Fuji Heavy Industries, the owners of Subaru has developed a new and improved boxer engine for the Japanese auto brand. This will be the third generation model of the four-cylinder gasoline engine and it has been renewed for the first time since 1989. Accommodating this new engine, the company has built the new Gunma Oizumi Plant just for this purpose. Available in either in 2500 cc or 2000 cc forms, the engine still maintains lightweight, compact, low centre of gravity and good vibration balance. In addition to that fuel efficiency has improved by 10 percent.
Changes on the inside of this completely new engine include a more compact combustion chamber as well as a longer stroke, previously difficult due to chassis mounting conditions. There upgrades are said to improve combustion efficiency and help generate a sufficient mid-low speed torque with improved fuel efficiency. Fuel efficiency has been further optimized with improved intake port configuration and the addition of partitions inside the port, the use of TGV (Tumble Generated Valve) and EGR (Exhaust Gas Recirculation).
The engine also uses AVCS (Active Valve Control System) on both the intake and exhaust valves. The intake particularly will benefit from an intermediate lock system that allows valve timing to be advanced or delayed for precise control over intake and exhaust valve timing. Apart from that, the engine employs lighter moving parts such as pistons, connecting rods and a compact oil pump, which provides approximately 30 percent reduction in friction loss.
The cooling for the engine uses a separate circuitry for the block and the head, which again improves fuel efficiency and output levels. The company also pointed out that the new 2.0 litre boxer can produce 146hp and 196Nm of torque. The new engine is expected to debut with the 2011 Forester, due next year.
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No Turbo ah?
I think this new 3rd gen is developed with Toyota for the new FT-86 engine replacement. If not mistaken direct fuel injection for petrol engine is also included in the new series. Turbo for Subaru is easy, but due to emission control, Subaru have only either went for N/A or went for lower cc to be turbocharged. Besides that, if not mistaken WRC from 2012 will all went for N/A also?
Anyway if you even have a chance to drive these fabolous engines, i will bet that you will like it’s 4wd handling and also the characteristic of the boxer engine..
4B11T still FTW~
While Subaru’s Flat-4 engine has already achieved quite a legendary status, whatever happened to their Flat 6 engine? Hopefully Subaru will not overlook the continued improvement of this unique powerplant, as Subaru, besides Porsche are the only car manufacturers in the world that produced Flat-6 engines. It would be interesting to have the successor tu Subaru’s flat-6 powered SVX sports-coupe.
What is the difference between in line 6 engine and Flat 6 engine?
Boxer (flat) engines are known for their low profile symmetrical design. This helps the car keep its centre of gravity lower, improving the balance of a car.
a perfect examples came from porsche engine…and their handling..
So this boxer engine will replace the EJ engine? If so then there will be high performance NA engine for FT-86 and turbocharged engine for Impreza WRX STi.
oh yes this is what i call an engine. thumbs up subaru.
fyi, boxer short replaced everyday
Where is the diesel box?
Diesel boxer have already used in European Subaru Legacy & Forester.
2.0 but only produce 146hp???
neo r3 lotus 1.6 but produce 145hp..
And what emissions rating does your campro get?
Subaru’s new PZEV engines are burning cleaner than some used on hybrids and anything its japanese peers can muster.
Real world requirements are pretty different from a boy racer fantasy world.
We have not reach that kind of tech yet, when ar?
r3 lotus got 145 only…
mivec/vtec got 170+hp…. n in standard form
r3 lotus already tune got 145 only?
Oh..good..cant wait for this engine to be slotted to the Forester..
‘The cooling for the engine uses a separate circuitry for the block and the head, which again improves fuel efficiency and output levels. The company also pointed out that the new 2.0 liter boxer can produce 146hp and 196Nm of torque. ‘
Is this a joke? Two separate cooling circuits are necessary to bring a 2.0 liter petrol engine to 146hp (73hp/liter)? A basic 1.6 campro has already 110hp (68.75hp/liter)…
Btw: A modern european 2.0liter Diesel engine i.e. from Ford, Peugeot, Mercedes or Volkswagen has around 170hp (85hp/liter). Without two seperate cooling circuits but with better effiency…
There’s more to an engine than just horsepower. How much torque does the fangled campro engine make, at what rpm, and is it peaky or flat?
How much torque? Good question. At what rpm this Subaru engine has it’s peak torque? And is it peaky or flat? :D
BTW: Diesels from Ford, Peugeot, Mercedes or Volkswagen have around 350Nm at 1750rpm… ;)
campro got torque dip….
How do you know that Subaru doesn’t have a torque dip?
I can’t see any torque/rpm diagram for this enigine… :D
it wont, cause it got vvt pulley..
campro dont have one…
hope to see this one in a toyota soon
4G63T DSM says:
24/9/2010 at 7:54 pm
And what emissions rating does your campro get?
Subaru’s new PZEV engines are burning cleaner than some used on hybrids and anything its japanese peers can muster.
Real world requirements are pretty different from a boy racer fantasy world.
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Yea agreed, cant compare like this… Now all automakers have to comply with emissions standard, unlike Bolehland ppl lucky still can modify this modify tht… Cant wait for the new Subaru engines…
good one