Interesting. Thank you 76. In this case, measured flow is what makes it past regulator.

Am looking at Porsche Technical Specifications booklet. Page you show is not in there. Is that the large format service manual you have? Is there a volume indicated for the 30 second flow?
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Yes, this is from the Porsche Work Shop Manual. This page (20-2) covers the setup for the test. Page 24-3 shows the required specifications.http://forums.pelicanparts.com/uploa...1721597008.jpg

Do you not have a copy of the WSM? what is your email address?

Karl: you can also get all the info from Porsche specs booklet..
link in your message

Ivan

Thank you 76. Do not have that. Only have the small spec booklet. PM'd you my email.


Just saw your PM. Thanks Ivan.
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What this test is measuring here is the pump max flow, and it appears that the pump is good. No regulator is involved, since engine is not running. Pressure regulator and damper work only with vacuum produced by running engine.
Also, injectors are not involved in this test. Again, because engine is not running, injectors are bypassed and not actuated. They are closed and fuel running inside the rails is skipping the injectors.

I can send you a copy of the spec book pdf if you want. I have it OCRed, which allows for text searches. PM me your email if you want it.

Yes!


You mean just cleaned. They can't be "refurb", a misconception by many.

This is not entirely correct. the test is actually testing the fuel flow at engine off rail pressure which is ~36 psi. the fuel flow created in this scenario is the amount of fuel the pump can push at that rated pressure. This specification is drastically different than than asking for fuel flow at 0psi.

For instance if you have a fuel pump for a carded engine (~5psi) and you test it as described earlier in this post with the fuel rail open you may get a result around 2 g/m, however if you use this same pump and test it on the outlet side of the regulator which requires 36psi to open, you will have 0 fuel flow since the 5 psi generated by the carburetor pump is insufficient to force the fuel through the regulator.

the idea of this test is to test the minimum flow produced by the pump at the maximum fuel pressure (no vacuum at the regulator).

This statement is wrong. the vacuum supplied by the engine to the regulator specifically lowers the fuel pressure. The highest fuel pressure is when there is no vacuum supplied to the regulator Either engine off, vacuum source disconnected or effectively at WOT.

Yes, sorry for the misconception and wrong information. I overlooked the test setup and thought the fuel flow was measured right at the feed line.
Thanks!

http://forums.pelicanparts.com/uploa...1721687081.JPG

...Sensor gets very hot very quick.

http://forums.pelicanparts.com/uploa...1721687081.JPG

First bench of 4.9 wideband. Put a lit match at tip of sensor and data dropped. Still needs much attention but given things are ON and data is moving in the right direction... is one step closer to sorting this MPG puzzle out.

Power supply here = Arduino 5v / connected to laptop. Lambda shield 12v / connected to car's battery.
Display = 0.96" OLED. Plan is to mount this where Fasten Seatbelt plaque currently is. (TY Joe.) Bezel designs in Onshape then 3D prints.
Data = Lambda on top line. AFR on bottom line. (Screen is focused. iPhone pic blurred it.)
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First in-exhaust test of 4.9 - engine at standing idle / 800 rpm

Plugs: W6DPO - cleaned since prior photo
Injectors: Lucas low impedance 24lb. from FiveO
Mixture screw: 3 ¾ turns out now - was just recently adjusted from being 2 ¼ turns out.
Wideband: ArduinoUNO w/Bylund Shield & sketch + u8g2lib.h + SPI.h —- no mods yet
Sensor: Bosch Lambda 4.9
Power: Arduino via laptop. Shield via car battery

OLED Display = AFR top line / Lambda bottom
Data = 1-2-3 side (SSIs)


Only the Bosch sensor is installed here. All else is sitting on the ground next to the car. Is a progressive bench test to see what numbers are displayed, how the display is working, see if any glitches exist to be sorted out. If there are glitches, what scale are they? What I’m after here is to decide if the system is worth duplicating for 4-5-6 side of engine. Or, does it go in the bin? If it works well and I can sort problems out, I’ll pull all the cables and do all the in-car wiring once.

