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VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old December 8th, 2017, 12:24   #76
Windex
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Quote:
Originally Posted by flee View Post
What really matters is the pressure differential between the crankcase pressure
and the intake pressure. Thanks to blowby and the vacuum pump exhaust, this
will always be positive in a NA engine and could push oil through the guides.
Fair enough, but Crankcase pressure in all but the most worn engines I have ever measured would not even register on a standard PSI gauge. Horrible engines would not likely get over 1/2 a PSI (inches of water using a manometer). That and the pressure would relieve through the PCV system unless it was clogged.


You would be much more likely to see oil past the rings in that case.
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Old August 3rd, 2018, 16:36   #77
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Default Engine Coding - Part 1 of 2

Quote:
Originally Posted by jimbote View Post
yes, just go into ecu>coding>enter 00001 > do it
Thanks for the suggestion about checking the automatic transmission mapping, sorry it took a year to get to it:



That was easy, and it helped me understanding that there are code tables loaded for different transmissions in the same ECU. This really helped me make sense of some things in Engine Coding Part 2...

I did find that the auto mapping was very similar to the manual mapping, except for one very important difference: at low rpms there was a jack-rabbit type shudder. Also a fault code for lack of communication with the auto trans control module.

I switched it back to manual mapping, and checked this suggestion off my list of things to try.

There was another suggestion that had been nagging at me though... [continued in part 2]
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Old August 3rd, 2018, 17:23   #78
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Default Engine Coding - Part 2 of 2

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Originally Posted by eddie_1 View Post
I would go back to OEM mapping and just alter the boost maps to atmospheric. You could then play with IQ maps a little bit. At least then you have a baseline that is set up properly. Here you can download edcsuite15:

https://vperformance.co.uk/how-to-re...download-free/
"Just alter the boost maps to atmospheric." Brilliant!

I forgot to mention I had brought the NarfMOBILE out of storage for the Great Lakes Mistake Lemons Rally (details here:Lemons Rally: The Winners and More From the 'Great Lakes Mistake')

I enjoyed driving it so much I got to thinking about how it needs to pass emissions in September. I had three options that I could see to get rid of the check engine light:

A) Most Expensive: re-install turbo, and all those pipes, and have all those issues all over again and, what about the timing belt, and, and, nope - not going there!

B) Less expensive: get a stage 0 tune, get laughed at by engine tuner or pay extra to have a flashzilla shipped to me, seems like a foolish waste of money

C) Practically free: just set the boost maps to atmospheric, YES, that should work, no boost request, no boost available, no harm, no foul, no check engine light, right?

Okay, option "C" it is then. Only problem is, how to download the code from the ECU in the first place? After reading a whole bunch of documentation I finally found a mention using the "Galleto 1260 interface" so I punched that it into Amazon.ca and...



$23.99 in stock in Canada and free shipping? I couldn't believe my luck! Could this thing possibly work? It was worth a try...

Two days later I had this super nice quality cable, and more importantly, the software CD, in my hands:



I plugged it in, and tested every button on the panel, including the download button, which is actually the upload button, whatever, IT WORKS!!!



Now I had file I could open in EDC Suite:



And now to "just alter the boost maps to atmospheric"...



Yup, I just hit "select all" entered "999" and "fill" then clicked the little lightning bolt, hit save, saved the file, uploaded it to the ECU by hitting download, and BLAMO! My ECU no longer looks for boost! I am still laughing 2000 km later with no more check engine light.

I can now add "turbo delete" to anyone's engine tune. LMAO!!!

This is the best part:



I had to go back and review the item on Amazon.ca:



Good times!
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2001 VW Golf Naturally Aspirated Direct Injection Diesel 5MT 620,000 km
With 1.5" lift / Valeo G60/VR6 SMF /
Sprint 520's / RC3 / sweet turbo delete
The NARFmobile blog / push button ignition / thrustmaster shifter / http://youtube.com/narfblast

Last edited by NarfBLAST; August 9th, 2018 at 16:33.
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Old August 3rd, 2018, 17:52   #79
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Do they sell lottery tickets in your area?
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Old August 10th, 2018, 10:59   #80
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Originally Posted by flee View Post
Do they sell lottery tickets in your area?
Haha, they do, but I prefer games with better odds:



This means I can update the registration stickers for two more years of a sweet handling, comfortable ride with ridiculous fuel economy!

Winning!
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2001 VW Golf Naturally Aspirated Direct Injection Diesel 5MT 620,000 km
With 1.5" lift / Valeo G60/VR6 SMF /
Sprint 520's / RC3 / sweet turbo delete
The NARFmobile blog / push button ignition / thrustmaster shifter / http://youtube.com/narfblast
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Old August 10th, 2018, 11:50   #81
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Ridiculous fuel economy? My ALH is stock and I regularly get high 40s, low 50s mpg. Just a little bit of coasting and traffic light timing, along with no tailgating. I'm not sure you can attribute your improved fuel economy to a lack of turbocharging, especially since the turbo improves the VE of the diesel engine.
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Old August 10th, 2018, 20:01   #82
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I meant ridiculous fuel economy compared to our gasoline vehicles.
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2001 VW Golf Naturally Aspirated Direct Injection Diesel 5MT 620,000 km
With 1.5" lift / Valeo G60/VR6 SMF /
Sprint 520's / RC3 / sweet turbo delete
The NARFmobile blog / push button ignition / thrustmaster shifter / http://youtube.com/narfblast
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Old August 13th, 2018, 20:03   #83
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Whispers...

