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    Thread: 20v head + MK4 2.0L AEG, AZG, and newer (NOT ABA, NOT 9A, NOT G60, etc)

    1. Member twicepardoned's Avatar
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      07-12-2006 10:53 AM #51
      So are you parting out those pistons?
      2006 Volkswagen GTI
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    2. 07-12-2006 01:31 PM #52
      so, last night i did a little calculating of the compression ratios. i did this for my setup, azg 2.0 and 1.8t head. i will post all of the specs later but i came up with two ratios with two formulas. one was 8.8:1
      the other was 9.0:1. can anyone try to firgure out the compression ratio for a newer 2.0 with 20v head. i read in a post somewhere that the compression ratio would be like low 8 or even 7 something. and yes i even calculated the volume of the stock dish and added it into the formula.

    3. Member elRey's Avatar
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      07-12-2006 04:48 PM #53
      on paper all you have to do is compare the difference in volume for the azg 8v HEAD and 20v HEAD. Since everythign else will stay the same.

    4. Member vwpat's Avatar
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      07-12-2006 05:20 PM #54
      Quote, originally posted by elRey »
      on paper all you have to do is compare the difference in volume for the azg 8v HEAD and 20v HEAD. Since everythign else will stay the same.
      exactly, 41cc vs. 30cc so add 11cc to calc.
      edit: I calculate 8.5:1 advertised which will cc about 8.1:1


      Modified by vwpat at 5:38 PM 7-12-2006

    5. Member mystery chip 1.8t's Avatar
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      07-20-2006 03:58 PM #55
      so lets just say,,, u got the head on, u got the whole stock 1.8t turbo set up on with the manifold and intercooler.. to the point it basicallt looks like a 1.8t under the hood. there is no MAP sensor... or vvt.. if u have stock 1.8t injecors in. would it be possible to use an Apexi SAFC to control the fuel? i know that ppl dont uuse them on the 1.8t due to conflicting signals fron the ecu and the safc but on the 2.0 harness IMO there would be no conflict. so basically.. dont run an n75, run the bov/DV fdirectly off the manifold, have a manual boost controler. and let the safc contol the fuel.. what about the fuel pump? is the 1.8t one diff? maybe put in a walbaro 190lph in it? or an inline FP. all this said and done.. do you think you could do this and avoid the software problem?

    6. Member danzig20v's Avatar
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      07-20-2006 10:35 PM #56
      i have a 1.8T right now, rather then building the motor at 1.8l id rather have 2.0l, with good rods
      i really wanna take an AEG bottem end and use that
      but who would make good rods and pistons to handle over 350whp

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      08-02-2006 08:34 AM #57
      Ditto I mean i am confused.. There are a few questions that i would like to get answers to. Like if i am doing this swap into a donor shell. My best bet would be to use a 1.8t engine harness and ecu as far as managemet ?? Also my next question is what are the piston options that i have ?? If i had to get custom pistons what specs would i need on them ?? What about pistons in a N/A buildup ?? Alright thanks

    8. 08-03-2006 12:27 PM #58
      Quote, originally posted by vwpat »
      exactly, 41cc vs. 30cc so add 11cc to calc.
      edit: I calculate 8.5:1 advertised which will cc about 8.1:1

      Modified by vwpat at 5:38 PM 7-12-2006
      <<<<<<<<wow, i haven't seen you on these boards in years...we used to shoot the **** years ago on here, good to see some old peeps still lurking! [IMG]http://**********************/smile/emthup.gif[/IMG]

    9. 09-01-2006 10:13 AM #59
      Alright guys yesterday I ordered my 034 Motorsports 1c kit with high output coil, 550cc Genesis injectors, and billet rods. JE Pistons will be ordered soon. I already have a T3/Super 60, AWW head, AEG block, EIP Stage 2 street clutch, and Bosch fuel pump. We will be building a longitudinal exhaust manifold and USRT style intake manifold. Anything I am missing?

    10. 09-08-2006 12:12 PM #60
      Will the 1.8t intercooler piping work? I already have intercooler from EIP.

    11. 09-24-2006 08:35 PM #61
      Quote, originally posted by elRey &raquo;
      Ahhh, your right. The pistons I linked to are 81mm and will not work.
      I was wrong, I guess VW did not make a 2.0L 20v NA engine.
      For NA application you'll have to get custom pistons made.

      You guess wrong Rey, there is a 2.0L 20v NA engine in Mexico and Europe, its called ALT and you can see more info I posted here: http://forums.vwvortex.com/zerothread?id=2822366

    12. Member twicepardoned's Avatar
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      09-26-2006 11:30 PM #62
      So if there is already this motor out there... then the need to modify the pistons isn't necessary and you could, in reality... either buy this short block OR just the pistons.
      What about the internals on the ALT? Are they forged?
      I sure hope so because that would be lame as hell if they made a 20v 2.0 with cast parts!
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    13. Member twicepardoned's Avatar
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      10-04-2006 09:32 AM #64
      Must not be enough 20v AEG interest... I'm going 2.0T w/ an 8v at this point and I'll swap a 20v down the road I guess...
      Going turbo is just starting to sound easier and cheaper than swapping heads right now... haha
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    14. 10-04-2006 10:31 AM #65
      Well I just got my standalone, high output coil, Raceware head studs, and injectors in the other day. Rods are on the way. I just need to order pistons and I will be all set. The only thing I do not know how to do. I am waiting on someone to get the dimensions for the pistons. If anyone can tell me how to calculate this I would appreciate it.

