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Old 09-15-2005, 10:52 AM   #1
BrysImpreza
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Default Anyone pick up a 2006 2.5 yet?

I'm just curious to see if the revisions to the 2.5 liter N/A can be felt / seen? They're claiming better gas mileage, more HP and faster acceleration. Anyone pick up a 2006 2.5i Sedan or Wagon yet?

Time for a motorswap?
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Old 09-15-2005, 11:24 AM   #2
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No,
But what is the diffrences enternally?
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Old 09-15-2005, 11:36 AM   #3
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Well supposedly it has direct port injection and variable valve timing, good in theory, but it could become more moving parts that can fail and become expensive to fix.

I'm curious to see if its MAF or MAP based since Subaru LOVES to change that for no good reason every few years.
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Old 09-15-2005, 12:55 PM   #4
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Quick peek under the hood or even a very quick underhood photo should answer the MAF question, though it's my understanding the 06 is pretty much the 05 engine with AVCS. I haven't gone to look at the 06 yet either, but may go today.
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Old 09-15-2005, 12:59 PM   #5
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what would the avcs do on a 2.5 n/a? just smooth out the powerband and maybe give some more power up top?
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Old 09-15-2005, 01:06 PM   #6
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173HP, TQ remains the same.

Haven't peeked under the hood of a 2.5i yet but my local dealer's got a few on the lot I could check out.

Bill
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Old 09-15-2005, 01:25 PM   #7
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Quote:
Originally Posted by svek
what would the avcs do on a 2.5 n/a? just smooth out the powerband and maybe give some more power up top?
Yes.

I'm interested to drive a 2.5i and see how different it feels from my 05.
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Old 09-15-2005, 03:03 PM   #8
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from what I read in the subi sport mag you can notice a difference, I wanna check it out, I wanna swap the intake mani with mine
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Old 09-15-2005, 04:12 PM   #9
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I'm just curious because with all the changes Subaru has made to the EJ25 over the years, it has only increased HP by 1 since ummm 1996?

Only took 10 years! WOO! And since Honda has a 2.2 liter hat puts out 240HP and Mazda has a 1.3 liter at 260HP!

*sarcastic golf clap* Good Job Subie!
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Old 09-15-2005, 04:24 PM   #10
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I'm going to recieve my 2006 2.5i in a weeks time. Appearently they have not hit the shores yet, atleast in Ontario. I only got to test drive the wagon, not the sedan. Since the torque has not changed from the 2005 I don't see there being a major increase in accelerating. But more horsepower is better then the less so.
More updates in a weeks time.
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Old 09-15-2005, 04:24 PM   #11
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Sorry, guess you didnt get the memo, the RX8 makes 197, or 238 hp. And after they test it using the new SAE method, likely 175-215 hp, all that and 14 mpg, too!
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Old 09-15-2005, 04:56 PM   #12
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06 still have MAF,

Here's a engine pic I took of a 06 2.5i Wagon:



TQ Can get you around traffic but HP makes you go fastar, lol
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Old 09-15-2005, 09:27 PM   #13
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Comparing the RX8 engine to any other piston engine is like comparing apples to bowling balls. Rotary architecture just inherently has far different power and torque generating characteristics that you can't compare them side-by-side. The Honda 2.2 in the S2000 is a high-strung performance engine in a premium sports car. You're comparing a econo-compact engine to a sports car engine. For that matter, we're comparing TWO sports car engines to a grocery-getter engine.
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Old 09-15-2005, 10:28 PM   #14
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This Subaru performance mag says taht the new 06 impreza has a "new i-Active Valve Lift system, which varies the amount of valve lift relative to engine speed. At low rpm, intake valves are set for low and mid-lift. These valve positions swirl and accelerate the air as it goes into the engine, which improves combustion and results in higher torque. At high rpm the system opens the valves even further, which decreases resistance to intake airflow. Again, the result is greater power. Besides increasing power output the i-Active Valve Lift system improves driveability as well."

