A/F gauge?, Is it worth it? |
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A/F gauge?, Is it worth it? |
BiG bOgGs |
Apr 11 2010, 08:22 PM
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#1
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The Bogus One Group: Members Posts: 452 Joined: 25-September 04 From: Ft. Myers, FL 33967 Member No.: 2,829 Region Association: South East States |
I am looking to add an Air/fuel gauge to my 76 2.0L D-Jet. Is there a VDO meter that would match our present gauges, and is it even worth having as a gauge? I have done a few searches and come up with some info, but I don't really find anyone who has one in their system.
I would like to be able to monitor the A/F ratio to tell when I am running too rich or too lean over all, not really for precision diagnostics. |
76-914 |
Apr 11 2010, 09:35 PM
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#2
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,495 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
You could add a 4 channel EGT gage and sensors. Leaner is hotter. But why? You'll just drive yourself nuts watching all of them be different. We certainly don't have any controll over this once we set the tune. Except for a dash mounted variable resistor to CHT sender. Might be neat to watch the warm up process via EGT, though. Or the old fashioned way. Check your gas milage and plugs condidtion.
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jasons |
Apr 11 2010, 10:35 PM
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#3
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Jackstand Extraordinaire Group: Members Posts: 2,002 Joined: 19-August 04 From: Scottsdale, AZ Member No.: 2,573 Region Association: None |
Don't waste your money on a narrow band unit. I have one, and it is useless. You would be better off getting a good clock. On the other hand, a wide band might be interesting.
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Mark Henry |
Apr 12 2010, 04:42 AM
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#4
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
This is the cheapest WB system if you are the DYI type and can solder your own.
http://www.14point7.com/Widebands/SLC_DIY/SLC_DIY.htm This one for $300 is the same size as a VDO http://sdsefi.com/wmsmm.htm (IMG:http://www.914world.com/bbs2/uploads_offsite/sdsefi.com-26-1271069633.1.jpg) Built systems are about $300 and up |
turboman808 |
Apr 12 2010, 09:33 AM
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#5
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Advanced Member Group: Members Posts: 2,718 Joined: 31-January 06 From: North Jersey Member No.: 5,505 Region Association: North East States |
I was thinking about getting this one. http://www.zeitronix.com/
But I spoke with Chris Foley and I think what I would like to see done is put in a complete aem ecu with wide band and all the little bells and whistles. The Haltech I have now is very outdated and even with the jetronix system installed I don't think it will do as good of job as a complete replacement with the aem system. |
ConeDodger |
Apr 12 2010, 09:39 AM
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#6
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Apex killer! Group: Members Posts: 23,580 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California |
This is the cheapest WB system if you are the DYI type and can solder your own. http://www.14point7.com/Widebands/SLC_DIY/SLC_DIY.htm This one for $300 is the same size as a VDO http://sdsefi.com/wmsmm.htm (IMG:http://www.914world.com/bbs2/uploads_offsite/sdsefi.com-26-1271069633.1.jpg) Built systems are about $300 and up This is the one Jake Raby has wired into his two dyno rooms. He loves it. I have an LC-1 that I have never taken out of the box. I should probably put it up for sale huh? Something I recently noticed while using McMark's LM-1 to tune Jim Dupree's D-Jet blueprinted 2.0 though... D-Jet seems to regulate A/F under load much better than sitting still and revving. I about went batty trying to figure what was wrong while revving the engine in the driveway but once I took it out on the street, I realized that the motor was pretty much on the nose as it regards 30+ year old EFI systems. |
hcdmueller |
Apr 12 2010, 09:52 AM
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#7
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????????????? Group: Members Posts: 542 Joined: 4-February 06 From: UK Member No.: 5,527 Region Association: England |
I have a PLX and an LC-1. The PLX is much easier to install on a 914. It also warms up faster, needs no calibration, and responds quicker than the LC-1. The LC-1 works great but if you have a choice I would go with the PLX just for the easier install alone. Saying that, if you are running a stock engine on D-Jet I wouldn't worry about it.
