Audi 4000 Quattro/Coupe GT/VW TDI: V.A.G. Ueber Alles

The Something Awful Forums > Discussion > Automotive Insanity > Audi 4000 Quattro/Coupe GT/VW TDI: V.A.G. Ueber Alles

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CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

I got sick of digging out a serial cable, so I added Bluetooth to my Megasquirt

# ? Apr 13, 2016 04:12

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# ? Apr 28, 2024 16:52

Applebees Appetizer: Jan 23, 2006

CommieGIR posted:

Not enough Audis in that pic :colbert:

Engine bay looks good and good call on the bluetooth. Wish I had a megasquirt

# ? Apr 13, 2016 05:48

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

leica posted:

Not enough Audis in that pic

Engine bay looks good and good call on the bluetooth. Wish I had a megasquirt

I'd like to clean up the bay more, but for now it'll do.

You can still get an MS1 kit for reasonable prices, which can easily be upgraded to an MS2. Unfortunately, I can't do the MS2 upgrade because it locks you out of coil triggering.

# ? Apr 13, 2016 11:13

Wrar: Sep 9, 2002; Soiled Meat

Timmy Cruise posted:

Why you gotta make me feel old??

The B4 chassis also had the engine entirely forward of the front axle. Not too many easy choices for packaging.

Glad you got it running. I've always had a soft spot for 80s VAG.

You could always do it the BMW/Nissan way with the shaft through the oil pan.

# ? Apr 13, 2016 15:02

scuz: Aug 29, 2003; You can't be angry ALL the time!; Fun Shoe

CommieGIR posted:

I got sick of digging out a serial cable, so I added Bluetooth to my Megasquirt

That is a drat cool setup.

How's the MegaSquirt working out? There exists the need for a new ECU(?) in my future for my mk4 Golf and I'm hoping the MS will do the job well enough.

# ? Apr 13, 2016 16:51

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

scuz posted:

That is a drat cool setup.

How's the MegaSquirt working out? There exists the need for a new ECU(?) in my future for my mk4 Golf and I'm hoping the MS will do the job well enough.

Its working excellent, there's some things I have to fix:

Current list:
1. I need a GM Intake Air Temp Sensor. The VW/Audi stock one reads wrong due to the resistance values GM uses versus VW uses (and since Megasquirt was built around GM builds, I either have to change the temp map on the chip or just switch to a GM)
2. Idle Valve isn't triggering. This may be an issue with the way Megasquirt determines when to open the Idle Valve (based on temperature), but once it warms up it no longer needs the idle valve.

I have to stick with the MS1 if I want to continue to trigger fuel only from the Coil -, because if I switch to the MS2 (a simple chip replacement) it has to be triggered from the Hall sensor. I don't want to go that route right now, although I built my wiring harness assuming I would go that way eventually.

# ? Apr 13, 2016 18:10

Suburban Dad: Jan 10, 2007; Well what's attached to a leash that it made itself?
The punchline is the way that you've been fuckin' yourself

CommieGIR posted:

Its working excellent, there's some things I have to fix:

Current list:
1. I need a GM Intake Air Temp Sensor. The VW/Audi stock one reads wrong due to the resistance values GM uses versus VW uses (and since Megasquirt was built around GM builds, I either have to change the temp map on the chip or just switch to a GM)
2. Idle Valve isn't triggering. This may be an issue with the way Megasquirt determines when to open the Idle Valve (based on temperature), but once it warms up it no longer needs the idle valve.

I have to stick with the MS1 if I want to continue to trigger fuel only from the Coil -, because if I switch to the MS2 (a simple chip replacement) it has to be triggered from the Hall sensor. I don't want to go that route right now, although I built my wiring harness assuming I would go that way eventually.

I thought you were able to put in the scaling for your specific sensor if you knew the resistance vs. temp values, but it's been awhile.

# ? Apr 13, 2016 20:12

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Larrymer posted:

I thought you were able to put in the scaling for your specific sensor if you knew the resistance vs. temp values, but it's been awhile.

Yes, you can but you basically have to flash a file with the new resistance values.

# ? Apr 13, 2016 20:17

scuz: Aug 29, 2003; You can't be angry ALL the time!; Fun Shoe

CommieGIR posted:

Yes, you can but you basically have to flash a file with the new resistance values.

GM parts are, by and large, cheaper here in the states anyway. Thanks for the input, can't wait to tackle that project, mostly cuz it means my Golf will have a turbo on it.

# ? Apr 13, 2016 22:26

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

drat you Megasquirt, I gave you the right temperature values, and you still got it wrong!

