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    Thread: At what power levels are a "worked" set of ABA rods obsolete?

    1. Member
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      1992 MR2 turbo
      10-15-2010 03:35 PM #1
      Everyone knows that ABA rods are GOOD in stock form, at what point would a set of shotpeened/magnafluxed/resized/balanced stock ABA rods NOT be up to the task?

      Im talking about high HP on a daily basis (boost obviously is the name of the game here).

    2. Member CrankDaBewstmun's Avatar
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      1991 GTI ABA 8VT, 1987 Scirocco 16V, 2000 GTI 1.8T K04, 2007 B6 Wagon chipped
      10-15-2010 04:28 PM #2
      I have stock rods in my aba-T. 12-15 psi for two years now. Not driven all year round though, car gets stored over the winter. Dynoed at the wheels 178 hp, 240 ft-lbs.

      If you are going stock rods:

      1. Use ARP bolts on the rod caps (have big end re-sized after install). I did not do this but I bet it would increase strength. I'm doing this for a 16VT project (already done just need to put the motor together)
      2. Like you said any additional processing is likely to help strength such as shot peening, balancing etc.

      Big reason that rods blow through blocks=Over-revving. If you properly size the turbo, you can keep the rev range down, make lots of torque low to mid rpm and have fun without blowing stuff up. All it takes is a mis-shift to over-rev and break things.

      Read up on how inertial forces work inside an IC engine. You would be surprised how rpm increases the load (forces) exponentially on connecting rods vs. actual output power increasing. I read this in Corky Bells book called "maximum boost". Great read

    3. Member Jay-Bee's Avatar
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      10-15-2010 06:01 PM #3
      See SalsaGTI's 2.0T for any concerns on power, 300+ whp on stock ABA bottom end, however ANY build can fail if the recipe is off.
      Quote Originally Posted by Fritz27 View Post
      I read this in Samuel L. Jackson's voice to make it more interesting. That's all I got.
      2005 VW Passat Wagon 1.8T 4Motion 5M/T [Current]
      2007 A4 Avant 2.0T Q/MT [Sold]
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    4. Member
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      10-15-2010 09:38 PM #4
      arp hardware would be a given, i forgot to mention that, 400hp is the goal here, i wont be converting to solid lifters or anything like that so the revs will be kept to a max of 6500.

      so the largest benefit of going to, say, a set of IE rods would be weight savings?

    5. Member
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      04-23-2012 09:07 PM #5
      when installing arp rod bots it is required to have the rods resized goodluck if you diddnt

    6. Member Prof315's Avatar
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      04-24-2012 11:26 AM #6
      Quote Originally Posted by nextproject View Post
      arp hardware would be a given, i forgot to mention that, 400hp is the goal here, i wont be converting to solid lifters or anything like that so the revs will be kept to a max of 6500.

      so the largest benefit of going to, say, a set of IE rods would be weight savings?
      No IE rods (and Scat Rods for that matter) use ARP 2000 Cap screws,much stronger than even ARP pro series rod bolts. A bottom end, properly built with IE or scat rods and good pistons should be just about bulletproof.
      The Professor
      Melbourne, FL
      92 Corrado OBD2 ABA Powered by MS3Pro
      Linfert Performance: The Megasquirt guy in central Florida Like my Facebook page....
      Sandy Linfert 11/4/1991 - 5/13/2013

    7. Moderator root beer's Avatar
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      04-26-2012 11:51 AM #7
      I'm going to see what stock rods with ARP's jammed in can handle with nitrous. Not the same torque curve as you turbo folk, but i'm betting they'll hold 350whp.
      How to build a relatively inexpensive, reliable, powerful VR6
      I am ready, I am

      I want to buy some 4x100 15" Pininfarinas. If you have one of the few sets i've seen, please let me know.

    8. Member Prof315's Avatar
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      04-26-2012 12:08 PM #8
      Quote Originally Posted by root beer View Post
      I'm going to see what stock rods with ARP's jammed in can handle with nitrous. Not the same torque curve as you turbo folk, but i'm betting they'll hold 350whp.
      FYI, ARP 5/16" 289 Ford rod bolts also fit. A set of 8 pro series wave locs costs about the same as a standard knurled VW set. MUCH stronger.
      The Professor
      Melbourne, FL
      92 Corrado OBD2 ABA Powered by MS3Pro
      Linfert Performance: The Megasquirt guy in central Florida Like my Facebook page....
      Sandy Linfert 11/4/1991 - 5/13/2013

    9. Moderator root beer's Avatar
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      04-26-2012 12:10 PM #9
      Hmph, good info
      How to build a relatively inexpensive, reliable, powerful VR6
      I am ready, I am

      I want to buy some 4x100 15" Pininfarinas. If you have one of the few sets i've seen, please let me know.

    10. Member Salsa GTI's Avatar
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      04-26-2012 02:14 PM #10
      I was going to go for 400 wheel with stock everything on the bottom of an obd2 ABA
      but my life got in the way and i sold the car and stopped vortexing...

    11. Member Salsa GTI's Avatar
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      2000 GTI VR6 ....... A founding Member of the 8v 300+whp Club
      04-26-2012 02:15 PM #11
      Quote Originally Posted by Jay-Bee View Post
      See SalsaGTI's 2.0T for any concerns on power, 300+ whp on stock ABA bottom end, however ANY build can fail if the recipe is off.
      320whp to be exact
      and anything can fail with a chip tune...OOps did i say that...LOL

    12. Moderator root beer's Avatar
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      04-26-2012 02:16 PM #12
      Come on man, sell the car whatever, but don't stop vortexing

      I keep having to find new armpits of the forum where people might not suck.
      How to build a relatively inexpensive, reliable, powerful VR6
      I am ready, I am

      I want to buy some 4x100 15" Pininfarinas. If you have one of the few sets i've seen, please let me know.

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