Following their very successful line of turbos for the Mini Cooper S, Frankenturbo has designed a new hybrid turbo for the Peugeot/Citroen THP (Prince) Engines.
It is called Frankenturbo F21P and it shares the same core as the F21M from the Mini world. Combined with a newly designed compressor housing, it is a bolt-on replacement for the THP150 and THP175 stock turbo.

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Our test platform was a Peugeot 207 GT 1.6T (THP150). Testing was done using both 95RON and 98RON fuel by BP.

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Importance of testing on a healthy engine

We cannot stress enough the importance of keeping your engine in good health, in order for it to make power safely. These are our very important health check prerequisites that need to be done before any upgrade on THP/Prince engines:

  • New sparkplugs (replaced every 15.000km-20.000km max)
  • Engine timing checked and in place. If the timing chain is loose or any timing part is malfunctioning, it needs to be fixed/replaced before putting strain on the engine. Otherwise there will be major problems long before it makes any power
  • Intake valves cleaned from carbon residues. This ensures proper power generation without knocking or erratic behaviour
  • Boost control valve new or in good shape. Because when the boost control valve goes, all sorts of problems with boost appear
  • Correct engine oil and new oil filter. All of the above systems rely on engine oil to work properly

This list of checkups was followed to the letter before the turbo was installed on the car, specially because the engine was completely stock and already had 147.000km.

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Testing steps while the turbo was in our hands

Tasks during testing the Frankenturbo F21P


Upgrade specifications

  • Completely stock engine, THP150 or THP175
  • Frankenturbo F21P turbocharger
  • 95RON or 98RON, depending on what is available or what the owner wants to use for daily driving.
  • Upgraded intercooler. Do not even bother with the stock unit unless you want to run it with the stock remap.
  • Upgraded exhaust with a sports cat. Keeping things silent, environmentally friendly and street-legal.
  • Stock boost pipes


Performance results

  • Stock ECU map: 153PS
  • Stage 4 ECU remap for 95RON: 260 PS (available via FlasherTHP)
  • Stage 4 ECU remap for 98RON: 280 PS (available via FlasherTHP)

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Our thoughts

Although when we first heard about it we thought it would be another bitchy/twisted little hybrid like most, it proved us wrong. The Frankenturbo F21P is a very well behaved turbo that can be used in two different ways:

  1. Replace the stock turbo as a direct bolt-on replacement. For those who need a new turbo without interest in performance.
  2. Replace the stock turbo for more power. For those who want to increase the power level of their engine.

In the upcoming tests we will be pushing the performance limits from this turbo on the stock engine. To do so we will utilize a cold air intake system, upgraded boost pipes and a water/methanol injection system.


Shoutouts to Frankenturbo for trusting us with their newest and coolest toy. Many thanks to Pavlidis competition for the installation and run-in of the turbo!


  • Ping Hao Sam Posted May 10, 2016 3:30 pm

    Awesome! Can I fit this on my 308CC with 6EAT and get the same power and torque?

  • S Alex Posted May 12, 2016 9:24 pm

    Sam, this turbo was tested on a manual gearbox. We expect automatic gearboxes to have slightly higher losses, so the power will be slightly lower. In theory, it should work.
    It will be very interesting to see a 308 with this kind of power, that is not a THP270

  • Ping Hao Sam Posted May 13, 2016 6:50 am

    Thanks Stelios! I will put my money down for one of these!

  • Cosmin R Posted July 11, 2016 5:35 am

    This is exceptional what you guys manage to do. I recently made an account on your website and try to follow your projects closely. I have a huge request to you. Could you tell me how I can get a an Seat Ibiza Cupra intercooler kit to fit an 207 like the one on this project. I have already found it through a representative J.Deus but I need the bracket kit ( it`s installed on the front impact bar?) silicone hoses and aluminum pipes. I searched on several sites in Greece but I can not manage to finde mode do to language issues. I understand that there are companies that would sell as a kit with everything. Very important. Thank you… Cosmin

  • David Bultreys Posted December 15, 2016 9:48 am

    Do you keep stock injectors and HP fuel pump ?
    Is this turbo big enough for 300 HP ?
    Is the f21p enough cooled to Run it in a rally car ? Usually we heard that all turbochargers with Ball bearings needs to be water cooled to avoid the risk of bearings blocked by overheating.

    I’m building an Engine exactly like this one but with 34mm air restrictor on the compressor, forged pistons, rods, forced air induction and completely free exhaust from the turbine to the rear of the car. (no catalyst or silencer)

    • S Alex Posted January 23, 2017 12:14 am

      The stock injectors and hp pump are big enough to support power levels up to 320hp. Also, the F21P is water cooled just like the stock turbo. I see no reason why it would fail by overheating.

      Since your engine will be with a 34mm restrictor, why not stick to a RC/GTi turbo? It is a much better fit for the job because the restrictor renders the bigger compressor wheel useless. It makes no sense to get a big hybrid that you cannot use.

      • Lombardo Antonio Posted October 29, 2019 3:51 pm

        The injectors and the fuel pump of Opel Astra J OPC are a good upgrade if you want 370-380 HP?

        • Stelios Alexandrakis Posted November 10, 2019 11:57 pm

          Usually they are.

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