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Old 01-15-2009, 12:42 PM   #1
subie_hatch84
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Default LaChute Intake for 2.5i?

I forgot where I read this... it was on here somewhere, but there was a post about La Chute developing a CAI for the 2008+ N/A imprezas... Anyone know anything about this? Updates?

Side: Also wondering, is there a company that makes intake manifold &/or throttle body spacers for '08 imprezas?

thanks,

-Z
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Old 01-15-2009, 01:47 PM   #2
watchunglava
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personally if i had the 08 , wait what am i saying i would never ever ever buy an 08 subaru . but i digress.

your manifold looks like garbage . do you have any flow charts? 08's make less ponies than my 07 . wonder if its that plastic manifold that sits right on top of super hot engine , at the top of the engine bay ( hot air rises) first thing i would do is spend the $50 and get an older manifold and see if i couldnt swap that just to see how it goes.

then get whatever intake you want for a prior year
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Old 01-15-2009, 01:52 PM   #3
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For all of you N/A Lovers we just released our new CAI for 08/09 2.5I



:arrow: 345.00$ USD


Small vid
http://ca.youtube.com/watch?v=D-jIQ95W39w

Dyno Results Before / after !


An Average of 7 Hp & 10 Fts Pounds torque
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Old 01-15-2009, 01:54 PM   #4
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damn kids $350 free shipping!!!!!!!!!!!jdm style!!!!!!!!!!! added hp!!!!!!!!!!!!!!!!

i thought the 08's had the plastic manifold? thats an 08 you have pictured there? you guys swapped the manifold?
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Old 01-15-2009, 04:53 PM   #5
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How much of a horsepower increase does this CAI add over stock?

Would this intake produce better gains compared to the Hybrid DIY CAI in this other thread?
http://forums.nasioc.com/forums/show....php?t=1655076

Thanks,
Cam
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Old 01-15-2009, 05:23 PM   #6
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Quote:
Originally Posted by watchunglava View Post
damn kids $350 free shipping!!!!!!!!!!!jdm style!!!!!!!!!!! added hp!!!!!!!!!!!!!!!!

i thought the 08's had the plastic manifold? thats an 08 you have pictured there? you guys swapped the manifold?
dude... naw

we dont have a plastic manifold. dont know where you heard that. We make 3 less hp because of the ECU tune. As a result, we make a couple more ft-lbs.
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Old 01-15-2009, 05:28 PM   #7
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wow, $350 is absolutely rediculous. ill stick with the hybrid set up for $70. anyways, do the 08s have the cold air intake lag problem the other models did?
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Old 01-15-2009, 05:33 PM   #8
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7 HP seems a small compare to the 15 HP or so gain for the 06-07 posted on this forum.
Maybe the OEM intake for the 08-09 is already improved over the OME for the 06-07 ???
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Old 01-15-2009, 05:58 PM   #9
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iv heard good things about all subaru air boxes honestly. they are good at makin power. thats why i think im stickin with the hybrid set up
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Old 01-15-2009, 06:01 PM   #10
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i guess the 08 still has the metal manifold then . this is the 09

jerry the 08 makes less power than the 07
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Old 01-15-2009, 06:19 PM   #11
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thats becasue thats a wrx. no idea whats happening there.

again, 3 hp difference due to tune between 07 and 08. Im willing to bet the CAI doesnt add as much hp because of this torque favoring ECU. A tune should provide substantial gains.
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Old 01-15-2009, 06:24 PM   #12
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can i see your rom for the 08? i would love to see what the difference is in the tune.
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Old 01-15-2009, 06:24 PM   #13
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watchunglava, only the '08/'09 WRX have the plastic intake manifold. The STi and 2.5i kept the metal.
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Old 01-15-2009, 06:27 PM   #14
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ohh true that ! good to know . my bad then .

still though the stock ecu tune? its the same motor. what about the tune makes less hp?

i thought the lower hp is because of the different exhaust set up
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Old 01-15-2009, 07:00 PM   #15
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pretty sure i read that they used a slightly different map that optimized torque over hp. which makes sense when you consider that theyre trying to appeal to a more and more general audience. The people are going to want the most power from 1-3, not 4-6, so as to save gas. cant imagine the exhaust making the diff because the 4 door and 5 door ahve the same outputs, but i could be wrong.

were talking about +/- 3 hp here its something that could have just been an afterthought.
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Old 01-15-2009, 08:24 PM   #16
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Hey thanks for the posts and the info... watchunglava, thanks for the advice... sorry you got that wild hair up your butt though



-Z

Last edited by subie_hatch84; 01-15-2009 at 08:31 PM.
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Old 01-15-2009, 08:41 PM   #17
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i got a hairy ass yo! my wife, is an estethisian i think thats how u spell it . whatever she gives facials and wraps and stuff , is allways trying to wax my ass!!!

im not sure why you would be concerned with that though.

im serious can i see your ecu rom? i reall want to check out the differences
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Old 01-15-2009, 09:08 PM   #18
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man to be honest I don't know a whole lot about ecu/ electrics... on the mechanical side im square, electronics however, I always seem to get electricuted or something... how do I go about getting all the graphs and stuff? I have heard about rom raider, I just don't know how it all works.


