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  1. #6321
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    you have to alter the map properly to see the real advantage of the race fuel.
    The gains you saw are almost nothing,probably due to not good altered map.

  2. #6322
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    I think most powerful fuel for R5 now is ETS. Some other are quite close, some other are not much better than 102 pump fuel (but are more stable). If I remember correct difference between Pb98 and proper race fuel was some 7% in case of R5

  3. #6323
    Senior Member Mirek's Avatar
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    Quote Originally Posted by TheFlyingTuga View Post
    You need diferent maps for diferent fuels (street to race and vice-versa) But same parameters as before. The combustion is better with Race fuel and a lot cleaner, there's where you got the gains.
    I have very old (13 years old) dyno measurements from an Evo IX with 100 octane stock fuel (from that time) and 102 octane race fuel, both with the old 32 mm restrictor (gr.N rules from that time). The dyno is from one of the most well known tuners from here who at that time was also doing rallies himself. The graphs give 255 Hp/489 Nm for 100 octane stock fuel and 278 Hp/565 Nm for 102 octane race fuel. Also the torque peak for the race fuel is roughly 200 rpm lower and the power band is a bit wider.
    Stupid is as stupid does. Forrest Gump

  4. Likes: Sulland (18th November 2020)
  5. #6324
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    Quote Originally Posted by Mirek View Post
    I have very old (13 years old) dyno measurements from an Evo IX with 100 octane stock fuel (from that time) and 102 octane race fuel, both with the old 32 mm restrictor (gr.N rules from that time). The dyno is from one of the most well known tuners from here who at that time was also doing rallies himself. The graphs give 255 Hp/489 Nm for 100 octane stock fuel and 278 Hp/565 Nm for 102 octane race fuel. Also the torque peak for the race fuel is roughly 200 rpm lower and the power band is a bit wider.
    thats the right gains you can see if you maximize the benefits of a good race fuel

  6. #6325
    Senior Member Sulland's Avatar
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    How much fuel does a R5 drink per 10km SS, and on normal transport stages?

    Will the cleaner racefuel also make the engine last longer?

    The R5 engines seems to be very durable, it is nor very often you see engines breakedown on these cars, and that is impressive!

  7. #6326
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    Average fuel cons of R5 is around 55l per 100km on stage (depends on car, conditions, surface, driver, etc) and 10-20l per 100km on road section (mainly depends on driver and road type).
    Better fuel maybe is not influencing engine life, but with Pb98 for example sensors like EGT or lambda live much shorter than on race fuel.
    Yes, they are reliable, one of main factors is low boost they're running with.

  8. Likes: Sulland (18th November 2020)
  9. #6327
    Senior Member Fast Eddie WRC's Avatar
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    Quote Originally Posted by Mirek View Post
    350 bhp is impossible for R5 and a complete nonsense. Period.
    As an proper R5 car yes, but cant such a car be used under other regulations and use a different state of tune (restrictor) to produce more power ?

    There were cars running in the BTRDA championship in the UK using Fiesta R5+ cars with more power than a homologated R5.

    Mellors could be suggesting the same could be done to their Iriz.
    Last edited by Fast Eddie WRC; 18th November 2020 at 12:13.

  10. #6328
    Senior Member Mirek's Avatar
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    Quote Originally Posted by Fast Eddie WRC View Post
    As an proper R5 car yes, but cant such a car be used under other regulations and use a different state of tune (restrictor) to produce more power ?

    There were cars running in the BTRDA championship in the UK using Fiesta R5+ cars with more power than a homologated R5.

    Mellors could be suggesting the same could be done to their Iriz.
    I already answered that.
    Stupid is as stupid does. Forrest Gump

  11. #6329
    Senior Member Sulland's Avatar
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    Mr Prokop was out testing 4 different R5s the other day. Any reports from him after the tests, on what car he thought suited him best, and why?

    Will he be taking the C3 for a test as well, or has that one been counted out?
    Last edited by Sulland; 19th November 2020 at 14:40.

  12. #6330
    Member Tom K's Avatar
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    It is always difficult to judge from drivers' words, but after Fabia/Polo/i20 test I would say he was* most happy with Polo, but the next day he seems to be even more happy with Fiesta After first trio he told also that still 2 manus left, so maybe C3 is also in the game.

    *My opinion is based on his film-review published on Facebook.
    Last edited by Tom K; 19th November 2020 at 15:02.

  13. Likes: AnttiL (19th November 2020),Jarek Z (19th November 2020),pantealex (20th November 2020),Sulland (19th November 2020),wyler (19th November 2020)

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