(Why bother? All this is for the purpose of displaying data on a 0.96” display. ZADA TECH offers a miniature display system using 4.9 but one has to choose between seeing Lambda or AFR data. The USA rep for ZADA is a Porsche guy, Joe, aka “Joesmallwood” on Pelican. Excellent to deal with IMHO. Would certainly be simpler to go the ZADA route. I fancy torturing myself and so the design/build route.)


Start engine… then display is shot at noted minutes from engine start. While these are static images of the display, in real time the numbers are in constant motion. I did not stay by the display to study the range as the setup was too near the exhaust. Only got near when the timer went off to shoot the display.

http://forums.pelicanparts.com/uploa...1721840091.JPG
2 min.

http://forums.pelicanparts.com/uploa...1721840091.JPG
5 min.

http://forums.pelicanparts.com/uploa...1721840091.JPG
10 min.

http://forums.pelicanparts.com/uploa...1721840641.JPG
15 min.

http://forums.pelicanparts.com/uploa...1721840554.jpg
Temp at 15 min.


Not saying AFR/Lambda figures are correct here. Rather, they are what they are for the time being, notably at a standing idle only.

Plan now is to swap out installed plugs for Iridiums, and installed Lucas injectors for original Bosch injectors---provided Bosch injectors test & clean well by Mr. Injector. Then repeat this interval test with no adjustment made to mixture or idle screw, or anything else other than as noted. When replacing plugs, will do compression test to rule out plugs---as seen in last photo---suffering from any excess oil in cylinders. Will be a few days before I hear on the Bosch injector status from Mr. Bill in Idaho. Iridiunms arrived all gapped to 0.8mm.

Going through this testing, replacements, testing, then adjusting whatever is to be adjusted according to the numbers seen be the numbers right or wrong... THEN checking the city mpg... those mpg results will be revealing.

As I finish these notes, realize it would be possible to test AFR/Lambda with the engine under load provided a 4.9 extension cable long enough to reach from the wheel well into the cabin. Simple enough to Blue Tape cables to car's exterior. Would be interesting to see "loaded" figures with current plugs & injectors... Other fish to fry so will pass on this.
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Update...

5 of the 6 Bosch 0280 150 158 injectors I sent to Mr. Bill tested good. 1 failed. Found another and sent that to Mr. Bill to see if that works.

Arduino based wideband system is in progress. Diagram completed. Waiting on various electronic parts to arrive.
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http://forums.pelicanparts.com/uploa...1723566054.jpg

http://forums.pelicanparts.com/uploa...1723566054.jpg

Wideband controller for both exhaust sides is done. 4-5-6 side in SSI needs a hole put in and bung installed. Wanted to position 4-5-6 sensor exactly the same as on the 1-2-3 side but is questionable whether it's possible to drill a hole on the top side of the exhaust tube with the SSI installed on the engine. Nothing appealing about removing that exhaust section. Need a low profile 90 degree drill bit fixture. Also on menu is finding a stainless welder willing to get in under the car. And all the cabling needs to be run.


http://forums.pelicanparts.com/uploa...1723566054.jpg

My original Bosch 0280 150 158 injectors serviced by Bill. As always, Bill is a pleasure to deal with.
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I've been flogging a dead horse for the past weeks. Doing so, I've found Bylund Automotive's shield and other products of his being useless. The Bylund forum is an empty shell. All Bylund YouTube vid's have comments shut down---a sure tell that I missed because I wanted this gear to work. And all of what was invested was because I wanted wideband data displayed in a tiny 0.96" OLED that fit into the Fasten Seatbelt plaque space. I'd flog myself but "win some, loose some" comes to mind and that is more appealing space.

Have been holding off on swapping plugs and injectors wanting to see what the O2 status was under various engine loads with the existing W6DPO plugs and Lucas injectors. A baselining of sorts. I figured to be past that stage by now but the wideband build... I don't give up easily, sometimes to a fault.

What the course is now depends on a response from Zada. I will finish this project.

Am continuing this project in new thread. Dual Innovate wideband is now installed...

https://forums.pelicanparts.com/porsche-911-technical-forum/1170007-wideband-data-3-2-getting-10-mpg-city-what-do-you-think.html
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