VCDS and OBD diagnostic device in the On-Board Diagnostics Shop
Diesel technology, engine technology, vehicle diagnostics, repair & maintenance.

Registeraufladung AFN... | Posts 48+

 
Go to page: Previous  1, 2, 3, 4
New Topic Reply 🔗 🖨 Dieselschrauber - Index » Diesel Engine Technology
Author Message
R.M.
Schrauber
Schrauber


Joined: 06/15/2004
Posts: 389
Karma: +14 / -0   Thank you, like it!
Location: DD

Support

Post29-06-2009, 12:27    Subject: Quote

Interesting discussion...

I would also, based on my gut feeling, opt for a check valve. If this fundamentally works, we can still look for better solutions.

Sure, the Roots blower can handle that amount of diesel engine RPM. The question is how much power is being wasted due to the "unnecessary" rotation. But he no longer has to compress it.


Translated on 04-07-2026, 8:30.
Back to top Profile PM
Held467
Blaumann
Blaumann


Joined: 09/20/2006
Posts: 479
Karma: +5 / -0   Thank you, like it!


Premium Support

Post29-06-2009, 19:39    Subject: Quote

35i-299 wrote:
icon_rolleyes.gif

How would you do that?

not at all icon_wink.gif
Get a turbocharger, larger injectors, possibly a bigger fuel pump, head porting, and a larger exhaust system.
Just fine-tune everything and it'll be good; there's enough power coming through.


Translated on 04-07-2026, 8:31.
Back to top Profile PM
TDI-GTI-4-Motion
Profi-Schrauber
Profi-Schrauber
Avatar-TDI-GTI-4-Motion

Joined: 02/22/2009
Posts: 3872
Karma: +127 / -0   Thank you, like it!

2002 Volkswagen Golf Consumption
Premium Support

Post29-06-2009, 19:56    Subject: Quote

35i-299 wrote:
No, not a TSI STG.

When working with a check valve, the shutdown process could be implemented using a differential pressure switch.

If I replace the check valve with the "throttle valve" from the AEY engine and control it with boost pressure from the turbocharger, then it would be possible to use a microswitch that, when the valve is fully open, shuts off the turbocharger via a relay.

Best regards.
Sven

It will still jerk, guaranteed! Maybe not when turning it off, but definitely when turning it on. You wouldn't believe how complicated it is to smoothly engage or disengage something using a magnetic coupling. Just leave the thing running. Everything else will be subpar or very expensive.
MfG. Michael

VW Golf IV TDI GTI 4-Motion Bj.2002 MKB/GKB: ARL/FEK
VW T4 Pritsche TDI Bj.1999 MKB/GKB: AXG/AFK (Selfmade)


Translated on 04-07-2026, 8:32.
Back to top Profile PM Garage
35i-299
Blaumann
Blaumann


Joined: 08/19/2007
Posts: 114
Karma: +1 / -0   Thank you, like it!

2004 Volkswagen Passat Consumption
Premium Support

Post27-07-2009, 0:23    Subject: Quote

Okay, after much deliberation and consideration, I've been convinced to change my mind.

I'll let him join.

Okay, for now I'm still in the process of fitting a bracket for the alternator, and then I'll move on to the belt drive.

Sure, here's the translation:

"MFG" is an abbreviation for "Mit freundlichen Grüßen," which translates to "Sincerely" or "Best regards" in English.
-------------------------------------
96´Passat 35i TDI AFN Syncro
Umbau auf 4-Motion
-------------------------------------
04´Passat 3BG V6 TDI 4-Motion


Translated on 04-07-2026, 8:34.
Back to top Profile PM Garage
dieselschrauber
Administrator
Administrator
Avatar-dieselschrauber

Joined: 04/12/2002
Posts: 18017
Karma: +787 / -0   Thank you, like it!
Location: St.Gallen
2018 Volkswagen T6 Consumption


Post27-07-2009, 9:27    Subject: Quote

Please provide photos icon_smile.gif.

I think the mechanical aspect is one thing, but getting everything calibrated so that it works reliably in the long run will be the more challenging part. I have an idea, but of course, it's all just speculation.
Apart from that, a continuously running compressor consumes a significant amount of fuel, which makes it something I would seriously hesitate to install in my own car or a non-competition vehicle.