-Z
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Old 01-15-2009, 09:59 PM   #19
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so then you realize whats going on with ignition timing and afr's and things of this nature?

if so 90% of the battle is won, and you could start tuning your ecu for under $100. i do believe they recently released the definations for your car.

if you do some reading there is plenty of info on here. just post in the correct forum and people will help you out.

i will say this with certainty though , if you put an intake on your ride you better be able to tune the ecu or else it wont be very drivable.
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Old 01-16-2009, 01:07 AM   #20
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i thought the HP difference was not because of a tune but because of a change in how the HP is rated...didn't the standards change between 2007 and 2008?
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Old 01-16-2009, 01:16 AM   #21
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really so since Watt it has been the same but now it's different?

The following definitions have been widely used:

Mechanical horsepower
hp(I) ≡ 33,000 ftlbf/min
= 550 ftlbf/s
= 745.6999 W

Metric horsepower
hp(M) ≡ 75 kgfm/s

= 735.49875 W (exactly)

Electrical horsepower
hp(E) ≡746 W
Boiler horsepower
hp(S) ≡ 33,475 Btu/h
=9809.5 W

Hydraulic horsepower =Flow Rate(US gal/min) * Pressure(psi) / 1714
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Old 01-16-2009, 11:04 AM   #22
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Quote:
Originally Posted by zavier View Post
i thought the HP difference was not because of a tune but because of a change in how the HP is rated...didn't the standards change between 2007 and 2008?
Quote:
Originally Posted by watchunglava View Post
really so since Watt it has been the same but now it's different?

The following definitions have been widely used:

Mechanical horsepower
hp(I) ≡ 33,000 ftlbf/min
= 550 ftlbf/s
= 745.6999 W

Metric horsepower
hp(M) ≡ 75 kgfm/s

= 735.49875 W (exactly)

Electrical horsepower
hp(E) ≡746 W
Boiler horsepower
hp(S) ≡ 33,475 Btu/h
=9809.5 W

Hydraulic horsepower =Flow Rate(US gal/min) * Pressure(psi) / 1714
The definition of HP is not what is in question. That is a constant in today's world.

What was said was that PEAK torque and HP changed between the two years. HP and torque are both dependent on engine RPM, so that's your X axis. What is important is that Subaru has changed the shape of the graph (through tuning such as timing and fuel trim adjustments, and/or mechanical adjustments, such as a different cam profile) in a way that a sacrifice in PEAK HP has created an increase in peak torque.

Hopefully, these changes raised torque everywhere, as peak torque is not nearly as important as the torque band, or "area under the curve" as many like to say. This provides for more drivability under 'normal street' conditions. Just as drag cars are concerned with peak numbers because they are geared for the highest possible output over a quarter mile, most street vehicles are more concerned with numbers in the 1000-3000 RPM range, as that is where they operate most frequently.

What was also said is that the way HP is measured in SAE tests (which is the standard for bhp and torque measurements in the automotive industry) changed. However, I am not sure when Subaru started listing their numbers as SAE-certified.

watchunglava, since I can see you like Wikipedia, scroll down on the same page you got the HP defs from and look at SAE certified HP. zavier, prior to 2005, SAE net horsepower was used starting in the early seventies. Since it's a voluntary change in measurement, Subaru could have started with MY2007, but I have no evidence of that. Some manufacturers lost HP, some gained, and even looking at the same manufacturers, certain engines lost/gained power. However, the shape of the curves would remain relatively the same.

I have been wondering about the SAE changes myself for a while, so thanks for providing me with the motivation to research it myself!

Here's the link to SAE's web site detailing certified power: http://www.sae.org/certifiedpower/

Cheers,
Aaron
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Old 01-16-2009, 11:49 AM   #23
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I'd rather have the plastic intake manifold assuming the reliability is the same. Lighter, less thermally conductive, and just as strong.

And hot air doesn't rise in a moving cars engine bay. It gets blown out at whatever speed you are going. Again, I'd rather a lightweight plastic that may heat up faster as it will certainly cool down faster.
Conductive heating is what you want to worry about w/ an intake manifold (hence the grimmspeed spacers), not convective heatings.
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Old 01-16-2009, 12:06 PM   #24
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since the powerband is geared more toward the mid range... is there much you can do with the stock airbox to pull that peak HP down a little?
Piggyback controler with a stock setup? http://www.apexi-usa.com/product_ele...=202&pageNum=1

I was more concerned about trying to accomplish this... manipulating the tourque/HP curves
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Old 01-16-2009, 12:09 PM   #25
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^^ Ya. If the plastic manifold is good for the WRX's turbo, it should be safe for the 2.5i correct.
Back to the topic for a moment of HP gain with the intake. 7HP is only half compare to what we were able to get for our cars.

http://forums.nasioc.com/forums/show....php?t=1156560
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