Close

    • Litchfield Porsche 992 Carrera and Carrera S/4S Stage 1 ECU tune results - 575 horsepower

      A little confusion here as some sites are making headlines that the 992 Carrera is hitting 575 horsepower tune only. That is false. Litchfield showed the car on the dyno but did not post a dynograph for a base Carrera at this output level.


      What they posted was the 992 Carrera C4S model which has much larger turbochargers showing 582 crank horsepower on the MAHA dyno:


      This chart below created confusion:


      The 992 Carrera and 992 Carrera S do not have the same horsepower and torque when tuned. This should be obvious to anyone who knows the cars as the turbos are different sizes.

      With the 992 generation, the difference between the turbo wheels is larger than it was with the 991.2 generation meaning the space between them when tuned will be even greater.

      Porsche even mentioned reducing the 992 Carrera turbo size.

      Sites such as Motor1 simply got this wrong and didn't look at the graph.

      This article was originally published in forum thread: Litchfield Porsche 992 Carrera and Carrera S/4S Stage 1 ECU tune results - 575 horsepower started by Sticky View original post
      Comments 7 Comments
      1. nbrigdan's Avatar
        nbrigdan -
        991.1 turbo move over...
      1. Bowser330's Avatar
        Bowser330 -
        Manual Transmission? I didn’t think the manual 992s were out yet.....
      1. F16HTON's Avatar
        F16HTON -
        @Sticky. Did you reach out to Lichtfield? They are a pretty reputable company.
      1. nn7man's Avatar
        nn7man -
        I know Iain. They purchased a 992S as a development car and the results are as published. I think they just messed up with their site, there are no customer base 992 cars in the UK yet, let alone any tuned ones.
      1. quattr0's Avatar
        quattr0 -
        Click here to enlarge Originally Posted by F16HTON Click here to enlarge
        @Sticky. Did you reach out to Lichtfield? They are a pretty reputable company.
        Thank you for your email and interest in our Porsche tuning.

        In Europe it would appear than the engine is the same in both the Carrera S and the base Carrera.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by F16HTON Click here to enlarge
        @Sticky. Did you reach out to Lichtfield? They are a pretty reputable company.
        Motor1 did:

        Update:A previous version of this story indicated that Litchfield had tuned both a base 911 Carrera and a 911 Carrera 4S to produce 572 horsepower and 480 pound-feet of torque. However, the site Porsche Boost emailed indicating that this likely isn't the case since the base 911's turbine and compressor wheels are significantly smaller and its boost pressure is lower than the C4S'. Considering that, it would be unlikely that a single tune could net the same output from both engines..

        We emailed Litchfield for clarification. Here is the response from company director Iain Litchfield:

        "Thanks for the email and interest in our 992 tuning work.

        The development car we used was a Carrera 4S but all the information we could find (mainly through the UK press) was that the European base Carrera would receive the same engine but in de-tuned form because of the latest emissions. The Porsche press release I saw here made no mention of small turbos but I’m more than happy to correct it if I’m wrong. Either way it’s an amazing engine.
        Regards

        Iain Litchfield"
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by quattr0 Click here to enlarge
        Thank you for your email and interest in our Porsche tuning.

        In Europe it would appear than the engine is the same in both the Carrera S and the base Carrera.
        I don't know why they think that. Also, they should just get a Carrera development car before posting numbers for it without knowing the output.