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Old 01-04-2006, 12:44 PM   #1
fasteddie
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Default Fuel test port?

I guess I need a provisision for scrutineers to take fuel samples on a PGT 2002 WRX rally car.
What do you guys do?
Thanks a lot!
Ted Mendham

Sorry if this has been covered. I tried to search.
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Old 01-04-2006, 12:56 PM   #2
turboICE
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I use a dry break connection going from my rail to the FPR. And then have a short hose with the same connection. I connect this hose to the rail side to get the sample.

That is on a 240SX, though you get the idea. On the Subaru boxer you can probably do it on a hose from the filter to the rail. And have the loose hose connect to the filter side.

Keep in mind this idea anticipates pressure in front of the FPR and when you connect the loose hose fuel will come out so have the container to collect it ready.
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Old 01-04-2006, 02:45 PM   #3
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I was told on a FI car we didn't need one (this for clubracing though)

-Tom
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Old 01-04-2006, 02:58 PM   #4
turboICE
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Not sure where that would have come from everyone must have a method for fuel sampling, depending on the car this may or may not require adding something to it:

Quote:
Originally Posted by 2006 GCR
17.4.2. Fuel Sample Acquisition
All cars shall be equipped with an easily accessible sampling valve/port located between the fuel tank and the carburetor(s) or fuel injectors to facilitate acquisition of fuel samples. To avoid fuel spillage, the fuel sampling valve/port shall not consist of removing a fuel line from any fuel system component unless a dry break fitting has been installed. A capped and/or sealed T may be fitted inline, or a capped and/or sealed auxiliary sample port may be fitted to a fuel system component (carburetor, fuel rail, etc.) without using a dry break fitting. Under no circumstances is siphoning of fuel from the fuel tank/ cell acceptable.

If possible, the sampling valve/port should not be located in the engine compartment. Cars equipped with a factory fuel pressure test port (e.g. fuel injected SS, T, IT, SRF, etc.) or competitors having factory fuel pressure test equipment available, are not required to have an additional fuel sampling port. On all other cars, to avoid fuel spillage it is recommended that a valve or dry-break fitting be installed in the fuel line. In all cases competitors shall provide the appropriate tooling necessary to safely obtain the fuel sample. A manned fire extinguisher shall be present whenever fuel samples are being acquired.
Gotta luv that they didn't copy restrict the new GCR so much easier to be a rules nerd now.

Does the STi have a fuel pressure test port? I don't recall one and that would be the only basis for what you were told.

Last edited by turboICE; 01-04-2006 at 03:05 PM.
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Old 01-04-2006, 03:09 PM   #5
turboICE
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Going completely from memory as I don't have a Subaru FSM here, to test fuel pressure I believe the gauge has to be added in line and the fittings are not dry break (depressurization is required). That being the case the "FI exemption" as it were wouldn't be available.

Yeah I know the e.g. makes it sound like FI Touring cars would be excluded wholesale - but it is really contingent on an OEM fuel pressure test port being present.

Last edited by turboICE; 01-04-2006 at 03:16 PM.
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Old 01-04-2006, 03:24 PM   #6
trhoppe
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I see. The logbook guy referred to that line of the book when he told us we didn't need it. I read it real quick and didn't look into it further. Throw this on the long to do list

-Tom
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Old 01-04-2006, 04:08 PM   #7
fasteddie
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Rally America wants to be able to get a fuel sample from under the hood of my WRX.

I will check for a pressure test port.
Thanks,
Ted
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Old 01-04-2006, 05:07 PM   #8
turboICE
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Tom - I can see where from a very quick glance at just the e.g. that someone could make that conclusion quite honestly - but in total I think the rule is sufficiently clear that anyone who relied on that would be on the losing side of a scrutineer discussion. I know you wouldn't push it as an issue anyway - but hey I put money on it being one of the easiest things on your to do list. You have a better honeydew list than most of us anyway. There isn't a single thing on my honeydew list that has to do with the race car.

Ted - don't think there will be a test port there, check your FSM (which you should also have for RA ) and I am going to bet to test fuel pressure it will tell you to use some subaru pressure gauge, depressurize the system, install the gauge between some existing system fittings. I think your best bet would be a dry break quick connect right before or after the underhood fuel filter.

Ed.

PS take it from experience - include no aftermarket fittings in the fuel system that result in the fitting being directly over the exhaust system ...
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Old 01-04-2006, 07:53 PM   #9
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Exclamation

Ted--

The LDR cars have fuel test ports plumbed into low-press pipe out of fuel filter into fuel rail. Easy for scrutineers to see, low-press plumbing less likely to give you a stupid DNF for something rarely used.

most likely scenario for actually NEEDING fuel test port is if you finish Top 3 in class, or put a PGT car high into overall placing.

dunno where John got the actual ports, PM him for the gory details.

