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    Thread: AFP (MK4 VR6) intake manifold swap/info/pics/DIY/ect?

    1. Geriatric Member steveo27's Avatar
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      02-06-2012 09:29 PM #1
      I am looking for more information on the MK4 AFP VR6 intake manifold swap on a MK3 AAA motor using MK3 wiring/ECU. I've been searching around for a while, and havent come across too much beside a bunch of bickering about how its a waste of time and money & ive only found a few decent pics of it....





      From the looks of it, an OBD2 throttle body fits (upside down) if you run a cable guide.

      as for the "shifter" in the manifold, it appears to be vacuum controlled via the same line as the FPR and it operates the same way as a Schrick VGI manifold.

      Schrick -



      vs.

      AFP -




      #6 - flap acutator
      #27 - solenoid
      #23 - vacuum reservoir

      and use an RPM switch as the control device to control the solenoid.

      Something like this -



      http://www.summitracing.com/parts/SUM-830449-1/?rtype=1
      I was wondering if anybody in MK3 land has done this beside the one car I've seen?
      Last edited by steveo27; 02-07-2012 at 11:59 AM.
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    2. Member Scotty_2.0's Avatar
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      02-06-2012 10:47 PM #2
      In for answers although I have no real interest in swapping myself

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      02-06-2012 11:07 PM #3
      reason to swapping to a mk4 mani? i would think for the cost/effort it would be easier to go SRI or 2.9 clone
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    4. Geriatric Member steveo27's Avatar
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      02-07-2012 01:11 AM #4
      Cheaper to do the AFP manifold.

      TTT
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      02-07-2012 03:57 AM #5
      Hi,
      AFP manifold has equal runner lenghts. This is because VR runner lenght compensation is build/made in the camshafts design, i.e rear and front cams have different (actually opposite symetrical ) phases and valve strokes. AAA engine cams have similar cam profiles but different inlet runner lenghts(compensated). So, the conclusion is AFP manifold should go with AFP cams.
      Just FYI

    6. Geriatric Member steveo27's Avatar
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      02-07-2012 11:39 AM #6
      I understand that. I plan on swapping in a complete AFP motor into my car to replace the current AAA motor with 2 spun rod bearings.

      I have the opportunity to purchase a complete motor for next to nothing.
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    7. Member Grabbit's Avatar
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      02-08-2012 04:09 AM #7
      Bump for steveo, I'm looking to do this, It seems like a complete manifold swap, cams and even a head gasket/ valve job would be as much as a used shrick manifold.

      for more torque and streetability

    8. Geriatric Member steveo27's Avatar
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      02-08-2012 12:57 PM #8
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    9. Geriatric Member steveo27's Avatar
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      02-09-2012 02:35 AM #9
      anyone else?

      AAA dyno curve -




      AFP dyno curve (stock in blue. catback exhaust in red) -



      the AFP produces more low end torque, but how much of this is attributed to the manifold/cams vs MK4 ECU?
      Last edited by steveo27; 02-09-2012 at 03:07 AM.
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    10. Geriatric Member steveo27's Avatar
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      02-13-2012 02:25 AM #10
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    11. Member Ultramagnus0001's Avatar
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      02-13-2012 01:32 PM #11
      When the change over flap in the manifold stopped working on my AFP, it felt like I loaded the car up with fat people and then it would come back on like a turbo after 4000 so RPMs.
      You can get a smooth, quiet, floaty car and fall asleep waiting to get from point A to B, or enjoy getting there.
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      02-13-2012 02:01 PM #12
      You can clearly see the effect it has a 4200 RPM. Notice how the Torque curve seems to start plummeting at 4K then levels back out again before dipping around 4200.

