Did you know...(subaru boxer)

[Urabus GodofTraction]

Yep. The Borlas are unequal length.. I think the OBX are equal length and make Subaru's sound like Hondas. Bleh.Got a dual-tip Stromung cat-back to top it off. Dale at Boxer4Racing is the man! We talked about Subies for a while on the phone

The real problem with aftermarket UE manifolds is that nearly identical gains are made porting and polishing the stock ones.

Stromung is good stuff! If the STi muffler wasn't nearly exactly what I was looking for and cheap, I would have really looked at the Stromung stuff.

[skydragoness]

Meh. W/ labor? Who's going to port/polish a 9-10 yr old rusty exhaust manifold?I'm getting my 2.2's heads ported and polished for a nominal fee .. does that count?

I would get the STi exhaust but the flange needs to be taken off and re-situated from what I hear to fit on the GC chassis. Was going to get a Borla "Hush" but was told the quality and fitment isn't good, and I heard about SPT's exhaust having crappy welds and not being worth the money. Meh, there's nothing out there for the GC! Thank goodness for Stromung, the bf's and my friend's RS have Stromungs.. they sound incredible. And not too loud either.. it's 'just right'

[RCA]

If you picture the engine half way through its compression stroke The rod is angled from having the small end near the center of the bore and the big end on the crank journal off to the side. Since the force on the top of the piston is not pushing directly through the connecting rod to its axis it creates some torque about the crank journal and "stuffs" the piston into one side of the cylinder. The very very small weight of the piston is nothing compared to this thrust force, so its not like on an inline engine the piston was floating in the center of the bore anyways.

However it rides on one side for the compression stroke, and flops to the other for the power stroke (the connecting rod is angled one way on one, and the opposite on the other). Since the force on the piston is way way more on the power stroke then on the compression stroke it DOES wear more on one side then the other anyway, on any reciprocating IC engine. Its called the major thrust surface of the cylinder bore.

Yea I remember reading your resonces in the engineering forum

To be honest I don't fully understand what you wrote.I also found this http://forums.nasioc.com/forum...07570But I am not sure where exactly they speak of Major Thrust

[Zydeco]

Im very fond of my Cobb exhaust. quite at idle and when on the freeway and sound mean and nasty at full throttle.

[LongBeachCoupe]

I had no idea it was flat like that, seems very awkward... but its alive!

[Urabus GodofTraction]

Meh. W/ labor? Who's going to port/polish a 9-10 yr old rusty exhaust manifold?

My head will forever calculate car part costs Challenge style. My labor isn't included in the budget!

But you make a valid point.

Edit: holy hell! I just priced out those Borla headers... $500! That's a lot of labor!

[Red coupe]

My labor isn't included in the budget!

I got a free toilet paper roll holder tonight, made from scrap





I needed one, and I had the stuff to make it. Damn were people giving me weird looks when I told them what I was working on. Cheapness of DIY FTW. [/f***ing random]

Yea I remember reading your resonces in the engineering forum

To be honest I don't fully understand what you wrote.I also found this http://forums.nasioc.com/forum...07570But I am not sure where exactly they speak of Major Thrust

Its really not that complicated man. You know, you push on something... it pushes back on you. The connecting rod is held by two pins, so the only direction it can push is along the line that connects the two pins it rotates about. As the piston moves through its stroke the connecting rod is only vertical at the top and the bottom. When the connecting rod is not vertical the force it pushes back with on the piston is aimed off to the side.The force on the top of the piston only pushes directly down, so the piston is pushed at an angle into the side of the cylinder wall by the connecting rod.

Think of it like pedaling a bike. when you step on the pedal it not only moves down, but forward as well (as the pedal rotates through its circle its not JUST moving straight up and down.)Well the piston wants to do the same thing, but the cylinder wall stops it.

[s0m3th1ngAZ]

Don't they have a tendancy to leak a lot out of the HG and Valve cover? Seems like every subaru that came into our shop leaked profusely from the gaskets.

[Urabus GodofTraction]

Don't they have a tendancy to leak a lot out of the HG and Valve cover? Seems like every subaru that came into our shop leaked profusely from the gaskets.

The 2.5L DOHC n/a engines are sieves.

Every other engine is bullet-proof.

[Zydeco]

that sucks, I dont know anyone with a subie that docent have a turbo on it.

