Fourtitude.com - Frankenturbo F21 + stock tune "Review"
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    1. 04-07-2013 05:07 PM #1
      So on my way to get my tune 1hr drive i got to test how the F21 was on a stock tune, my modifacations include:
      3" sx-power downpipe 3" turboback w/cherrybomb vortex muffler
      home made 3" volocity intake
      intake manifold power gasket
      Stock injectors
      Stock maf
      F21 turbo kit w/Manifold and TIP

      the boost jumps rite up to 0.8bar 11-12ish psi and stays there. with out the upgrade to tune i would recommend the turbo over a replacement k03s any day, the exhaust note is deeper and the induction noise is louder. for 1000.00 you wont get a better "direct fit" upgrade.

      this is a 3rd gear pull & I'm not a Timberlake fan it was just on the radio. sorry.
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    3. Former Advertiser
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      04-07-2013 05:55 PM #2
      Is that digital gauge down by your right foot showing boost? How are you controlling the turbo while on K03 software? MBC?

    4. 04-07-2013 06:32 PM #3
      Quote Originally Posted by doug@frankenturbo.com View Post
      Is that digital gauge down by your right foot showing boost? How are you controlling the turbo while on K03 software? MBC?
      yes thats my electrinic boost gauge by my RT foot it accurate within .1bar, its actully on the side bar of the TT center console. its in BAR not psi. I would recommend running a MBC paralleled with j-valve. to prevent boost spike in the lower gears. i did NOT adjust the wast-gate actuator. if you notice it jumps to 1.0bar @ 2.3k rpm I'm sure its because the wastegate and MBC are set for higher psi so this is all J-valve controlled.
      Last edited by taverncustoms; 04-07-2013 at 06:43 PM.
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    5. 04-08-2013 10:24 PM #4
      i thought more people would be interested in this.
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    6. Member groggory's Avatar
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      04-08-2013 11:09 PM #5
      lookin good
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      04-08-2013 11:48 PM #6
      Quote Originally Posted by taverncustoms View Post
      i thought more people would be interested in this.
      Its not that they are not but most will do the injectors and tune to get the most out of it. Insta boost is cool but insta boost to double that psi is better. What you did is cool if you blow you ko3 and need a cheap fix over oe unit but people are more interested in pushing things to the limit.

    8. 04-09-2013 01:34 AM #7
      Quote Originally Posted by tomstt View Post
      Its not that they are not but most will do the injectors and tune to get the most out of it. Insta boost is cool but insta boost to double that psi is better. What you did is cool if you blow you ko3 and need a cheap fix over oe unit but people are more interested in pushing things to the limit.
      Yeah this was actually taken on my way to the Unitronic tuner, I thought it would be good for the people that have to piece together the full Frankentubo package. basically a reinsurance that all will be fine, and to go ahead and buy the turbo ahead of time, cause to be honest i wasn't sure how it would run without the supporting mods. But it ran like a top in fact better then the stock k03s. also its a good replacement for a failing turbo and you know you could always save up for the injectors and tune.
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    9. 04-09-2013 01:37 AM #8
      ill have to post a dyno run once i got the MBC dialed in.
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      04-09-2013 10:33 AM #9
      Quote Originally Posted by taverncustoms View Post
      ...I thought it would be good for the people that have to piece together the full Frankentubo package. basically a reinsurance that all will be fine, and to go ahead and buy the turbo ahead of time, cause to be honest i wasn't sure how it would run without the supporting mods. But it ran like a top in fact better then the stock k03s. also its a good replacement for a failing turbo and you know you could always save up for the injectors and tune.
      Granted there's nothing very sexy about running on actuator pressure, but your point is still really valid for a lot of our buyers. Will the F21 work if I don't have a tune or the mods? So I appreciate you posting this up. Because not everybody can afford the mods and tune at the same time as they do a repair.

    11. Member nomomk3's Avatar
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      04-09-2013 10:46 AM #10
      this is appreciated.

    12. Member Mr_Long's Avatar
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      05-02-2013 05:24 PM #11

      the boost jumps rite up to 0.8bar 11-12ish psi and stays there.
      That's Y I hate the K03s because the drop of boost this post also show that FT can be run under any flash you may have and be a + to your ride

      Good info for reference here
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    13. 07-17-2013 04:00 AM #12
      BUMP for good info
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    14. Member jalisco's Avatar
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      02-08-2014 01:09 PM #13
      this turbos are junk I been having 3 already and they keep falling apart **** Doug and his Chinese turbos

    15. 02-08-2014 01:38 PM #14
      Quote Originally Posted by jalisco View Post
      this turbos are junk I been having 3 already and they keep falling apart **** Doug and his Chinese turbos
      Had his turbo in my car with lots of track time... Not one failure...

      Maybe you're running too much boost out of it or not priming the turbo on initial install?

    16. 02-08-2014 01:45 PM #15
      Rofl. I'll bite... Whats happening go them? And what made you post in this topic?
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    17. Member 1.8turbs's Avatar
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      02-08-2014 03:16 PM #16
      I must say- I did the same thing until I got a tune. I actually switched from an APR K04-001 kit to the f21 on stock mode, and the F21 was more fun to drive on stock mode than the k04 -001 at 22psi. Now that I have the tune, it's even worlds better. 👍

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      02-08-2014 05:04 PM #17
      I ❤️ my f21!! Same thing when I was on stage 2 tune it still hauled some ass. The retune and 550cc just made it perfect!

    19. Member teknikALLEN's Avatar
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      05-19-2017 02:02 PM #18
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    20. Junior Member rolanding90's Avatar
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      05-19-2017 09:02 PM #19
      Guys I have a question.. I replace my K03s with an F21 as well, 2004 Jetta 1.8t Awp engine.. I have Eurodyne flash running at 18-21 psi with the stock turbo.. I installed F21 turbo + exhaust Manifold + TIP and turbo is not getting more than 7 psi and I can hear the boost getting out.. No boost leak .. I already did a smoke test .. You can already imagine how mad I'm after installing it and getting these results .. At the beginning I thought it was the wastegate and I closed it and still not boosting more than 7 psi.. I really appreciate your help. Thanks


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    21. 05-20-2017 06:22 AM #20
      Have you upgraded your fuel injectors? You can not run an F-21 on stock injectors at those boost levels. You will not have enough fuel. Ecu might be putting you into limp mode as a result.

    22. Junior Member rolanding90's Avatar
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      05-20-2017 06:17 PM #21
      Ohhh.. I have a 550cc fuel injectors waiting to be installed but not installed yet because I haven't bought the tune..


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