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sean_v8_914 |
Apr 12 2010, 09:54 AM
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#8
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Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
do you already have CHT?
oil temp? these should be higher up on teh priority list |
realred914 |
Apr 12 2010, 10:39 AM
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#9
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Senior Member Group: Retired Members Posts: 1,086 Joined: 1-April 10 From: california Member No.: 11,541 Region Association: None |
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jd74914 |
Apr 12 2010, 11:55 AM
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#10
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Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
I was thinking about getting this one. http://www.zeitronix.com/ But I spoke with Chris Foley and I think what I would like to see done is put in a complete aem ecu with wide band and all the little bells and whistles. The Haltech I have now is very outdated and even with the jetronix system installed I don't think it will do as good of job as a complete replacement with the aem system. cough...Adaptronic e1280...cough On a related note, I have used a few Innovative LC/LM-1's and liked them. I have never tuned a carbed or stock FI motor with them (only aftermarket FI), but they are most definately invaluable when tuning. |
turboman808 |
Apr 12 2010, 12:12 PM
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#11
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Advanced Member Group: Members Posts: 2,718 Joined: 31-January 06 From: North Jersey Member No.: 5,505 Region Association: North East States |
I was thinking about getting this one. http://www.zeitronix.com/ But I spoke with Chris Foley and I think what I would like to see done is put in a complete aem ecu with wide band and all the little bells and whistles. The Haltech I have now is very outdated and even with the jetronix system installed I don't think it will do as good of job as a complete replacement with the aem system. cough...Adaptronic e1280...cough On a related note, I have used a few Innovative LC/LM-1's and liked them. I have never tuned a carbed or stock FI motor with them (only aftermarket FI), but they are most definately invaluable when tuning. Not a bad system. Adds real traction control. AEM traction control is somewhat lacking. Back to your regular topic. (IMG:style_emoticons/default/biggrin.gif) |
pbanders |
Apr 12 2010, 03:41 PM
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#12
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Senior Member Group: Members Posts: 939 Joined: 11-June 03 From: Phoenix, AZ Member No.: 805 |
Something I recently noticed while using McMark's LM-1 to tune Jim Dupree's D-Jet blueprinted 2.0 though... D-Jet seems to regulate A/F under load much better than sitting still and revving. I about went batty trying to figure what was wrong while revving the engine in the driveway but once I took it out on the street, I realized that the motor was pretty much on the nose as it regards 30+ year old EFI systems. That's my same observation, loaded CO is stable, idle stable CO wanders. I have a theory as to why, just need to do the testing to verify it |
rohar |
Apr 12 2010, 03:55 PM
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#13
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Senior Member Group: Members Posts: 924 Joined: 25-October 08 From: spokane Member No.: 9,685 Region Association: None |
This is the cheapest WB system if you are the DYI type and can solder your own. http://www.14point7.com/Widebands/SLC_DIY/SLC_DIY.htm This one for $300 is the same size as a VDO http://sdsefi.com/wmsmm.htm (IMG:http://www.914world.com/bbs2/uploads_offsite/sdsefi.com-26-1271069633.1.jpg) Built systems are about $300 and up Interesting, more the data acquisition than anything. If the software could be ported to linux or CE I'd tie it to a SmartQ7 and throw out my gauge panel. |
ChrisFoley |
Apr 12 2010, 05:23 PM
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#14
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I am Tangerine Racing Group: Members Posts: 7,923 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
I'm using an Auto Meter (LED style) Narrow Band A/F meter in my carbed street car and I like it.
When the engine is tuned well the lights don't change a lot. I have the carbs set up so the meter stays just into the green band most of the time, enters the amber once in a while, and never goes red or to the far end of the green band. When a jet gets clogged the meter shows leaner than normal. When I hit the accelerator it goes further into the green, and at WOT it gets a little more green too. |
McMark |
Apr 12 2010, 06:20 PM
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#15
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
No there isn't much that will match a VDO-look.
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marks914 |
Apr 12 2010, 07:15 PM
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#16
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Senior Member Group: Members Posts: 845 Joined: 9-October 04 From: the motor city Member No.: 2,912 Region Association: None |
We can do up a custom wide or narrow band A/F gauge to match whatever you need. We get the guts from the same company that makes them for everyone
Mark Attached is the core gauge They are back lit though. We just tooled up an orange back lit pointer with a spun metal hub similar to the original VDO stuff Attached image(s) |
McMark |
Apr 12 2010, 07:49 PM
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#17
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
OMG!!!! Mark, I can't wait to see a finished product. I'm absolutely in for one.
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Mark Henry |
Apr 12 2010, 08:17 PM
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#18
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
The only thing is to be effectively looking at a AFR meter, as you drive, you need it up in your line of sight. If it's down on a console it's totally useless. Nothing more than a piece of bling for bragging rights that you have one.
There's a big reason that the WMS unit has an LED readout, ease of reading. I've never permanently installed my meter...because it's been temporarily mounted in at least 20-30 cars by now. |
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