# ? Apr 14, 2016 03:52

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Upgraded Megasquirt to Megasquirt Extra. All sorts of cool features I'll probably never use.

Gotta get Idle Valve working...

# ? Apr 17, 2016 04:34

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Exhaust welded up. Recommend me a turbo rebuilder.

# ? Apr 22, 2016 15:10

sharkytm: Oct 9, 2003; Ba

By

Sharkytm doot doo do doot do doo; Fallen Rib

CommieGIR posted:

Exhaust welded up. Recommend me a turbo rebuilder.

NM, apparently Blaast has gone to poo poo. Too bad.

sharkytm fucked around with this message at 18:22 on Apr 22, 2016

# ? Apr 22, 2016 18:18

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Basically, I got the downpipe all welded up, and now its smoking bad. It has to be oil smoke because I don't think its running as rich as it would need to be to smoke like that.

And sure enough, pulled the turbo, pooled out on the exhaust side.

I've also run into ignition issues, and since I just installed Megasquirt Extra firmware on my MS1, I'm probably going to switch to handling the ignition through it as well.

# ? Apr 22, 2016 18:35

scuz: Aug 29, 2003; You can't be angry ALL the time!; Fun Shoe

Would you want to do it yourself?

# ? Apr 22, 2016 19:00

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

scuz posted:

Would you want to do it yourself?

I might have to at this rate.

# ? Apr 22, 2016 19:01

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Bonus to adding all the wiring, even the unneccessary stuff: Don't have to go back later and re-add wires for new features.

Like ignition control

# ? Apr 22, 2016 23:10

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Success! Megasquirt now controls the ignition and ignition timing.

Downside: I have a leaky turbo oil return line now...

# ? Apr 23, 2016 19:48

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Okay, still have acceleration issues, starts fine then starts bucking, struggling under load. I can't tell if its ignition or fuel enrichment issues :smith:

code:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<tableData xmlns="http://www.usEasyDocs.com/theory/spktable.htm/:table">
<bibliography author="Lance Gardiner" company="BGSoflex, copyright 2010, All Rights Reserved." writeDate="Sat Apr 23 2016 20:02:56 GMT-0400 (Eastern Daylight Time)"></bibliography>
<versionInfo fileFormat="1.0"/>
<table cols="12" rows="12">
<xAxis cols="12" name="rpm">
         800
         950
         1400
         1800
         2200
         2700
         3100
         3500
         3900
         4400
         4800
         7000
      </xAxis>
<yAxis name="kpaix" rows="12">
         25.0
         43.0
         61.0
         79.0
         98.0
         116.0
         134.0
         152.0
         170.0
         188.0
         207.0
         225.0
      </yAxis>
<zValues cols="12" rows="12">
         13.0 10.0 17.0 21.3 25.5 30.8 34.0 34.0 34.0 34.0 34.0 34.0
         13.0 10.0 16.3 20.3 24.4 29.5 32.5 32.5 32.5 32.5 32.5 32.5
         13.0 10.0 15.5 19.4 23.3 28.1 31.0 31.0 31.0 31.0 31.0 31.0
         13.0 10.0 14.8 18.5 22.2 26.8 29.5 29.5 29.5 29.5 29.5 29.5
         5.0 10.0 14.0 17.5 21.0 25.3 28.0 28.0 28.0 28.0 28.0 28.0
         5.0 10.0 13.2 16.5 19.8 24.0 26.4 26.4 26.4 26.4 26.4 26.4
         5.0 10.0 12.5 15.6 18.7 22.6 24.9 24.9 24.9 24.9 24.9 24.9
         5.0 10.0 11.7 14.7 17.6 21.3 23.4 23.4 23.4 23.4 23.4 23.4
         5.0 10.0 11.0 13.7 16.5 19.9 21.9 21.9 21.9 21.9 21.9 21.9
         5.0 10.0 10.2 12.8 15.3 18.5 20.4 20.4 20.4 20.4 20.4 20.4
         5.0 10.0 9.4 11.8 14.2 17.1 18.9 18.9 18.9 18.9 18.9 18.9
         5.0 10.0 8.7 10.9 13.0 15.7 17.4 17.4 17.4 17.4 17.4 17.4
		</zValues>
</table>
</tableData>

This helped immensely. I regenerated the spark map from Megasquirt's online generator and now it accelerates with a LOT less bucking, still not smooth but functions now. Need to get a good log.

code:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<tableData xmlns="http://www.usEasyDocs.com/theory/afrtable.htm/:table">
<bibliography author="Lance Gardiner" company="BGSoflex, copyright 2010, All Rights Reserved." writeDate="Sat Apr 23 2016 21:02:05 GMT-0400 (Eastern Daylight Time)"></bibliography>
<versionInfo fileFormat="1.0"/>
<table cols="12" rows="12">
<xAxis cols="12" name="rpm">
         800
         1300
         1900
         2400
         3000
         3600
         4200
         4700
         5300
         5900
         6400
         7000
      </xAxis>
<yAxis name="kpaix" rows="12">
         25.0
         44.0
         62.0
         80.0
         98.0
         116.0
         134.0
         152.0
         170.0
         188.0
         208.0
         225.0
      </yAxis>
<zValues cols="12" rows="12">
         12.8 12.8 14.1 14.0 13.9 13.8 13.8 13.7 13.6 13.5 13.5 13.5
         12.8 12.8 13.7 13.7 13.6 13.5 13.4 13.3 13.2 13.1 13.1 13.1
         12.8 12.8 13.4 13.3 13.2 13.1 13.0 12.9 12.9 12.8 12.8 12.8
         12.8 12.8 13.0 12.9 12.8 12.7 12.7 12.6 12.5 12.4 12.4 12.4
         12.8 12.8 12.6 12.6 12.5 12.4 12.3 12.2 12.1 12.0 12.0 12.0
         12.8 12.8 12.3 12.2 12.1 12.0 11.9 11.9 11.8 11.7 11.7 11.7
         12.8 12.8 11.9 11.9 11.8 11.7 11.6 11.5 11.4 11.3 11.3 11.3
         12.8 12.8 11.6 11.5 11.4 11.3 11.2 11.1 11.1 11.0 11.0 11.0
         12.8 12.8 11.2 11.1 11.0 10.9 10.9 10.8 10.7 10.6 10.6 10.6
         12.8 12.8 10.8 10.8 10.7 10.6 10.5 10.4 10.3 10.2 10.2 10.2
         12.8 12.8 10.4 10.4 10.3 10.2 10.1 10.0 9.9 9.8 9.8 9.8
         12.8 12.8 10.1 10.0 9.9 9.8 9.8 9.7 9.6 9.5 9.5 9.5
</zValues>
</table>
</tableData>

Going to test this generate VE table tomorrow.

CommieGIR fucked around with this message at 02:03 on Apr 24, 2016

# ? Apr 24, 2016 00:57

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Adjusted trigger angle to 72 to test a theory.

Holy gently caress it DRIVES! with some wicked boost. Idle is having issues, but it drives!

# ? Apr 24, 2016 18:12

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Current Spark Advance and Air/Fuel table.

# ? Apr 24, 2016 21:47

Dagen H: Mar 19, 2009; Hogertrafikomlaggningen

I understand none of this. :downs:

I'm reading it anyway.

# ? Apr 24, 2016 22:43

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Dagen H posted:

I understand none of this. I'm reading it anyway.

I understand about as much as you do :downs:

And that's kinda the problem...

# ? Apr 25, 2016 18:56

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Probably going to have to go with a Wideband O2 sensor to get this tune just right, bonus is right now it doesn't appear that I'm risking leaning the engine out if I'm reading the O2 readout right.

# ? Apr 28, 2016 04:30

Suburban Dad: Jan 10, 2007; Well what's attached to a leash that it made itself?
The punchline is the way that you've been fuckin' yourself

Wow, you got it running decently enough without one? That will make it easy mode when you can do the live closed loop VE tuning in Tunerstudio. Just hit a load for a few seconds and bam, VE is good to go based on your AFR set point and timing. Totally worth the money and I don't know how you expected to tune it correctly without it. It's like flying blind.

# ? Apr 28, 2016 13:39

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Larrymer posted:

Wow, you got it running decently enough without one? That will make it easy mode when you can do the live closed loop VE tuning in Tunerstudio. Just hit a load for a few seconds and bam, VE is good to go based on your AFR set point and timing. Totally worth the money and I don't know how you expected to tune it correctly without it. It's like flying blind.

If I'm reading this right, I'm actually running slightly rich, but close enough to the cutoff for the narrowband that between shifts it registers slightly 'lean', which should be correct as it means the engine is going into decel mode and cutting back on fuel.

Running on average ~.700 - ~890 mV, which seems to show rich.

# ? Apr 28, 2016 16:39

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Got the Megasquirt tune stable, working on cleaning up the engine bay and environmental sealing.

Working on sheet metal for a heatshield and intercooler.

# ? May 13, 2016 01:29

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Engine works great. Last night, I had an issue due to the gas gauge being broke, ran out of fuel and panicked thinking I had leaned out the engine. I've been running it slightly rich with premium fuel for testing purposes.