      Coming from a 24v to my dizzy VR6 that loss is terribly noticeable. I'm also interested in this. Except I won't be doing an engine swap or OBD2 conversion.
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    13. Geriatric Member steveo27's Avatar
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      02-13-2012 03:45 PM #13
      funny you mention dizzy VR.. that is what is currently in my MK4 that i plan on changin out..
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    14. Member Grabbit's Avatar
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      02-15-2012 11:16 AM #14
      anyone know if a mk3 OBDII TB will work or if not if a MK4 TB will plug in/adapt/work with OBDII?

    15. Geriatric Member steveo27's Avatar
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      02-15-2012 12:21 PM #15
      The first 2 pictures posted looks to be a MK3 OBD2 throttle body
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      03-16-2012 09:12 AM #16
      Any updates on this? Have you taken a crack at it?
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    17. Geriatric Member steveo27's Avatar
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      03-17-2012 10:38 AM #17
      Nothing yet. Been WAY too busy with work and other stuff.
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    18. Member 93wolfsburg's Avatar
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      04-08-2013 12:13 PM #18
      Any updates on this?

      I am working on doing this same thing on my corrado, for me its more about aesthetics and the fact that i'm going vrt it would be easier for me to have the inlet on the drivers side.

      I have concerns about the fuel injection. I dont really know a whole lot about injectors that fit in a stock mk4 manifold other than they look much different than the bosch style ones from the AAA motor.

      Does anyone know if they will work with a mk3 obd2 ecu? If not will the bosch style fit in their place?

    19. Geriatric Member steveo27's Avatar
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      04-08-2013 01:00 PM #19
      Nothing. Sorry, never went through with this as I got bored with the car.

      The research I did pointed me towards swapping all the MK4 stuff in and using the MK4 ECU
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      04-08-2013 02:02 PM #20
      Interesting. I'll have to check tonight to see if the mk4 injectors are high or low impedance. I would imagine as long as both are the same impedance and flow the same rate it wouldnt matter what engine management.

      Just curious how were you planning on sealing off what i guess is air injection on the lower half of the intake manfiold? Just a plug and a clamp?

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      04-08-2013 09:19 PM #21
      so i ohm'ed out the mk4 and mk3 injectors they were 15.5 and 15 respectively. I think its safe to say we can interchange them i'm not sure about the flow rate though does anyone know the flow rates on stock injectors?

      I guess in my case i'll just get whatever (mk4) injectors my software requires

    22. Member mk21.8Tjetta's Avatar
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      07-13-2014 07:51 AM #22
      Has anyone made this swap yet?? I want to do it over the winter if possible...
      Last edited by mk21.8Tjetta; 07-15-2014 at 10:22 AM.
      I have LOTS of bits and pieces from mk2 and mk3 parts cars. PM me!!
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    23. Banned Boogie_manVR6's Avatar
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      07-14-2014 09:13 AM #23
      Quote Originally Posted by vr-vagman View Post
      Hi,
      AFP manifold has equal runner lenghts. This is because VR runner lenght compensation is build/made in the camshafts design, i.e rear and front cams have different (actually opposite symetrical ) phases and valve strokes. AAA engine cams have similar cam profiles but different inlet runner lenghts(compensated). So, the conclusion is AFP manifold should go with AFP cams.
      Just FYI
      That's right.
      Besides all the hassle to swap intake manifold, cams and wire up the change over valve solenoid in return for 3-5 more ft.lb of torque isn't worth it in my opinion.

    24. Member mk21.8Tjetta's Avatar
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      07-14-2014 12:37 PM #24
      Quote Originally Posted by Boogie_manVR6 View Post
      That's right.
      Besides all the hassle to swap intake manifold, cams and wire up the change over valve solenoid in return for 3-5 more ft.lb of torque isn't worth it in my opinion.
      From the dyno charts I've seen its a hell of a lot more tq then 3-5. And its not just out right gains...the torque curve way bigger...
      I have LOTS of bits and pieces from mk2 and mk3 parts cars. PM me!!
      Quote Originally Posted by mk21.8Tjetta View Post
      Can a duck with a boner avoid dragging sea weed??
      Quote Originally Posted by onlyrotary17 View Post
      Translation in Google Translate.
      "Hi I `have a jetta mk2 1.6 td but now the timing belt has fart so the engine..."

