Official Pittsburgh Thread V7.14159

[Moore Performance]

We're compiling a list of things were planning to sell since our shop merger at our new location, and we have TONS of things finding their way on the list including many OEM subaru parts, but here's a just a few of the things we have sitting around that you guys might be interested in:

- non running 2000 2.5 RS 5 speed
- 2 different engine hoists
- 2 front Brembo sti calipers w/ new bleeders
- Invidia quad tip catback (08+ sti, etc)
- multiple ej20 shortblocks (need rebuilt)
- injectors (top feed FIC 1680’s and DW 1300’s)
- GT Spec UEL header w/38mm ewg provision
- Grimmspeed uppipe with 44mm EWG
- AVO ball bearing turbo
- Blouch Dom 4 XTR (low miles)
- AEM Series 1 EMS for single avcs sti


Shoot us a pm if you're interested in anything

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[MRF582]

"Opus is the result of a collaboration between Xiph.Org, Mozilla, Microsoft, Broadcom, Octasic, and Google."
http://opus-codec.org/comparison/

And it's been standardized as RFC 6716! The world of audio codecs just got a lot simpler.

[glhs377]

that's pretty rad! way bigger step in consumer electronics than iphone5

[saabarupp]

Originally Posted by ForceFed2.5

Random and not car related.

Any home brewers on here that want a case of 20 empty Hofbrau 500ml bottles? I was saving them for a friend but he only does kegs now. Let me know and you can have them because i'm tired of looking at them and hate to recycle them if someone can use them for their brews.

Maybe if they were 22oz

[glhs377]

Ryan, email me all the info and pics on that RS, TONITE! not for me, have a friend lookin for one. hey may buy a blown engine too... or a good one, who knows. he pretty much hates his 08wrx.

[Blinden]

Does anyone own an 08 wrx that doesn't hate it?

[isis]

What's wrong with them? Besides appearance that is

[Blinden]

Nothing 'wrong' with them, but they made some improvements for MY09, leaving the people with 08's pretty upset.

it's been 4 years since I've driven the 04 STi I had, but, I stepped down to the 2.0l wrx after that, and then back to the 2.5l wrx now, and I don't feel like my car now, with the same mods as my STi had, is any slower, likely would run a 1/4mile a little bit quicker I would venture to say. I know there are plenty of other considerations, but, IMO, if you are considering only power, there is no gap between the current generation WRX and STi that would justify the cost.

[stealthx32]

Inb4jasonsayssomethingaboutdiffs.

[saabarupp]

Originally Posted by stealthx32

Inb4jasonsayssomethingaboutdiffs.

ortransmissionorbrakesorsuspensionorcloseddeckorst eeringrackorbushings

[FXTSPORTS08]

YouTube (Short URL)

YouTube (Short URL)

[explicithero]

Originally Posted by FXTSPORTS08

Video Link: http://youtu.be/_rusuuZSoLc

Make sure you don't heat wrap or thermal coat that thing, it will only hurt its performance.

[MRF582]

Originally Posted by explicithero

Make sure you don't heat wrap or thermal coat that thing, it will only hurt its performance.

AFAIK, Vindler disagrees with that statement. I have yet to hear a proper explanation for why but he has been busy so I'll let it slide.

I want to see your maths.

[bettner12]

Let's see YOUR maths. Goes both ways

[isis]

Originally Posted by bettner12

Goes both ways

Like your mom

[FXTSPORTS08]

Originally Posted by isis

Like your mom

LOL

I actually did sit down and look at the equations a couple weeks ago but honestly its been too long since college, I would definitely have to spend some time to get back into it before I could make a solid statement with proof.

[Holden11sti]

im trying to buy an early 2000's subie to build into a rallycross car. Just thought i would throw it on the hometown thread.

[MRF582]

Originally Posted by bettner12

Let's see YOUR maths. Goes both ways

He and I already talked about this. The error in assumption that Vindler made I believe is he assumed a constant mass flow rate in. A turbocharger's mass flow rate depends on on the resistance to flow post turbine. Sure heat increases velocity but reduces the pressure ratio across the turbine. And we all know that turbos work off an energy differential.