[sebazztard]

The 2.5L DOHC n/a engines are sieves.

Every other engine is bullet-proof.

knock on the entire forest in this state, my gf's 2.5 has been a blessing, despite the oil leaks i have to take care of. almost at 160k. 1998 legacy gt limited edition sedan. i love the car. my parents bought a 98 legacy outback with the 2.5 and at 70k miles the headgasket was toast. he (my dad) swapped the 2.2, and hasnt looked back since. 2.2 is BULLETPROOF (i sold my beater with 345k miles a few months ago in favor of a 92 240 coupe). lol ive noticed a trend in subie talk here lately, i could go on for days. i grew up with them starting with an 90 loyale, and my first car was a 86-gl with 30k miles in 1999...yea they used to have a tire under the hood, kids..can i finally say that at 28 years old?

[MinisterofDOOM]

knock on the entire forest in this state, my gf's 2.5 has been a blessing, despite the oil leaks i have to take care of. almost at 160k.

160k really isn't anything praiseworthy. I mean my Maxima's at 250k and doesn't leak ANYTHING.

[sebazztard]

on the 2.5 dohc subaru engine... apparently you skimmed through the entire thread and are unaware of the massive failure of these headgaskets? lol. its not a mileage competition...

[MinisterofDOOM]

I read the thread. My point was that oil leaks at 160 on a late-90s Japanese cars does not fit my definition of "blessing."

[sebazztard]

man ...im talking about the headgaskets!!!!!!!! lol. forget about the oil leaks for a sec, shes on the original head gaskets, usually they fail at very early mileage. seals on these are just part of maintenence, like the timing belts.

[MinisterofDOOM]

man ...im talking about the headgaskets!!!!!!!!

I know. And I'm talking about oil leaks.

[sebazztard]

you sure you know lol. i dont claim oil leaks at 160 to be a blessing, but the headgasket is. i like how quickly you reply, you must refresh recent topics like i do haha.

[MinisterofDOOM]

Yeah, I see. You're just glad you haven't had to deal with them yet like most 2.5 guys. Which is definitely nice. I guess I'm just spoiled by my VG.

[sebazztard]

yup thats the blessing im talking about. sorry for the confusion but this dohc was my main worry when we were car shopping 2 years ago. not too much went wrong with it in the last 2 years but it def needs some downtime so i can replace the seals and the timing belts. if the headgaskets go , which it seems 99% of them do, its 2.2 swap time. its amazing how much labor and $ it costs to change out these headgaskets.

vg's are great, as well as all nissan, and subaru motors. they all have there faults but yes, ive been lucky with this one. i would love to have a na z32 as a summer dd in the near future gotta park all these s13's tho haha.

some reading material http://users.sisna.com/ignatiu....html

[The_Chosen_One]

sTm[-HeavyHips]that sucks, I dont know anyone with a subie that docent have a turbo on it.

now you do

2005 Subaru Impreza 2.5RS 2.5L SOHC BOYEEEE

[corey240]

I love intelligent conversations! Seriously, I want to get a subi for a daily. There is slightly more wear on the bottom.

The piston pins are offset to compensate for the movement of the rod/piston so its that there is less or no piston "slap" or "tap". Just remember, a seasoned engineer team designs things like this. And test everything. They will allways have asked the same questions you have befor the thing ever got produced. Usually you can answer your own questions thinking this way.

[RobPaulson]

news to me ... thats effn cool!

[ScrapMetal]

More boxer love



My 71 Squareback's flat 4.

[RCA]

Its really not that complicated man. You know, you push on something... it pushes back on you. The connecting rod is held by two pins, so the only direction it can push is along the line that connects the two pins it rotates about. As the piston moves through its stroke the connecting rod is only vertical at the top and the bottom. When the connecting rod is not vertical the force it pushes back with on the piston is aimed off to the side.The force on the top of the piston only pushes directly down, so the piston is pushed at an angle into the side of the cylinder wall by the connecting rod.

Think of it like pedaling a bike. when you step on the pedal it not only moves down, but forward as well (as the pedal rotates through its circle its not JUST moving straight up and down.)Well the piston wants to do the same thing, but the cylinder wall stops it.

Now I realize you were praticaly explaining logic. I get it now Much appriciated and sweet toilet paper holder

[darens13]

may have been mentioned earlier but.. corvair corsa.