Subaru debuts 3rd gen Boxer

[Matador]

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Boxer lovers, the next chapter in your love affair has just begun. Fuji Heavy Industries, parent company of Subaru, has introduced the latest, third-generation boxer engine that will relieve the second-gen after 21 years of service. This is a brand new lump, not a rework, and FHI has built a factory just to produce it.

The displacement, bore and stroke have all been increased, and it will be available with four cylinders in 2.0- and 2.5-liter displacements. The intake ports have been redesigned, lighter pistons and connecting rods offer reduced internal friction, and separate cooling circuitry for the block and the head are some of the changes that have resulted in a lower emissions and a ten percent increase in fuel efficiency. No power figures are being quoted yet, so we'll have to see how it measures up when it finds its way into production engine bays.

This new boxer will be Subaru's primary engine, and will first be seen in the Forester.

Will this be the engine that Toyota/Yamaha reworks to put into the FT-86?

[ichitaka05]

Originally Posted by MatadorRacing_F1

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Will this be the engine that Toyota/Yamaha reworks to put into the FT-86?

prob. one thing for sure is, subaru's engine design is gettin closer & closer to Porsche. which I'm not saying that's bad, just nightmare to work on.

[Dark]

Originally Posted by MatadorRacing_F1

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Will this be the engine that Toyota/Yamaha reworks to put into the FT-86?

I wonder if Toyota/Yamaha are going to tweak the engine because if they do, you might not want a Porsche anymore. Anyone ever heard of Yamaha's cross plane crankshaft? you guys wouldn't want to hear the sound.

If Yamaha helps developing head cylinder, it would be good enough for the engine.

Edit: Cross Plane Crankshaft is in Yamaha R1's I4 engine.

[4agze]

I like the "The bore and stroke have been increased, The intake ports have been redesigned, lighter pistons and connecting rods, separate cooling circuitry for the block and the head" I smiled when i was reading that hope its going to be lighter than the Current H4, no explaination on their version of the direct injection yet so ill wait and see.

[Dark]

Originally Posted by 4agze

I like the "The bore and stroke have been increased, The intake ports have been redesigned, lighter pistons and connecting rods, separate cooling circuitry for the block and the head" I smiled when i was reading that hope its going to be lighter than the Current H4, no explaination on their version of the direct injection yet so ill wait and see.

Right. and I really want DI in this engine. If they build a new gen engine, they should use DI tech to improve both performance and fuel consumption. light overall weight is the strong point of building a future engine.

[Matador]

I hope that though the internals and block are lighter, they are still strong.

@Dark, I'm not sure how feasible a flat plane crank would be in a boxer engine....

**runs off to do research**

[Midship Runabout]

Originally Posted by MatadorRacing_F1

I hope that though the internals and block are lighter, they are still strong.

This

[RRnold]

Originally Posted by Dark

I wonder if Toyota/Yamaha are going to tweak the engine because if they do, you might not want a Porsche anymore. Anyone ever heard of Yamaha's cross plane crankshaft? you guys wouldn't want to hear the sound.

If Yamaha helps developing head cylinder, it would be good enough for the engine.

Edit: Cross Plane Crankshaft is in Yamaha R1's I4 engine.

Why wouldn't you want to hear the sound? It'll sound a hell lot better than the "gurgling" sound on the current boxer motor. Those things sound like the engine is bogging out while submerged in water.

Coming from a I4 to a current L-Twin, the R1 sounds insane with that slight twin rumble. It definitely makes riders do a double take b/c they are expecting to hear a Tiller, RC51, Duc or SV and they see an R1 pull up.

I rode the 09 R1 @ Willow and you can feel the difference; a lot less engine breaking yet very smooth while on the throttle.

Here is a vid

Music to my ears!

[Dark]

Originally Posted by RRnold

Why wouldn't you want to hear the sound? It'll sound a hell lot better than the "gurgling" sound on the current boxer motor. Those things sound like the engine is bogging out while submerged in water.

Coming from a I4 to a current L-Twin, the R1 sounds insane with that slight twin rumble. It definitely makes riders do a double take b/c they are expecting to hear a Tiller, RC51, Duc or SV and they see an R1 pull up.

I rode the 09 R1 @ Willow and you can feel the difference; a lot less engine breaking yet very smooth while on the throttle.

Here is a vid

Music to my ears!

@ RRnold: R1 would be the best literbike under 1000cc out there, except the weight and that huge body that I can barely ride on one.(I'm 5ft7") sigh...
Yamaha really knows how to make an engine sounds right because the company produces world's best musical instrumental. You don't want to hear the engine's sound because you will definitely fall in love. I'm kinda a bit off topic here.

Back to the topic. I read the article about 3rd gen boxer on MT, the new engine is not equipped DI, so it's possible to gain more power and fuel consumption when it is.
Link: http://wot.motortrend.com/6687430/te...ine/index.html

[RRnold]

Originally Posted by Dark

@ RRnold: R1 would be the best literbike under 1000cc out there, except the weight and that huge body that I can barely ride on one.(I'm 5ft7") sigh...
Yamaha really knows how to make an engine sounds right because the company produces world's best musical instrumental. You don't want to hear the engine's sound because you will definitely fall in love. I'm kinda a bit off topic here.

Back to the topic. I read the article about 3rd gen boxer on MT, the new engine is not equipped DI, so it's possible to gain more power and fuel consumption when it is.
Link: http://wot.motortrend.com/6687430/te...ine/index.html

Didn't know you had an R1! It was the top until the S1000RR came out.


Back to the 3rd gen motor, this doesn't sound too appealing.

Despite all the changes and the claimed improvements to fuel economy and mid-range torque, actual output of the 2.0-liter engine is nearly identical to its predecessor. That means 146 horsepower and 145 pound-feet of torque, an improvement of four pound-feet.

Should the same hold true for the 2.5-liter version, we'd expect the next Forester and its ilk to come with roughly the same 170 horsepower and 170 pound-feet of torque.

[Dark]

Originally Posted by RRnold

Didn't know you had an R1! It was the top until the S1000RR came out.


Back to the 3rd gen motor, this doesn't sound too appealing.

Despite all the changes and the claimed improvements to fuel economy and mid-range torque, actual output of the 2.0-liter engine is nearly identical to its predecessor. That means 146 horsepower and 145 pound-feet of torque, an improvement of four pound-feet.

Should the same hold true for the 2.5-liter version, we'd expect the next Forester and its ilk to come with roughly the same 170 horsepower and 170 pound-feet of torque.

No, I don't have one yet, but I rode my friend's. I'm still deciding which one I should go with. Easy-to-live-with Honda CBR1000RR or Cross plane crankshaft monster Yamaha R1. For a kind of small guy like me, Ducati is also a good choice, but it's not as balanced as R1, right?

back to the topic. 3rd gen boxer doesn't sound so impressive at all, but don't forget, it's not a DI equipped engine yet. We might easily get over 200 hp from 2.5L boxer if it's DI'ed.

[[es vi: eks]]

Heres the older rendering of the same motor.

[MajorMing]

If this is the engine toyota is trying to put into the ft86 it seems like they would have to do some serious tweaking to get to their goal of 200hp out of the 2.0L. The lowly forester only gets 146. The stats don't exactly wow anybody based on the comments on that website.

[chulooz]

Very exciting stuff, Im cant wait to see how it will handle modification. One thing I do not really favor is the plastic intake manifolds they have been using recently, I just dont like seeing part such as that being made of plastic I guess?