To be honest, I don't have much hope, but it would be great if you could still manage to do it.

Best regards, Rainer.


Translated on 04-07-2026, 8:35.
Back to top Profile PM WWW Garage
35i-299
Blaumann
Blaumann


Joined: 08/19/2007
Posts: 114
Karma: +1 / -0   Thank you, like it!

2004 Volkswagen Passat Consumption
Premium Support

Post27-07-2009, 9:59    Subject: Quote

I can offer you a photo...

This is from the Rohan adapter for the charger mount, from two weeks ago.

You're absolutely right, Rainer, the voting process will be quite something.
Time brings wisdom. My other ideas have also, so far, somehow worked.

If you have any ideas, please share them. I can use any support.
For me, fuel consumption is not a priority at all.

I hope I can manage to do it, because otherwise, all the effort, sweat, and brainpower that went into it would be wasted.
But as they say, "learning by doing."


Best regards.
Sven.



k-SDC11365.JPG
 Description:
 
 File size:  133.52 KB
 Viewed:  1877 times

k-SDC11365.JPG

-------------------------------------
96´Passat 35i TDI AFN Syncro
Umbau auf 4-Motion
-------------------------------------
04´Passat 3BG V6 TDI 4-Motion


Translated on 04-07-2026, 8:36.
Back to top Profile PM Garage
dieselschrauber
Administrator
Administrator
Avatar-dieselschrauber

Joined: 04/12/2002
Posts: 18017
Karma: +787 / -0   Thank you, like it!
Location: St.Gallen
2018 Volkswagen T6 Consumption


Post27-07-2009, 11:31    Subject: Quote

Just a side note: What have you done to ensure that your AFN (presumably an engine type) can withstand more than 5000 km of head gasket replacement with the attached turbocharger?


Translated on 04-07-2026, 8:37.
Back to top Profile PM WWW Garage
vwSchrauber
Profi-Schrauber
Profi-Schrauber


Joined: 09/18/2008
Posts: 1262
Karma: +42 / -0   Thank you, like it!


Support

Post27-07-2009, 14:05    Subject: Quote

@Rainer: Are you concerned about the weight of the charger (support) and the potential tilting loads on the front screws, or about the peak pressures that could stretch the screws?

Screws from PD? Stud bolt?
selber schrauben - statt Werkstattpfusch


Translated on 04-07-2026, 8:38.
Back to top Profile PM
35i-299
Blaumann
Blaumann


Joined: 08/19/2007
Posts: 114
Karma: +1 / -0   Thank you, like it!

2004 Volkswagen Passat Consumption
Premium Support

Post27-07-2009, 16:12    Subject: Quote

Head bolts and compression are reduced due to worn pistons.

Sure, here's the translation:

"MFG" is an abbreviation for "Mit freundlichen Grüßen," which translates to "Sincerely" or "Best regards" in English.
-------------------------------------
96´Passat 35i TDI AFN Syncro
Umbau auf 4-Motion
-------------------------------------
04´Passat 3BG V6 TDI 4-Motion


Translated on 04-07-2026, 8:38.
Back to top Profile PM Garage
Held467
Blaumann
Blaumann


Joined: 09/20/2006
Posts: 479
Karma: +5 / -0   Thank you, like it!


Premium Support

Post27-07-2009, 16:48    Subject: Quote

Wouldn't it be more sensible to remove the pistons?


Translated on 04-07-2026, 8:39.
Back to top Profile PM
dieselschrauber
Administrator
Administrator
Avatar-dieselschrauber

Joined: 04/12/2002
Posts: 18017
Karma: +787 / -0   Thank you, like it!
Location: St.Gallen
2018 Volkswagen T6 Consumption


Post27-07-2009, 17:44    Subject: Quote

Sure.


Translated on 04-07-2026, 8:39.
Back to top Profile PM WWW Garage
New Topic Reply 🔗 🖨 Dieselschrauber - Index » Diesel Engine Technology
Go to page: Previous  1, 2, 3, 4
Jump to:  
You cannot post new topics in this forum.