AAZ, 10mm pump, vnt turbo and 02A gearbox - page 1 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• AAZ, 10mm pump, vnt turbo and 02A gearbox by Bigmick77380 on 11 Aug, 2017 13:40
• Hello everybody !
  
  I've a project for long time on my mk3 TD (my daily), i want to put on my AAZ a 10mm head on my pump, a vnt 1749 for a quick spool and a 02A gearbox (ASD) for a good consumption ( I have all of these pieces exept the gearbox).
  
  I read a lot on the internet about these modification and i have some question....
   
  - for the pump head, what can i do for the dynamic advance timing ? use the aaz, 1y, 1z spring ? An other ? do i need to touch the pressur regulator ? what's the good static advance ? (i would also do the gov mod)
  
  -For the vnt, i have some project for control it, i think to use the exhaust pressur befor the turbo (in addition to intake pressur, if interesting by my project, tell me, i will explain). Or i thinking aboute a holset, but at how many rpm they spool ? i want pressur befor 2000rpm, actually with my K14 i have 0,6bar (8.7 psi) at 2100 rpm, i want a quicker thing...
  
  -for the gearbox i have some probleme, i want to keep my tachometer, by the speed will not be the good one, so i need a solution for this, i think about a Op Amplifier, but i dont know what type of signal the sensor send (voltage ? Ohms ? Hz ?)
  
  Thanks for reading, (i'm french so excuse me if my english is not good )
  If you have some answer for me, i will be greatful !
• #1 by vanbcguy on 11 Aug, 2017 21:02
• Tach signal can come from the alternator, there's a company called Dakota Digital that make a box which takes the signal from the alternator and drives a gasser style tach. Otherwise you have to build something.
  
  CTN gearbox would be a better choice if you have high speed highway driving in your future..
  
  VNT turbo with a standalone controller can be done (I drive one) but it isn't simple. Expect to spend a very long time tweaking and adjusting.
  
  Sent from my LG-H873 using Tapatalk
  
  
• #2 by Bigmick77380 on 12 Aug, 2017 04:55
• First of all, thanks for the answer
  My mistake that's not aboute the tachometer, but the speedometer, i want to keep m'y td style speedometer with a tdi style gearbox, that's the probleme.
  You said CTN, but the ASD is not longer ?
  
  For the VNT, i read your project (withe the MTdi) and other project with arduino, but i dont want a electronical command, i'm not good enought in programation for this :/
  So i think about a standard actuator, and a second actuator that use the exhaust pressure for increase preload of the principal actuator, the exhaust pressur was made with fuel (and boost) right ? so if i press the throttel, i will have more exhaust pressur, so more preload and more boost at the end ! (say me if i'm wrong).
  but i need to know what is the average exhaust pressur (between what and what pressure) for a max intake pressur of 1.3 bar (18psi )
• #3 by vanbcguy on 12 Aug, 2017 20:28
• Ok - there is a mechanical speedometer drive available for the 02A transmission, it can be found in B3 Passats with 4 cylinder engines (diesel or 2.0 16V). Probably in similar era Corrados too.
  
  Pure mechanical vane control can be done but it is complicated. You want the vanes as open as possible during normal driving - if they are closed they restrict the exhaust and reduce fuel economy. Search some of Libby's posts in here for his setup, it works. Exhaust pressure starts high and then should fall close to equal to boost pressure once the turbo spools, it would be tricky to use that as an input alone.
  
  Sent from my LG-H873 using Tapatalk
  
  
• #4 by Bigmick77380 on 13 Aug, 2017 05:19
• For the speedo, i have an MK3 golf, so it is not a mechanical drive, it's an electronical, so that's why my question, what type of signal the electronical drive do ?
  
