, non-sequential setup would work best for extreme V6s/V8s, but a single turbo is more prevalent - ie. the Grand Nat.
6 cylinders' worth of exhaust gas turning 2 turbos would work better than 4 cylinders' worth of exhaust gas.
*They used twin turbo in the supra and 300zx to reduce lag and to produce a flatter torque curve,but now with today technology turbo lag is reduced big time with ball bearing turbo and direct injection(FSI),you will start to see on a newer turbocharged cars that they use FSI ,engine compression ratio is on the high side like 9+:1.The reason why they use this system is to eliminate turbo lag and to meet the new emission regulations.In addition to that fuel economy is improved because the engine is tuned to run a bit leaner. The new audi A3 2.0t and mazdaspeed6 use this system B)
I was led to believe by years of automotive production that sequential twin-turbos worked best on higher-displacement, hgiher exhaust-volume engines. Hence, this is why this set-up worked best on the Toyota Supra and its inline-6, no?
I would assume a twin, non-sequential setup would work best for extreme V6s/V8s, but a single turbo is more prevalent - ie. the Grand Nat.
6 cylinders' worth of exhaust gas turning 2 turbos would work better than 4 cylinders' worth of exhaust gas.
*They used twin turbo in the supra and 300zx to reduce lag and to produce a flatter torque curve,but now with today technology turbo lag is reduced big time with ball bearing turbo and direct injection(FSI),you will start to see on a newer turbocharged cars that they use FSI ,engine compression ratio is on the high side like 9+:1.The reason why they use this system is to eliminate turbo lag and to meet the new emission regulations.In addition to that fuel economy is improved because the engine is tuned to run a bit leaner. The new audi A3 2.0t and mazdaspeed6 use this system B)