Prodrive Impreza 555 Group A General Discussion

Discussion in 'Prodrive Impreza 555 Group A' started by Burnsie, May 8, 2018.

  1. LoveNWlife555

    LoveNWlife555 Type RA Member

    This thread is gold. I’m now going to get nothing done at work tomorrow. I did have a question, that someone on here may know.

    Curious on how they got the old GrA cars to have that very lumpy idle. I’ve heard plenty of Subaru’s with cams and it’s just not the same. Something to do with the style of ALS they ran back in the day maybe?
  2. PeteRA

    PeteRA love everything GC8

    @LoveNWlife555 , it’ll be the anti lag, I have it on my RA and as soon as I switch it on it ups the Revs and the whole noise sounds completely different. I’m also hazarding a guess it was on full time with the old GRP A cars hence the noise is constant
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  3. LoveNWlife555

    LoveNWlife555 Type RA Member

    Thanks! I actually just found it searching. It’s called rotational idle. Helps keep temps down with the ALS. Dumps fuel to cool and also cuts ignition to cylinders in a certain sequence.
  4. James Lowry

    James Lowry V-Limited Member

    Also called cyclic idle. I have it on my RA with the Link G4+ when Anti-lag is switched on.
  5. GPA555

    GPA555 Type RA Member

    Northern Ireland
    GpA cars noise comes from a lot of various things such as compression of the engine, the anti lag, restrictor on the turbo for 1995 it was 34mm for GpA. Cars also had throttle jacker.

    The anti lag switch in the GpA car is labelled ISC and is used on stage.
    The cars ECU will have a default of rotational idle/cyclic idle without anti lag switched on.
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  6. asperformance

    asperformance Site Supporter

    oop north
    In general its mainly the throttle jacker that causes the intermittent noise - does the same sort of thing on an EVO also.....
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  7. Etheridge-Bird

    Etheridge-Bird Moderator

    I am not sure if posted before? If so, apologies.

    Rallye Azur d'Antibes 1998

    Rallye Le Touquet - Pas de Calais 1998

    12 h de la ville de Sainte-Marie 1997

    1995 French rally championship - Cevenole
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  8. hct

    hct 1995 WRX RA STI

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  9. tbtstt

    tbtstt Type RA Member

    Been trying to find more technical information on R555 FEL for several years, but never had any luck. I understood that the car was the "ultimate" Group A car (with some WRCar bits on it), but never have been able to find out exactly what specification the car was.

    I can't see this posted in here and I think it is the best Group A (and early WRCar) video...

    ...I discovered that one of the APV team was selling DVD's again a year ago and bought one: 10 Euros well spent!
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  10. Burnsie

    Burnsie V-Limited Member

    North west
    Hi @tbtstt thanks for sharing the awesome video I think some of the other videos on here are made up of clips from this so nice to find a full length video :thumb

    R555FEL was indeed a special build for the late great Bertie Fisher, the only built in RHD at the time. As far as I have been told by an ex Prodrive Technician it was built in RHD and Irish tarmac spec as that’s all he could run as the Irish Championship ran under homologated rules.

    I don’t know what the exact specification was but I’m guessing it had some of the new WRC and maybe works technology that didn’t make it into some of the customer cars. Perhaps it had the latest ECU software and gearbox updates for example?

    Looking at the rebuild photos of it when it was at BMA getting rebuilt for Stephane Chambon there doesn’t look to be anything really obvious.[email protected]/albums/72157641861206205/page2

    I believe the other customer cars were ex works shells that did one Rally, had a new floor put in, repainted, built up and sold. You can imagine what such a car must have cost Bertie back in the day :eek:

    Photo of magazine advert kindly sent to me by Allister Cathers which I posted on IG a while ago ;)
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