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Old 10-15-2007, 02:54 PM   #1
pignoseSTI
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Default APS inlet STU legal?

Hello all I was wondering if the APS turbo inlet pipe was legal for STU? I know you can change everything up to the compressor inlet, however i'm not sure if the modifications needed to install the pipe (moving the FPR, cutting this/splicing that, etc.) would render this pipe illegal. Thanks!
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Old 11-17-2007, 11:45 PM   #2
pinkertonpunk
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Anyone actually know the answer to this yet?
-Colin
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Old 11-18-2007, 12:21 AM   #3
ButtDyno
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I can't remember the details, but I know some of the inlets hook up to all five of the factory spots, and some of them only hook up to four. IIRC the Samco is legal, but I forget the rest.
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Old 11-18-2007, 11:37 AM   #4
PhilC
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The APS is definitely not ST* legal because you have to move things you aren't allowed to touch. The Samco and GPMoto inlets are legal.
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Old 11-18-2007, 09:10 PM   #5
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Screw that. ST rules are such BS.

The emissions system still works as originally intended. Anyone who would protest you over that must be driving a BMW or a RX8.
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Old 11-18-2007, 09:29 PM   #6
kursplat
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Quote:
Originally Posted by WJM View Post
Anyone who would protest you over that must be driving a BMW or a RX8.
or playing by the rules...
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Old 11-19-2007, 12:21 PM   #7
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Thats like the whole ECU/P0420 thing.

Its illegal, but 90% of ST players do it anyhow.
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Old 11-20-2007, 09:14 AM   #8
PhilC
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Quote:
Originally Posted by WJM View Post
Thats like the whole ECU/P0420 thing.

Its illegal, but 90% of ST players do it anyhow.
It's nothing like that at all. The whole ECU/O2 sensor thing wasn't illegal until the clarifichange. Those who compete at the National level in STX at least all had legal cars up until that change and all had illegal cars after it.

The APS inlet is clearly illegal and always has been because of the other modifications required to fit it. In this situation it's not a big deal since the APS isn't going to work as well as the legal options that you have and it costs more to boot.
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Old 11-20-2007, 09:39 AM   #9
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Since I wont have a WRX anymore, it really doesnt matter I could care less if I were in STX and someone were running an APS inlet, I know its not going to give a winning margin in power. N/A cars are much easier to make competitive and remain legal.
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Old 11-21-2007, 09:17 AM   #10
stil2stock
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anyone know if the gimmick motorsports ones are legal?
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Old 11-21-2007, 09:22 AM   #11
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Looks like minimal modification needed.

Altho you are still deleting the 'blow by connector' and you've had to fool the ECU by thinking its still there.

I'd say illegal on that part for all 2004+ WRX and STi.

Would be 100% legal for 02~03 WRX tho.
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Old 02-15-2008, 05:26 AM   #12
-OneWay-
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I found this thread while searching for more information about the APS Inlet in STU class.

Is the issue having to move the fuel pressure regulator out of the way to fit the inlet in place then relocating it?
http://www.airpowersystems.com/wrx/intake/install.htm

You may be able to make a bracket to hold it in the stock location if that is the issue but, I am not seeing where in the Rules prohibits the use of a turbo inlet because of needing to relocate the FPR.

14.10c
" The air intake system up to, but not including, the engine inlet
may be modified or replaced. The engine inlet is the throttle body,
carburetor, compressor inlet, or intake manifold, whichever
comes first. The existing structure of the car may not be modified
for the passage of ducting from the air cleaner to the engine inlet.
Holes may be drilled for mounting. Emissions or engine management
components in the air intake system, such as a PCV
valve, or mass airflow sensor, may not be removed, modified, or
replaced, and must retain their original function along the flow
path."


That sounds to me like as long as I am not modifiying the body structure of the car or modifying emissions or EM components and everything retains it's original function along the flow path, it's allowed.

for the FPR itself

14.10f.3
"Fuel pressure regulators may be replaced in lieu of electronic
alterations to the fuel system. It is not permitted to electronically
modify the fuel system AND replace a fuel pressure
regulator."

Anyone able to explain why the APS Inlet IS or IS NOT allowed and maybe shed some light on this?
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Old 02-15-2008, 08:02 AM   #13
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Quote:
Fuel pressure regulators may be replaced in lieu of electronic alterations to the fuel system. It is not permitted to electronically modify the fuel system AND replace a fuel pressure regulator
That might have something to do with it. If you're running a modified ECU, I read that as you've electronically modified the fuel 'system'. Since the rules say you can't do both... (that and the rules don't say you can relocate the FPR, but only 'replace').

--kC
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Old 02-15-2008, 08:56 AM   #14
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Quote:
Originally Posted by PhilC View Post
The APS inlet is clearly illegal and always has been because of the other modifications required to fit it. In this situation it's not a big deal since the APS isn't going to work as well as the legal options that you have and it costs more to boot.
What options work better? Why are they better options?

Yes, these probably are stupid questions, but I don't know the answers and would like to know.
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Old 02-15-2008, 09:06 AM   #15
68Cadillac
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Quote:
Originally Posted by stil2stock View Post
anyone know if the gimmick motorsports ones are legal?
Of pictures I've seen of the Gimmick Motorsports Inlet, it appears to be legal for STX/STU. Specifically for my 2004 WRX. It fits with minimal modification. It doesn't require modification of the turbo (big no no), and all OEM hoses that fit up to the factory inlet have a place to attach without being blocked internally or plugged with an 10mm screw.
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