WUR pressure gauge

[dhlthr]

When I was working on the fuel system for my 81 323i and adjusting my WUR I thought it would be nice to have a gauge mounted to check cold and warm pressures. So I checked out http://unwiredtools.com/utcis-cpgauge.asp but did not like it.

While searching web I found a Blox pressure gauge for a Civic
and it gave me an idea.
twincamtech_2102_43364016.jpg

So I drilled the WUR banjo bolt and purchased some compression fittings and tubing, made a mount and this is now what I have.
Drilling banjo bolt.jpg

WUR connection.jpg

Gauge and tubing.jpg

Gauge pressurized.jpg

[g323]

Nice work!

[tlapham]

that is a sweet idea!

[tlapham]

that is a sweet idea!

[pommeree]

A. My vote for "so simple, it's genius" idea of the year.
B. Why is it full of fluid?

[E21Craze]

Glycerine filled, to absorve vibration and pressure spikes.

[Layne]

Cool idea, but when 1 psi makes a difference I think you need something more accurate than a 0-100psi gauge.

[dhlthr]

Cool idea, but when 1 psi makes a difference I think you need something more accurate than a 0-100psi gauge.

Yea I would have gone with a 0-60 gauge from the company that I bought the rest of the goods from but I already had the blox gauge. Also I had already set tested all my fuel pressures with my pressure gauge system. Just thought I'd add this so if the WUR has problems in the future I can tell, just remember everyone this does not tell you system pressure. If anyone is interested in building this I can list all part numbers they need to order.

[g323]

Yea I would have gone with a 0-60 gauge from the company that I bought the rest of the goods from but I already had the blox gauge. Also I had already set tested all my fuel pressures with my pressure gauge system. Just thought I'd add this so if the WUR has problems in the future I can tell, just remember everyone this does not tell you system pressure. If anyone is interested in building this I can list all part numbers they need to order.

I'd be very grateful if you would do this. Prices and links too would be amazing. This is very very interesting.

[Layne]

Could just install a pressure transducer (and another one for system pressure) so you can monitor them from the driver's seat. You could even make it send you a text message if it went low

[dhlthr]

You can purchase all products from the following website:

http://shop.hoseandfittings.com/

Parts list:

Found under Gauge-Liquid filled
1ea. Gauge- 2.5" liquid filled 0-60psi PART# LG250-4R00060 PRICE $12.86

Found under fittings-brass-compression-standard
1ea. Compression x female pipe PART# HF66C-02-02 PRICE $1.62

1ea. Compression x Male pipe PART# HF68X-02-01 PRICE $4.30

2ea. Tube Insert PART# HF63PT-02-16 PRICE $.18ea

Optional Compression Ferrule PART#HF60C-02 PRICE $.13
comes with compression fittings but order extras so that if you make a mistake and overtighten fitting.

Found under Tubing-Polyethylene-Inch
2-3ft. Polyethylene Tubing PART# PE-02-RED PRICE $.035ft
Multiple colors to order from.

Total of $19.50 without s&h

Hope this helps.

Could just install a pressure transducer (and another one for system pressure) so you can monitor them from the driver's seat. You could even make it send you a text message if it went low

Layne,
You no they passed a law against text messaging while driving in Texas.

[jrcook320]

Nice idea, I like it. This lets you measure control pressures without custom (or hacked) fuel lines. The ony thing it doesn't let you do is measure system pressure and rest pressure.

I've thought about adapting a VDO oil pressure sender where my gage is currently mounted, then installing a switch so I can toggle between control pressure and oil pressure on my oil pressure gage. The pressure ranges are close enough that the same sender will work for both. The 0-100 psi gage is ok, but finer resolution would be much better.

Here's what I'm running. Similar setup, but I'm running a hacked fuel line with a T and valve inline.

[g323]

You can purchase all products from the following website:

http://shop.hoseandfittings.com/

Parts list:

Found under Gauge-Liquid filled
1ea. Gauge- 2.5" liquid filled 0-60psi PART# LG250-4R00060 PRICE $12.86

Found under fittings-brass-compression-standard
1ea. Compression x female pipe PART# HF66C-02-02 PRICE $1.62

1ea. Compression x Male pipe PART# HF68X-02-01 PRICE $4.30

2ea. Tube Insert PART# HF63PT-02-16 PRICE $.18ea

Optional Compression Ferrule PART#HF60C-02 PRICE $.13
comes with compression fittings but order extras so that if you make a mistake and overtighten fitting.

Found under Tubing-Polyethylene-Inch
2-3ft. Polyethylene Tubing PART# PE-02-RED PRICE $.035ft
Multiple colors to order from.

Total of $19.50 without s&h

Hope this helps.