  What's the best boost pressur for normal driving ? the lower one ? I think i already see the Libby's controler (not sure), is that the one with the throatle cable (between the pump and the turbo)  ? I search some thread about it but the pictures are not available anymore :/
  
  For the systeme that i want to make, i think i will draw something, that's hard to explain without an image
• #5 by Bigmick77380 on 13 Aug, 2017 06:33
• 
  
  That's what i thinking:
  -in the upper draw, it is at normal drive, the exhaust actuator is not crack, vnt is full open at 0.6 bar (8 psi).
  -in the lower draw, a full throatle , exhaust actuator is cracked, compress the spring for add more load at the intake actuator, vnt is fully open at 1.4 bar (20 psi).
  
  that is the theory !
• #6 by Bigmick77380 on 16 Aug, 2017 13:07
• Nobody know the type of the speedo signal ?
• #7 by RunninWild on 16 Aug, 2017 13:55
• Cant help you with the Speedo but I originally wanted a vnt like yourself. I eventually gave up because it just seemed too complicated to get the vanes to function properly. I eventually got a holset he211 off eBay second hand for very cheap from a Chinese seller. I've got my build to the test driving stages and although I don't have a functioning tach at the moment at stock settings the holset is making 26psi, I've got my giles pump set about as high as I can without the idle going crazy and egts don't get much above 1000f without an intercooler. Its making tons of power and is extremely fun to drive. Highly recommend the holsets if you are willing to put in the work to mount it. Without a tach its hard to judge when it starts making boost but id guess the lda is opening around 2000-2500rpm and as soon as that happens the boost instantly jumps to 26psi and there is a massive increase in power.
• #8 by Bigmick77380 on 16 Aug, 2017 15:14
• Thank's for the answer, i gona try my vnt system first, i think i can have good results with this !
  If that don't work, go for a holset (he221 or he200wg, don't know...), my LDA aproximately open at 0.6 bar (8,7 psi) of boost, so i think that will spool quick
  
  Actually, i don't know how many horspower i have. I have a custom LDA, max fuel screw screwed until i can't lower the idle, K14 with 1.1 bar (16psi), no intercooler (i have a AWIC but not the time for instal it)
  
  
• #9 by burn_your_money on 18 Aug, 2017 02:03
• Quote from: Bigmick77380 on 13 Aug, 2017 05:19

  For the speedo, i have an MK3 golf, so it is not a mechanical drive, it's an electronical, so that's why my question, what type of signal the electronical drive do ?
  

  
  That's what he was saying. The b4s and corrados have a mechanical speedo sensor in the transmission that converts the signal to electronic. There are no fancy adaptors needed, it's all stock. Just make sure to match the final drive ratios.
  
  This is it
  
  http://forums.vwvortex.com/showthread.php?5772919-FS-02J-speed-sensor
• #10 by Bigmick77380 on 18 Aug, 2017 07:18
• Thanks for the answer, but i know this sensor, it is the same in golf 3 tdi, but in 020 gearbox (what i have actualy), the drive is on the secondary shaft, and in the 02A gearbox, the drive is on the differential, so absolutely not the same gear racio, that is why i need an ellectronical signal converter
• #11 by burn_your_money on 19 Aug, 2017 01:34
• The B4 uses a 02A.
• #12 by vanbcguy on 19 Aug, 2017 12:09
• I swapped my 020 in my Mk3 with an 02A. Other than extending the wires for the speed sensor I didn't have to change anything or use any sort of converter.
  
  Sent from my LG-H873 using Tapatalk
  
  
• #13 by Bigmick77380 on 19 Aug, 2017 13:32
• Seriously ? you just swap the gearbox and the speedo was plug and play ? No probleme of uncorect speed (like more speed in reality than on the speedo) ?
  Because i read some post about that, that's why i thinks about an signal modifier, but if i said that's good, i'm happy
  
  
• #14 by vanbcguy on 20 Aug, 2017 19:51
• Correct, didn't need to do anything else. Speedometer read the same before and after.
  
  Sent from my LG-H873 using Tapatalk