List of things it needs:
1. Better oil cooler or increased cooling via fans
2. Increase engine cooling
3. Boost controller needed. Megasquirt will handle it, just have to wire up the valve and figure out boost rate.
4. Struts are crud. It lifts pretty hard under initial boost.

CommieGIR fucked around with this message at 00:32 on May 15, 2016

# ? May 15, 2016 00:25

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

https://youtu.be/fCs0dH_zrBE

Driving video, now with wind noise and me shuffling trying to keep papers from flying out.

# ? May 16, 2016 22:37

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

https://www.youtube.com/watch?v=fCs0dH_zrBE&feature=youtu.be&t=1029

Best part of the video. Boost lift

# ? May 17, 2016 03:19

DesperateDan: Dec 10, 2005; Where's my cow?

Is that my cow?

No it isn't, but it still tramples my bloody lavender.

CommieGIR posted:

https://www.youtube.com/watch?v=fCs0dH_zrBE&feature=youtu.be&t=1029

Best part of the video. Boost lift

Sounds great, what you got in there, a whole ream of A4?

Just caught up on your thread, so great to see how far things have come

# ? May 17, 2016 09:25

TWSS: Jun 19, 2008

This is making me want one very badly. BRB checking kijiji for 30 year old audis.

# ? May 17, 2016 14:28

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

DesperateDan posted:

Sounds great, what you got in there, a whole ream of A4?

Just caught up on your thread, so great to see how far things have come

Hilariously, I was picking up paperwork for my deployment.

So yes.

TWSS posted:

This is making me want one very badly. BRB checking kijiji for 30 year old audis.

Well, you have to find the 3B Turbo motor as well and build your own Megasquirt harness. Bonus if you can just find the stock wiring harness.

# ? May 17, 2016 14:42

No. 6: Jun 30, 2002

My old man still has a 91 20v turbo 200 rotting in the garage. Wonder if I can use that as a donor...

# ? May 17, 2016 16:18

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

No. 6 posted:

My old man still has a 91 20v turbo 200 rotting in the garage. Wonder if I can use that as a donor...

Its what I used. You'll have to re-used the flywheel from the 200 to make it work, the 4000 uses a longer flywheel and it is not compatible with the 3B in the 4k.

Otherwise its a straight bolt in.

# ? May 17, 2016 17:57

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

So now that the Turbo Quattro is driveable again, I'm discovering some suspension parts are feeling its age.

Biggest one being the driver's side control arm knuckle, which was popping. So I went to remove it....

Who the gently caress welds the nut on?

So I used an angle grinder to chop off the control arm to remove the strut and swap it with a spare.

Removed, new knuckle versus the one I cut.

Shock cartridge was toast on the spare, so I swapped in a new cartridge:

And then put the new strut into the car!

# ? May 17, 2016 22:08

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Put front springs on the rear struts if my 4kQ.

Plus: Nice lift.
Downside: Rides like poo poo. Gonna out the rear springs back on.

# ? May 23, 2016 14:00

Alabamarama: Aug 22, 2013

Just in case you were thinking of buying one...

I recently had my fancy Tommis billet adjustable cam gear throw a bolt, which then lodged between the crank timing gear and the oil pump housing. Carnage ensued.

If you want to adjust cam timing, I would probably go for the adjustable gears that the little chain rides on. I haven't been impressed by the fit of Tommis billet products. Doesn't clear the upper timing cover either.

So far my mileage record between breakdowns stands at 917 miles. It's such a nice car when it works though.

# ? May 24, 2016 05:34

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Alabamarama posted:

Just in case you were thinking of buying one...

I recently had my fancy Tommis billet adjustable cam gear throw a bolt, which then lodged between the crank timing gear and the oil pump housing. Carnage ensued.

If you want to adjust cam timing, I would probably go for the adjustable gears that the little chain rides on. I haven't been impressed by the fit of Tommis billet products. Doesn't clear the upper timing cover either.

So far my mileage record between breakdowns stands at 917 miles. It's such a nice car when it works though.

Yeah I've heard a couple horror stories about those, and I'll admit I've been tempted by one but I'd worry about my own competency to risk putting one of those on any of my motors.

# ? May 24, 2016 15:44

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# ? Apr 28, 2024 16:52

CommieGIR: Aug 22, 2006; The blue glow is a feature, not a bug; Pillbug

Test ran with the front springs on the rear of the White 4kQ. Ran like poo poo, so I put the rear springs back on but with the front caps to give it a very minor lift.

Also added a digital speedometer, working on finalizing wiring.

# ? May 24, 2016 21:38

The Something Awful Forums > Discussion > Automotive Insanity > Audi 4000 Quattro/Coupe GT/VW TDI: V.A.G. Ueber Alles

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