*Timing Belt*
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Old August 14th, 2018, 06:51   #84
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Ill be in MI at the GTG in October...

if parts arrive with your car as well, I might could bring my tools... Just sayin.
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Old October 5th, 2018, 07:57   #85
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Default Performance Improved; Can Climb Hills at Speed Again!

I found out why I was getting a flat spot in power above 2000 rpm, and I fixed it! It is all in the "smoke limit map".

I may be wrong, but I figure The Smoke limit map is in place to prevent smoke while waiting for turbo spool. It controls the amount of fuel allowed at lower airflow readings. These lower MAF readings are usually only momentary, but if there is no turbo then we are stuck in the 450 mg/stroke range for airflow.

At higher naturally aspirated rpms, the mg/stroke actually goes down slightly without a turbo. This is due to increasing vacuum demand on the intake tract (air flow can't keep up with engine speed). So I am only actually using the lower airflow half of the graph (circled in black).

By raising the allowed fuel in that range I suddenly have power all the way to red line! I'm guessing about 60hp maximum vs 40 previously?

The best way I have to measure this performance is my daily "hill climb":
https://www.google.ca/maps/@43.29572.../data=!3m1!1e3

Linked is map of Highway 6 where it climbs the Niagara Escarpment between York road from Dundas to Clappisons Corners in Waterdown. Its a constant grade with 80km/h speed limit. I would consistantly lose speed on this hill and usually fall to 60km/h by the time I reached the top. The speed limit changes to 60km/h at the top anyway.

With the optimized smoke limit map I can now climb the hill at 90km/h. That is a measurable improvement!

Also, there is only a slight haze at wide open throttle.

And, still no check engine light, no codes thrown.

Further to my NA commitment, I cut down my race pipe and ran a shorter section of shop vac hose to it in order to made the 180 degree bend between the intake and the airbox smoother, smaller, and less likely to rub on anything.

Good times!
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2001 VW Golf Naturally Aspirated Direct Injection Diesel 5MT 620,000 km
With 1.5" lift / Valeo G60/VR6 SMF /
Sprint 520's / RC3 / sweet turbo delete
The NARFmobile blog / push button ignition / thrustmaster shifter / http://youtube.com/narfblast

Last edited by NarfBLAST; October 5th, 2018 at 07:59. Reason: paragraphs needed spacing for clarity
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Old October 5th, 2018, 08:20   #86
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My turbos are so large that they don't wake up until 3k rpm plus, most of my driving around town is more or less naturally aspirated short shifting it at 2100 or so, it's still quicker than a totally stock ALH making boost and all.

The amount of restriction made by the stock intake manifold and turbo is very significant. Once you get the smoke maps rounded out to where you're happy, you'll find it a lot quicker off the line than any turbo car.

Were I doing a n/a build I'd get the exhaust manifold from a 2.0 gasoline golf/jetta from the junkyard. There's a really nice tubular one. For the intake there's less available for cheap junkyard stuff, sadly. Having cut one apart and spent a lot of time welding something together, the biggest bottleneck is where it bends down into the ports from the 'box', each one is the size of a quarter.

Good on you for doing something actually different and therefore interesting!
Always dig simple upgrades to reliability, and it don't get any simpler than removing parts that fail all together.
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Old October 5th, 2018, 16:49   #87
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Quote:
Originally Posted by [486] View Post
The amount of restriction made by the stock intake manifold and turbo is very significant. Once you get the smoke maps rounded out to where you're happy, you'll find it a lot quicker off the line than any turbo car.
Perhaps quicker in the first 500ms until the VNT turbo spikes. That's typically the driver's reaction time off the line, so practically speaking NA will not be quicker, even to the 60' mark.
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Old October 15th, 2018, 17:10   #88
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Originally Posted by [486] View Post
For the intake there's less available for cheap junkyard stuff, sadly. Having cut one apart and spent a lot of time welding something together, the biggest bottleneck is where it bends down into the ports from the 'box', each one is the size of a quarter.
So what your saying is that one of these intakes might be worth a try?

Picture stolen from this "for sale" post:
http://forums.tdiclub.com/showpost.p...0&postcount=34


100$CAD is like 75$US... and Kitchener is less than an hour away.


Quote:
Originally Posted by [486] View Post
Good on you for doing something actually different and therefore interesting!
Always dig simple upgrades to reliability, and it don't get any simpler than removing parts that fail all together.
Thanks!
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2001 VW Golf Naturally Aspirated Direct Injection Diesel 5MT 620,000 km
With 1.5" lift / Valeo G60/VR6 SMF /
Sprint 520's / RC3 / sweet turbo delete
The NARFmobile blog / push button ignition / thrustmaster shifter / http://youtube.com/narfblast
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Old October 15th, 2018, 17:51   #89
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$75 seems a bit high to me, but maybe that's what they go for now? Used to be you could get SDI intakes for about $100 shipped over from ebay.co-uk
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