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      07-14-2014 02:47 PM #25
      Well that's good if you think it's worth they hassle, to each his own.
      Found something interesting reading material I would like to share with all of you:
      http://www.volkspage.net/technik/ssp/ssp/SSP_212.pdf

    26. Member mk21.8Tjetta's Avatar
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      07-14-2014 04:59 PM #26
      Quote Originally Posted by Boogie_manVR6 View Post
      Well that's good if you think it's worth they hassle, to each his own.
      Found something interesting reading material I would like to share with all of you:
      http://www.volkspage.net/technik/ssp/ssp/SSP_212.pdf
      I read this a while back and is why I want to do the swap. I think you should read it yourself (maybe vr-vagman also) so you can understand that the manifold is not equal length.

      Also in regards the vr-vagmans comments, I dont see why you need to use AFP cams with the AFP manifold. None of the aftermarket companys make AFP specific cams. I suppose if you want stock cams then yes, AFP cams would be best with the AFP manifold. But I would like to measure them both to see what the difference is...if any.
      I have LOTS of bits and pieces from mk2 and mk3 parts cars. PM me!!
      Quote Originally Posted by mk21.8Tjetta View Post
      Can a duck with a boner avoid dragging sea weed??
      Quote Originally Posted by onlyrotary17 View Post
      Translation in Google Translate.
      "Hi I `have a jetta mk2 1.6 td but now the timing belt has fart so the engine..."

    27. Banned Boogie_manVR6's Avatar
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      07-15-2014 09:58 AM #27
      Quote Originally Posted by mk21.8Tjetta View Post
      I read this a while back and is why I want to do the swap. I think you should read it yourself (maybe vr-vagman also) so you can understand that the manifold is not equal length.

      Also in regards the vr-vagmans comments, I dont see why you need to use AFP cams with the AFP manifold. None of the aftermarket companys make AFP specific cams. I suppose if you want stock cams then yes, AFP cams would be best with the AFP manifold. But I would like to measure them both to see what the difference is...if any.
      I've read it many times so I don't need to read it again...Good luck with your experiment.

    28. Member mk21.8Tjetta's Avatar
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      07-15-2014 10:23 AM #28
      Quote Originally Posted by Boogie_manVR6 View Post
      I've read it many times so I don't need to read it again...Good luck with your experiment.
      Thank you
      I have LOTS of bits and pieces from mk2 and mk3 parts cars. PM me!!
      Quote Originally Posted by mk21.8Tjetta View Post
      Can a duck with a boner avoid dragging sea weed??
      Quote Originally Posted by onlyrotary17 View Post
      Translation in Google Translate.
      "Hi I `have a jetta mk2 1.6 td but now the timing belt has fart so the engine..."

    29. 08-27-2014 11:08 PM #29
      I did this on my motor a few years back. Used stock mk3 injectors with doubled up mark 4 o rings on it, had to bend the mk4 fuel rail to fit with the longer injectors.

      Hooked up an aftermarket rpm switch from summit for the changeover.

      Pulled great from 2k at any speed. Even with a mk3 headgasket and cams it ran great.

    30. Member mk21.8Tjetta's Avatar
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      08-27-2014 11:13 PM #30
      Awesome!! I will be looking for those parts to do this. Thank you for the advice!
      I have LOTS of bits and pieces from mk2 and mk3 parts cars. PM me!!
      Quote Originally Posted by mk21.8Tjetta View Post
      Can a duck with a boner avoid dragging sea weed??
      Quote Originally Posted by onlyrotary17 View Post
      Translation in Google Translate.
      "Hi I `have a jetta mk2 1.6 td but now the timing belt has fart so the engine..."

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