Layne,
You no they passed a law against text messaging while driving in Texas.

Thank you for this. With this cart would I also need to drill anything? Or would it all be plug-n-play?

g323

[dhlthr]

You will still need to drill the WUR banjo bolt. Start with a 7/32 drill bit from the inside to center hole. The drill and tap from the top for the 1/16 NPT compression fitting. You will also need to make a bracket to mount the gauge.

[jrcook320]

You can purchase all products from the following website:

http://shop.hoseandfittings.com/

Parts list:

Found under Gauge-Liquid filled
1ea. Gauge- 2.5" liquid filled 0-60psi PART# LG250-4R00060 PRICE $12.86

Found under fittings-brass-compression-standard
1ea. Compression x female pipe PART# HF66C-02-02 PRICE $1.62

1ea. Compression x Male pipe PART# HF68X-02-01 PRICE $4.30

2ea. Tube Insert PART# HF63PT-02-16 PRICE $.18ea

Optional Compression Ferrule PART#HF60C-02 PRICE $.13
comes with compression fittings but order extras so that if you make a mistake and overtighten fitting.

Found under Tubing-Polyethylene-Inch
2-3ft. Polyethylene Tubing PART# PE-02-RED PRICE $.035ft
Multiple colors to order from.

Total of $19.50 without s&h

Hope this helps.



Layne,
You no they passed a law against text messaging while driving in Texas.

Great info man. This is a great, cheap way to measure control pressure, plus it's a nice permenant fixture that you can leave mounted in the bay somewhere. I reference mine occasionally and it's nice to be able to see what control pressure is doing whenever you want.

You could do the same thing with the bango bolt going to the cold start injector to measure system pressure and leak down. Install a 3 way valve between both feed lines and you could switch back and forth to measure control or system pressure as needed. I'll add this to the faq.

Edit:
Just a thought, if you also want to measure system pressure, you'll need a 0-100 psi gage. My system pressure is at 95 psi.

[epmedia]

My system pressure is at 95 psi.

Oh my... I'm at about 78 psi . I still need to send you my spare fuel dist to play with. I'd like a system pressure guage on the dash, cause during accelleration it tends to poop out in 2nd/3rd gear at higher rpms.

[jrcook320]

It's shimmed up to that level. I wouldn't go that high on a stock pump, flow will drop off too low.

A system pressure gage would be a great indicator as to where your bottle neck is in fuel flow. If it drops off at a certain rpm your pump can't supply the flow rate you need at the pressure you're running. I wanted to do this when I was fighting fueling issues and going lean above 5000 rpm to try to determine if it was the pump or the fuel distributor, or AFM simply running out of travel, in which case I'd need to raise system pressure and raise control pressure to get more fuel flow for a given air flow and keep the AFM from running out of travel. yikes.

[dhlthr]

You could do the same thing with the bango bolt going to the cold start injector to measure system pressure and leak down. Install a 3 way valve between both feed lines and you could switch back and forth to measure control or system pressure as needed. I'll add this to the faq.

Edit:
Just a thought, if you also want to measure system pressure, you'll need a 0-100 psi gage. My system pressure is at 95 psi.

I was wondering how I could do the system pressure. Now I'll have to rethink things.

[epmedia]

I have this funky banjo bolt for testing sys pressure at the inlet of the FD. I forget where I got it from, maybe the extra parts from my aftermarket fuel pump. Obviousely it's just for testing, but a good hardline and proper fittings for a guage on the dash would be sweet for testing.

[jrcook320]

To measure system pressure you'll either need to reference a port off the FD (the line feeding the cold start injector is best), or you'd have to have a shut-off valve to block flow to the WUR with your gage in front of the valve (see my pic).

[bimmere21lover]

add this thread to the help forum!

[epmedia]

To measure system pressure you'll either need to reference a port off the FD (the line feeding the cold start injector is best), or you'd have to have a shut-off valve to block flow to the WUR with your gage in front of the valve (see my pic).

That definately sounds more feasable. I'm guessing that I was testing pump pressure, yet the actual sys pressure is a few psi lower than my 78psi at the FD inlet (set with the shims ofcourse). I made a few banjo bolts (went through a few drill bits), maybe I can use some of my spare plastik/hardlines and a long custom banjo bolt on the CSV line. Hmm... that may be the ticket, thanks for the insight Josh .

[jrcook320]

Robert,
I think what you have will measure system pressure as well, as long as it's connected to the fuel distributor and fuel is flow through the regulator and back to the tank.

[BoomerDJ]

i would recommend this to anyone who cares about how their CIS is running. it was one of the first things i did when i started messing with things. its important to know system and control pressures

[bimmerfanE21]

http://shop.hoseandfittings.com/ no longer has the part