Hope that helps yah!
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Old 09-15-2005, 10:47 PM   #15
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Quote:
Originally Posted by FalconRS
Comparing the RX8 engine to any other piston engine is like comparing apples to bowling balls. Rotary architecture just inherently has far different power and torque generating characteristics that you can't compare them side-by-side. The Honda 2.2 in the S2000 is a high-strung performance engine in a premium sports car. You're comparing a econo-compact engine to a sports car engine. For that matter, we're comparing TWO sports car engines to a grocery-getter engine.
But but from 1998 - 2001 this very engine was stated to be a SPORTS CAR ENGINE for the US market. So I don't really see your point.
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Old 09-16-2005, 12:17 AM   #16
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stay on topic peoples... this is suppose to be about the 2006 2.5i motor not rotary craps.
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Old 09-16-2005, 11:13 AM   #17
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Quote:
Originally Posted by BrysImpreza
I'm just curious because with all the changes Subaru has made to the EJ25 over the years, it has only increased HP by 1 since ummm 1996?

Only took 10 years! WOO! And since Honda has a 2.2 liter hat puts out 240HP and Mazda has a 1.3 liter at 260HP!

*sarcastic golf clap* Good Job Subie!

lol so go buy one :P

the 2.5RS being their lower output base type motor, its not gonna get the attention to power or development that the STI and WRX motors are. Think about it. If they made a NA 2.5 motor comparable to the WRX power output it would kill their market for a lower priced alternative to the WRX.
Who said they had to make the EJ25 comparable to Hondas 2.2 and mazdas 1.3? They produce newer motors to compete with those (again, the STi motors)
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Old 09-16-2005, 09:14 PM   #18
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Quote:
Originally Posted by BrysImpreza
But but from 1998 - 2001 this very engine was stated to be a SPORTS CAR ENGINE for the US market. So I don't really see your point.
For the US market...they slapped RS (rally-spec) on there to target younger buyers interested in things like that. Sports cars are not about going fast...

And about the 2.2 Honda and 1.3 Mazda...want to bet that our cars have tons more torque than either of those?
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Old 09-16-2005, 09:25 PM   #19
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The new 2.5 motor is fantastic. The version in last year's Legacy (rated at 168hp) was significantly faster than the previous version (rated at 165hp).

I was working for a dealer at the time, and took one home as a loaner. Legacy base model wagon, with auto trans, with 4 people in the car, vs. my roommate's modified '99 2.5RS, with only him driving... and the Legacy was faster.

The new engines are fantastic, especially the new i-Active valve system. They make significantly more torque on the bottom end than previous versions, and more top end hp.
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Old 09-16-2005, 09:38 PM   #20
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The 06 EJ25 has 173 horsepower and this is mainly due to a new equal length exhaust manifold as well as the i-Active Valve Lift System. In english terms, there is valve overlap during the intake stage, which causes an intake vacuum effect as well as a nice combustion mixture.

I'd like to hear what a catback sounds like on the 06's.
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Old 09-16-2005, 10:46 PM   #21
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You can't really count the rotary engine as 1.3L. It makes 3 rotations per cycle between 2 chambers. The displacement is actually 2.6L.

http://www.rotaryengineillustrated.com/re101/cycle.php

C
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Old 09-17-2005, 12:35 PM   #22
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We picked up our 2006 2.5i wagon last Saturday. We seem to be averaging 32.6 mpg. As to the power of the engine, the active valve lift is noticable above 3600 RPM. The engine seems more willing to rev than the 2005 however we are still in the break in period for 30 more miles and I will be able to report on romps to redline after that. As far as low end and midrange power improvements, the mid range improvement is somewhat noticable although you would be hardpressed to seat of the pants notice improvements in the low end. I would really like to see a dyno comparison between the two model years.

We are very happy with the 06. It is the wife's car and she commented on the better power of the 06 in the midrange. So it is noticable when driving the cars back to back.

Overall the 2006 engine feels stronger than the 2005 and I am anxious to finish the 1000 mile break in to see how the upper end of the rev range feels.

I will try to g-tech the car next week and post its results.
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Old 09-17-2005, 12:45 PM   #23
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32.6 mpg!!?
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Old 09-17-2005, 01:01 PM   #24
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Quote:
Originally Posted by Caplin 2.5
32.6 mpg!!?
Tosses keys at the dealer and gets into a 2006 2.5i Wagon
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Old 09-17-2005, 01:54 PM   #25
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Yep 32.6. First two tanks have both been about equal on mileage we are working on the third tank now and can post mileage later if you like. We track all our vehicles for fuel mileage and have extensive records for everything. We did not expect it to be this high based on the window sticker.
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