    15. 10-04-2006 09:21 PM #66
      Some other options to consider for AEG 20V's:
      -oil jets ought to be tapped, especially for boost...right?
      -all audi 5-valve V6 engines (2.8, 3.0) used 82.5mm bore notched pistons, and they are domed.
      from page 18 of big 20v swap thread:
      I pulled a piston from my 2.8 V6 30V today and took some measurements with pics:

      pisons are 82.455mm, notched on both sides, universal for right and left banks. they are slightly domed, although they appear flat next to stock 1.8t's.

      wristpins came in @ 21mm, same as ABA; rod journals are an astounding 54mm; rod length measured 154 mm.

      Head chambers are different; thus, volumes are too.
      left: 30V head chamber. right: 1.8t head chamber
      enlargeable pics are available here:
      http://forums.vwvortex.com/zer...ge=18



      Modified by satchimo at 6:40 PM 10-4-2006

    16. Member twicepardoned's Avatar
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      10-05-2006 09:38 AM #67
      So you're saying that you can pull the pistons from a Audi 5000 and they will work for the 20v conversion?
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    17. 10-05-2006 08:08 PM #68
      Quote, originally posted by twicepardoned &raquo;
      So you're saying that you can pull the pistons from a Audi 5000 and they will work for the 20v conversion?

      not even maybe...
      audi V6 5 valve, or dual overhead cam pistons. Even then it's a maybe. I haven't had them measured by a professional or test fitted them in a block yet, but they are 5 valve pistons. they may be somewhat scarce but I know of 2 core blocks (accident write-offs) full of them as well as my own, so maybe they are becoming more common.
      If I find the time this week I may just try those pistons in my AEG. I will likely need to rebush those rods for 21mm wrist pins, but I may try it just to see.

    18. Member twicepardoned's Avatar
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      10-06-2006 09:57 AM #69
      I am confused my your choice of English... "Not even maybe" Are you saying it's impossible?
      I suppose I wish an impossibility was qualified with a reason.
      So is there a reason why these pistons won't work?
      2006 Volkswagen GTI
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    19. 10-06-2006 10:37 PM #70
      for the lack of clarity...
      audi 5000 pistons (I'm assuming you mean the forged ones from MC turbo motors etc.) are dished to produce 7.8:1 compression in those motors and when using VW 8valve heads. I don't know the cc's off hand, but it's less than the ~43 cc's in a 1.8t/5 valve head.
      Using those pistons with a 20-valve head (or 16v for that matter) will likely drop the compression to 5:1 or 6:1, which is probably too low for combustion to take place.
      sorry for the confusion.

    20. Member twicepardoned's Avatar
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      10-07-2006 09:41 AM #71
      It's all good but wouldn't that be ok if you're throwing a turbo on with high boost?
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      10-08-2006 06:05 PM #72
      Wait im confused, I want to know if those pistons fit in the block ? If those pistons were to be used and the AEB rods were to be used it should raise the C/R and create a plauseable application. How does that sound instead of having custom pistons made. Please let me know because this is interesting

    22. Member twicepardoned's Avatar
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      10-08-2006 09:40 PM #73
      That's exactly what I've been trying to find out... If there are pistons already that can be swapped in I'd rather do it than chopping up some.
      Because then it doesn't seem so hard either
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    23. 10-11-2006 09:55 PM #74
      I have spent the good part of the hour reading all these posts and threads and it all just sounds soooo complicated. To me, why not just get a whole damn 1.8T engine and ecu and sell the 2.0 litre for cheap or keep it as a project motor. I am certainly not an expert on swapping, however, I believe a full long block 1.8T setup dropped in an MK4 2.0 car would only present minor mod problems such as the cooling system. The mount points should be pretty much the same considering the platforms and chassis are identical and they receive three different motors. I am fairly certain the transmissions are the same. I know for a fact the gearing is the same, unless the flywheel and bell housing are different. I do not know, I am just throwing crap out there. I would like to know more, because I know my 115 horse 2.slow is weak sometimes, and there are no good mods to do for this car that are inexpensive and practical. I have done some custom mods on older VW mods, but doing a complete turbo setup on the stock 2.0 8V motor would involve forged pistons, a rebuilt top end, all the turbo components, plumbing for air, oil, and water, and a serious up on the fuel system and electronics. Utter nightmare and ten grand that could be used as a downpayment on a GTI or Jetta that already has a 1.8T and can be easily modded and upgraded for big power gains for less than a grand! At this point, I have accepted the fact that the 2.0 8V aeg/azg is pretty much unmoddable without serious funding, time, and mechanical knowledge. I admire you guys for trying out this stuff and researching and solving the dilemmas, I just do not have the patience for such an immense project. If I get desperate I will add one of those electric superchargers that operate like a garbage disposal in your intake tube! the silly stuff they make these days!

    24. Member vwpat's Avatar
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      10-23-2006 04:12 PM #75
      I have a n/a 2.0 20V engine kit for sale.

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