Dave G
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Old 01-04-2006, 07:56 PM   #10
trhoppe
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Tom's honeydo list.
a) install fuel port
b) mount race tires
c) finishing installing padding
d) do the dishes

Where is a good place to buy one of these suckers?



-Tom
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Old 01-04-2006, 08:09 PM   #11
turboICE
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Tom you should know this search is your friend... I like google.

Eaton/Aeroquip makes good ones even titled for this purpose.

http://www.hydraulic-supply.com/pdf/performance/60.pdf

Another alternative that isn't a bad idea for you is the in-line fuel pressure adapter.

http://www.hydraulic-supply.com/pdf/performance/55.pdf

You can cap it for normal use and then put in a gauge for those monster tuning sessions - watch the pressure drop at boost greater than 16psi which is why the idc has to go up so much unless they upgraded the pumps from the 04's.

My 240sx has the first ones since I have an FP gauge permanently in car.

Any fluid connecting needs always go to aeroquip first.

And hydralic supply is in or at least covers GA.

Georgia Branch Locations Hours

937 Forest Parkway
Forest Park, GA 30297
Tel: 404-608-0995 Fax: 404-608-1055
Mon-Fri 7am - 5:00pm
Sat 8am - 12noon

6310 Mableton Parkway
Mableton, GA 30126
Tel: 678-398-6673 Fax: 678-398-6817 Mon-Fri 7am - 5:00pm
Sat 8am - 12noon

Regency Center Business Park
6300 Jimmy Carter Blvd. Suite 110
Norcross, GA 30071
Tel: 770-500-1981 Fax: 770-500-1984 Mon-Fri 7:30am - 5:00pm

Ed.

Last edited by turboICE; 01-04-2006 at 08:14 PM.
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Old 01-04-2006, 08:35 PM   #12
roofis
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Quote:
Originally Posted by trhoppe
Where is a good place to buy one of these suckers?
How about www.fuelports.com?

I've seen these recommended by a bunch drivers on here. I think Subiegal may have one in her PGT WRX, but don't quote me on that.
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Old 01-04-2006, 11:01 PM   #13
AlexP
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Quote:
Originally Posted by RB5 Clone
The LDR cars have fuel test ports plumbed into low-press pipe out of fuel filter into fuel rail. Easy for scrutineers to see, low-press plumbing less likely to give you a stupid DNF for something rarely used.
"pipe out of the fuel filter into the fuel rail" is not "low pressure". The only low pressure line in the system is the return line, from the rail/regulator to the tank.

I used the following CPC (colder products company) quick disconnect couplings for my IT car, purchased from McMaster-Carr (mcmaster.com):

5478 K99 1/4" straight thru (for test hose), $4.85
5478 K119 1/4" Shut-Off (dry-break) male, $10.47
5478 K79 1/4Z" Shut-Off (dry-break) female, $17.03

Prices were from 9/03, so they've probably gone up a bit. The dry-break fittings are placed inline on the return hose (anywhere between the fuel rail and the tank). When you want a sample, you push the release button, and fittings break. You take your test hose (which one end is already in a collection container) and plug it into the fuel rail side of the dry break. You then cycle the ignition (don't try starting the car, although it would work) for a second or two to get your fuel sample. When you are done, simply disconnect the test hose, reconnect the return line (just a quick *snap*), and you're ready to go.

[edit] I should also note that depending on your return line size, you may need larger quick disconnects. Mine happened to be 6mm ID, so I went with the 1/4" couplings. Also, it is possible that these (and ALL) drybreak fittings can cause backpressure in the system, so you should always test your fuel pressure before and after installation, just to be sure.
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Old 01-04-2006, 11:09 PM   #14
AlexP
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Quote:
Originally Posted by RB5 Clone
most likely scenario for actually NEEDING fuel test port is if you finish Top 3 in class, or put a PGT car high into overall placing.
3 cars that I wrenched on this year were notified at scrutineering that they NEEDED a sample port prior to competing at their next RA event. Two at STPR, one at Maine. The two at STPR were verbal warnings, the one at Maine received a logbook note, to be remedied for the next rally.
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Old 01-04-2006, 11:33 PM   #15
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save yourself the headache & call fuelports.com. he is very helpful & they are under $20 shipped to you. It goes right in the line from the fuelo filter under the hood. no sweat. Order it with the schrader valve smaple port tool too- you'll need that for the pee tests.

Mine worked great. Lurch & Matthew Johnson both use that kind too.

JC
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Old 01-05-2006, 12:10 AM   #16
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Quote:
Originally Posted by JC_595
save yourself the headache & call fuelports.com. he is very helpful & they are under $20 shipped to you. It goes right in the line from the fuelo filter under the hood. no sweat. Order it with the schrader valve smaple port tool too- you'll need that for the pee tests.

Mine worked great. Lurch & Matthew Johnson both use that kind too.

JC
This is what I have on my rally car too.
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Old 01-05-2006, 08:51 AM   #17
fasteddie
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Thanks a lot Everyone!
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