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    Thread: build my 1.8 or drop in 2.0

    1. Junior Member mk2jettaproject's Avatar
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      mk4 gti 1.8t, 88 fox
      04-29-2012 12:30 AM #1
      i am deciding if i want to build my 1.8 and turbo it or put in a 2.0. i have never been a fan of the 2 liter ran the 1.8 in my mk2 jetta and now my fox. mk4 also has a 1.8t but thats a whole different ball game.. if i could get some feedback that would be great.

    2. Member
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      04-29-2012 03:00 PM #2
      Is 1.9 an option?

    3. Member voxwagen88's Avatar
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      04-29-2012 09:56 PM #3
      Here's Jonathan's Old Recipe for a 1.85 that should be up to boost.


      Engine is 1.7L crankshaft, MC1 pistons, 1.8L block, ported head with the aforementioned stainless 41/34 valves, three-angle grind. Stock 1.8L cam, but we might switch to the shorter duration ABA cam for better midrange and torque. DBG admits that he seldom revs past 5K, so we will try to make the most of that part of the power band.

      If I'm right, 1.7L crank is same stroke as Fox (86.4mm) however it use a 46mm rod journal instead of the 48mm like most VW. MC engine (2.2L 5-cyl Turbo) also use 46mm rod journal and also have a 86.4mm stroke and 81mm bore but use 136mm rod instead of the Fox's 144mm. More importantly, MC engine had forged pistons and stronger rods so the 1.7L crank let use the MC pistons and rods into a 1.8L block. This is a perfect low price setup for a turbo engine because it give you a 7.8:1 compression ratio and a stronger block.

    4. Member vwturbofox's Avatar
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      1989 vw fox gl turbo, Holset hx35w on meth:)new project 1968 bug and o 86 gti
      04-30-2012 01:46 AM #4
      i love the 2.0 aba i have a aba short block whith the 1.8 big valve head. also have a turbo on it but then again i hade the motor bored out so it's really a 2.5t but still a 2.0 block.
      the 1.8 are good blocks if you want more power go with 2.0 but the decision is yours both have pro's and con's

    5. 04-30-2012 11:09 AM #5
      I would always vote for the 2.0 if you are speaking about the ABA. If you get a good head and nice cams especially if you are going turbo, they are very hard to beat and cheap. I thought the most you could really stroke an ABA was 2.2 and I thought that was a push? Most with the diesel crank and some work on the pistons end up around 2.1.

    6. Member 90quattrocoupe's Avatar
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      04-30-2012 07:45 PM #6
      Quote Originally Posted by Mr Roo View Post
      I would always vote for the 2.0 if you are speaking about the ABA. If you get a good head and nice cams especially if you are going turbo, they are very hard to beat and cheap. I thought the most you could really stroke an ABA was 2.2 and I thought that was a push? Most with the diesel crank and some work on the pistons end up around 2.1.
      Get an early ABA, up to 95. They had a forged crank and piston squirters. Later ones don't.

      Greg W.
      They have my car when they pry my dead cold fingers from the steering wheel.

    7. Member themagellan's Avatar
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      05-01-2012 12:27 AM #7
      Quote Originally Posted by vwturbofox View Post
      i love the 2.0 aba i have a aba short block whith the 1.8 big valve head. also have a turbo on it but then again i hade the motor bored out so it's really a 2.5t but still a 2.0 block.
      the 1.8 are good blocks if you want more power go with 2.0 but the decision is yours both have pro's and con's
      Normally with you vwturbofox but you are more than wrong. Your block is NOT bored out to a 2.5 at most you would have a bit over a 2.1.


      OP- Look through this dudes build page- http://forums.vwvortex.com/member.php?591528-ChevyAndVW

      the full ABA swap is pretty sweet if you can add in a SRI!

    8. Member vwturbofox's Avatar
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      1989 vw fox gl turbo, Holset hx35w on meth:)new project 1968 bug and o 86 gti
      05-01-2012 12:53 PM #8
      Quote Originally Posted by themagellan View Post
      Normally with you vwturbofox but you are more than wrong. Your block is NOT bored out to a 2.5 at most you would have a bit over a 2.1.


      OP- Look through this dudes build page- http://forums.vwvortex.com/member.php?591528-ChevyAndVW

      the full ABA swap is pretty sweet if you can add in a SRI!
      sorry wrote the wrong number your right it's a 2.1 not a 2.5 it was bored 50 thousance over

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