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    Thread: Pistons vs Headspacer, Rods for Bottom End

    1. Member ejg3855's Avatar
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      10-01-2012 10:28 AM #1
      1 - I have read multiple places the bottom end is good for over 500whp, but then I have had people tell me they have heard 400 is where you should invest in rods. So whats the story?


      2 - If you have the engine apart to clean/rebuild it wouldn't it make more sense to go with a 9:1 piston instead of a thicker head gasket? Sans the Cost?


      3 - What is the problem with running boost on the higher compression? the 20v guys run 10:1 and then 25psi. Is this tuning problem? is it engine design ?
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    2. Member Slayer's Avatar
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      2008.5 GTI w/TSI motor, 1995 GTI Vr6
      10-01-2012 11:40 AM #2
      There's no set limit, it's all a guessing game. Headspacers work fine, but its a bandaid. To do it right, rods and pistons is the way to go

      As for the 1.8t guys, those are completely different motors with alot fancier ecu's, so they can deal with pulling timing and such better than the old vr6 ecu's can
      Check out my Garage build thread 2008.5 GTI 2.0 TSI 6MT / APR K04 V3.1, APR IC, CTS 3" turbo back, Carbonio full intake, GFB DV+, BSH TB pipe, SB Stg2 Endurance clutch, BSH mounts, DG Shortshifter, FFM bracket bushings, Forge big knob, Koni coils, Coolingmist CMGS Meth injection, USRT spacer (DO3 & Snow 100 nozzles), 19" Miro stp3's, Centric rotors, Stoptech pads and TyrolSport bushings

    3. Member ejg3855's Avatar
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      1991 GTTI 1.8T Haldex
      10-01-2012 12:10 PM #3
      so the compression issue is more or less a ecu tuning battle? This is easily over come on AFP (mk4 12v) ecus ? Or running standalone I would assume.

      I just don't want to build a motor limited if mid 90's ecu tech is the reason.
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    4. Member Slayer's Avatar
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      2008.5 GTI w/TSI motor, 1995 GTI Vr6
      10-01-2012 01:05 PM #4
      I would still stick with say 9:1 rather than trying to go higher, even if you run standalone. It gives you alot more leeway, and less chance of a melted engine
      Check out my Garage build thread 2008.5 GTI 2.0 TSI 6MT / APR K04 V3.1, APR IC, CTS 3" turbo back, Carbonio full intake, GFB DV+, BSH TB pipe, SB Stg2 Endurance clutch, BSH mounts, DG Shortshifter, FFM bracket bushings, Forge big knob, Koni coils, Coolingmist CMGS Meth injection, USRT spacer (DO3 & Snow 100 nozzles), 19" Miro stp3's, Centric rotors, Stoptech pads and TyrolSport bushings

    5. Senior Member TBT-Syncro's Avatar
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      10-02-2012 11:38 PM #5
      Quote Originally Posted by Slayer View Post

      As for the 1.8t guys, those are completely different motors with alot fancier ecu's, so they can deal with pulling timing and such better than the old vr6 ecu's can
      how so?

    6. Senior Member TBT-Syncro's Avatar
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      10-02-2012 11:39 PM #6
      Quote Originally Posted by ejg3855 View Post

      3 - What is the problem with running boost on the higher compression? the 20v guys run 10:1 and then 25psi. Is this tuning problem? is it engine design ?
      better head and combustion chamber design

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