Almost's '10 NA Offroader

Here is the remade thread!
Since I haven't gotten a build thread on here yet, just going to post some stuff over from subaruforester.org.

It is a model 2010 Forester XS, with pure N/A powah.

Planned mods:

Bars and Racks
Sump guard and Rear skid plate.
Side Steps/Rocksliders
UEL Headers(if I can find some...)
New axle back exhaust(new muffler or straight through)
New rims and A/T tires
Lights and Radio gear
King springs with the Primitive gear(spacers, PRSS etc)

More to come

This is as it stood when I got it, clean, with no mods! :tissue:
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And now the bullbar is on!
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Yeah I will definately look into this. Hopefully I can get it on a dyno to do a baseline tune and see what the low end looks like.
Even with the lower part of my intake blocked off, the top scoop is honestly double the size of the stock one.
But yeah, these things are tuned by subaru to the decimal MAF reading, so anything off can screw it around....

And because I wanted even more power, I filled up with the good juice!
So it seems that the fuel warning light comes on after I've used 50 litres. So I believe the tank holds 60, so that's 10 left. Good thing to know.
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Ahh jealous :raspberry: you are still able to buy 100. United stop selling it over here in WA due to a lack of demand. Aussies best bowser juice by a long shot.

Biggest cause of screwing with airflow that affects the MAF sensitivity is aftermarket airboxes that have the MAF sensors location next to a bend in the pipe.

You should be ok there as yours sits in its stock location :). If you are going to a tuner, decide what fuel is available just about anywhere and get the tuner to re-tune for that.

Remember, car re-tune on say 91 is safe to run on a higher octane, but NOT the other way around. ;) ...Pop goes the wheezle
 
Yeah only a few united in Sydney stock it, none near me. The station where I get it is Michelago united, just before bredbo.

Yeah I would love to get a 100 tune but won't have it all the time so will just get a 98 tune. There is a BP near me and BP 98 is the most fuel efficient apparently.
 
Well I figured out my issue of no power at low rpm...... My intake!
Long story short all the fancy resonator thingos in the stock intake serve a purpose in N/A engines, not so much in turbos(where I was getting all my info from).
After reading this article it explains why I was getting crap low rpm power, but when I got into high rpm's the engine was awesome....
So now that my stock airbox is back on, I should be able to get up the friggin mountain now!

Heres the article if you are interested, graphs at the bottom of the post.
https://www.dirtyimpreza.com/forums/showthread.php?4570-A-Major-Problem-with-NA-Subies-and-CAI-SRI-Intakes


If anyone with an SH XT is after a carbon intake box, shoot me a PM
 
^ Surprise, surprise - the FHI engineers have some vague idea about what they designed ... :iconwink:.

I like his comment:

"The intake tract of a car is like any wind instrument: blow air through it and noise will result. In the case of the car, we also have the intake valves acting like the lips of a person blowing a raspberry into a tuba."

Sounds strangely familiar, perhaps this:

https://www.offroadsubarus.com/showpost.php?p=82467&postcount=59

... :) :cool:.

I have bookmarked that URL you posted, thanks :biggrin:.
 
Haha yeah I have been a bit over confident in myself. But hey, for science! Now I understand first hand how finicky these engines are, and I thought you were over exaggerating!
Because everything I read said the resonator things and snorkus thingos were only for sound muffler purposes, which is true in the turbo, but not the N/A.

So now my hybrid airbox design "should" work as much as scientifically possible, since all I'm doing is putting more air into the factory scoop intake, and retaining all the factory airbox.

By reading that article I think I can do some scientific testing by testing the pitch of the air going into the airbox after the snorkel, I have a tuning app on my phone for the band :)

Sent an email to a local tuning place who does EcuTek tuning, $1800....... Blimmin ecutek licence fees. The shop is very nice and they have a proper dyno cell with hub dyno, so the place tunes well by the looks of it. I just have to find out whether they offer free retunes so if I change anything else around they can tune out my mistakes :raspberry:
 
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^ I'm really glad that you have found the cause of your problem, Au.

It is simply amazing the degree of finesse that has gone into the design of the intake system from the EJ-253 onwards. Even though SWMBO's SH has an EJ-253 in it, there are further subtle differences in the design of the intake manifold from the one in my series II SG. For one thing, it is longer by about 25 mm higher on the vertical part just before the tumbler valves.

It could be that this is due to it being a 4EAT Sportshift rather than the 5MT/DR, but I think not. The engine type on the P/S compliance plate has a different prefix as well.

Methinks it pays to be very careful when modding any really modern engine ...

AND $1,800 does seem more than just a little over the top!! :(
 
Contact Throttle Happy tuning solutions. Had my GT Forester an XT auto forester and XV tuned by him. The XT had an Ecutek tune before and this new one made fuel efficiency n the auto tranny 5x better.
 
Yeah I was looking at getting a TH tune but he hasn't been to sydney for a bit.
He had a very good price, so will get in contact with him to see when he's next in sydney.
Did he flash and road tune yours or dyno tune?

EDIT: Ok PM sent to TH, hopefully he's in sydney February.
 
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Just BTW, Au, I very much doubt that all the dingles and dongles are just to dampen the intake sound in the XT either ...

Noise = non-chaotic turbulence; which = changes to the laminar flow characteristics of the intake gas flow. I don't know, but I suspect that turbo engines can be just as sensitive to this as N/A engines. The effects may be masked by the grunt of the turbo donk, but they would still be there IMO.

Getting rid of the noise has to improve the flow characteristics of the inlet gas. Just thinking about the problem from a logical POV. The tiny little tabs on the ends of jet aircraft wings remove chaotic flow making the flow more laminar. IIRC, this improves fuel economy by around 10%, at a significantly higher speed (about 5-10 mph).

While it is great for the flow into the combustion chamber to be chaotic (but in a controlled manner - hence the tumbler valves), flow in the intake manifold up to this point should be as laminar as possible AFAICS.
 
Ratbag said:
The effects may be masked by the grunt of the turbo donk, but they would still be there IMO.
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This is what I read, that becuase the turbo is always basically pulling air at a higher than normal(when compared to N/A) rate, it negates a lot of the issues.

But yeah thinking about it, they would still have issues.

I just can't find any hard evidence about this topic anywhere. Every white paper, review and article seems to say differently....

But hopefully TH can work his magic with my snorkel!
 
The beauty of the Internet - everyone (me included ... ) has a theory, but very few hard facts anywhere!

I try my best to use what logic skills I possess to work out what is likely to be 'correct', at least in part, and what is likely to be arrant nonsense ... Sometimes I get it right! :iconwink:
 
I was just going by the age old theory of performance, more air=more powerrrrr :P
Heading up to tom groggin again tomorrow, so will see if I can get up the steeper hills now.
 
Hope it works better for you, mate.

Have a terrific day. Play safe.
 
Thank you, you and your family have a good break and new year!
Looking forward to seeing what everyone on ORS has planned for 2015!
 
Thanks and :biggrin:.

I am hoping to eventually get to go to Brisbane. The long way up, and the even longer way back ...
 
Up via mid-western NSW, back via far western NSW. Stay with my brother and his wife for around 4-6 weeks in Brisbane. See other rellies and friends while I'm there.
 
Ah going super deep in, should be some nice long driving :)
We don't know where to go for next year, not really ready for long trips yet, so we may just do some more short trips down to Vic, maybe explore down Omeo. And then do some nice camping trips around Newnes, Bells line of road, lithgow, and down to Oberon, with dingo dell there.
 
Interested to know what spring / strut set up you have installed. Can you advise the part numbers as well?
Also what is the tyre size that you got off Will.
Cheers
 
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