FWIW, Jason ALSO did the math years ago and found significant reductions in mass flow rate if the exhaust is heat wrapped post turbine. Of course, you want to wrap the exhaust portion that can heat soak the rest of the engine bay so it's more beneficial to wrap at least the 1st half of the downpipe but nothing later. I'll let him speak more on it.

I'm just here to coordinate the discussion between Jason's and Vindler's maths. Let's see who's right!

[garagedefeat]

Originally Posted by Holden11sti

im trying to buy an early 2000's subie to build into a rallycross car. Just thought i would throw it on the hometown thread.

i have an 00 rs 2 door. pm me if interested.

[stealthx32]

Originally Posted by MRF582

He and I already talked about this. The error in assumption that Vindler made I believe is he assumed a constant mass flow rate in. A turbocharger's mass flow rate depends on on the resistance to flow post turbine. Sure heat increases velocity but reduces the pressure ratio across the turbine. And we all know that turbos work off an energy differential.

FWIW, Jason ALSO did the math years ago and found significant reductions in mass flow rate if the exhaust is heat wrapped post turbine. Of course, you want to wrap the exhaust portion that can heat soak the rest of the engine bay so it's more beneficial to wrap at least the 1st half of the downpipe but nothing later. I'll let him speak more on it.

I'm just here to coordinate the discussion between Jason's and Vindler's maths. Let's see who's right!

No one cares.

Also, heat wrap makes your **** rust.

[Burdman412]

Hey fellas. Been a while since I've been on here but I have some stuff for sale if anyone is interested. 04 STI drivetrain minus the engine, DCCD controller and driveshaft. I bought this off of Jared (wastingtime) a while back. I planned on putting this into my 2.5rs but I just do not have the time right now as I work 80-90 hrs a week and am on the road A LOT. Everything was inspected/gutted and declared to be in mint condition by AndrewTech automotive. There is 40k miles on everything.

Shoot me a pm if you're interested. I rarely get any free time to get on here so it will be easier to contact me by phone.

[MRF582]

Originally Posted by stealthx32

No one cares.

That's a tall statement which is quite difficult to prove but would take just one data point to disprove. You sure you don't want to revise the bounds of operation to 'most'?

[The1SloR/T]

Installed a header-back exhaust on a BRZ today. Once it warmed up the rasp went away. Doesn't sound too bad

SubaruWRXfan's New BRZ Exhaust ( SRT Header-Back ) - YouTube

SubaruWRXfan's New BRZ Exhaust ( SRT Header-Back ) - YouTube

[glhs377]

i always double wrap it. if we're talking about your moms exhaust...

mike and i would just agree on the right calculations and there would be no difference in numbers. hug it out, whatever.

but if you happen to have some free time, some numbers to start with that are applicable here would be

2.5l 400 hp @6500rpm
12:1AFR
1400F avg EGT(post turbo)
i don't have a DP here but accounting for bends, 16' of 3" pipe after the turbo looks about right.

you start with calculating approximate mass flow out the engine with some thermodynamics, calculate back the pressure differential required from pipe end to start with constant temperature model. when you get ambitions and think you have it sussed, measure actual EGT at the tailpipe from an uncoated or wrapped pipe, get a good linear temperature based volume loss gradient with as many points along the pipe for that as you want. go back to the first part of your spreadsheet, and make as many datapoints as you want between the two to shake a guess at as tho what a wrapped pipe does. you have anywhere from the full temp measured temp to speculate within. but i'm gonna give you a spoiler: WRT constant mass flow out the pipe and lowest pressure post turbo, it's all a worse result with higher temp at the end of the pipe. you can just eyeball that with some PV=NRT and skip all the real numbers. or you know, take my word for it cause i'm a pal and i've a history of sharing data and insight with you, not lying to you or misleading you without correction or humor. i'm not saabtuner trying to puff up my chest or a portfolio here.

anyway, i made the last spreadsheet, you make this one.

[MRF582]

OMG, the new iPhone is so much better than the old one!

First Look: iPhone 5 - YouTube

First Look: iPhone 5 - YouTube