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Thread: French GC8 (slow) project

  1. #21
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    Quote Originally Posted by Chartreux View Post
    I'm very happy to hear this. I still hesitate between SC42 and SC46 to be honnest. I know that SC42 will be more responsive, but SC46 can be pushed in the range of 450+ with right fuel. As I plan to upgrade my new heads (AVCS big port) to have rev at 8k+... still unsure about turbo choice.
    I don't want to go rotated for the moment.
    I'm sure SC42 able to puch 450+ with E85 !
    22B french dreamer

  2. #22
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    Hi,

    Some news about engine.

    Here is what I received from Enginetuner




    Spec as follow :
    EJ20 CDB with oil squitters
    Mahle pistons (92.5mm)
    K1 rods
    79mm STI crankshaft
    Rear end thrust bearing
    AVCS Big port heads
    Stock camshaft
    +1mm cosworth exhaust valve
    mild head porting
    ARP Head Studs
    Cosworth head gasket

    Test fit


    CDF parallel fuel rails


    Question : what does it miss on this picture ?


    ...to be continued

  3. #23
    Super Moderator MAD Hammer's Avatar
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    They do make a tidy job of things at enginetuner.
    Key sponsors - Stella Motorsport/SD Motorsport/Area 52 Autosport/AS Performance/REIS.co.uk

  4. #24
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    Yes, I'm very satisfied with the quality of job, Alan is really nice guy and I hope that the result will be great. I'm looking forward !

  5. #25
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    Some new updates (pictures will be added soon)

    I collected Syvecs S6 PnP thanks to Jura.

    Based on the epic topic about twin scroll turbos, lots of readings and discussions with Simon @ chevron, and when I saw results, I think it will closer to the result I'm looking for. I want good response/drivability instead of chasing big numbers.

    So I've decided to change plan a little bit and go to Twin Scroll route with Chevron TMIC and Chevron/owen turbo with WRC bearings.

    ... to be continued

  6. #26
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    Small update since loooong months

    I've decided to stick with the Lateral performance IC Rad combo for the moment :




    The Syvecs S6 PnP ECU


    Phenolic spacers from GB on this forum (thanks Jaimie). Very good quality parts.


    DW 750cc Injectors


    Turbosmart 3 port boost solenoid


    OEM Twin Scroll Header and Up Pipe


    Oil pump 12mm (OEM)



    ....to be continued

    I've talked to Simon @ Chevron, and he told me that the TS Turbo with WRC bearings was difficult to map (at least different), so he recommand me some mapers, but I'd like to know if someone know how to map it correctly to get the best results ?

  7. #27
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    Hi mate engine looks sweet why did you go for a 2.0 instead of a 2.1 ? Reason why is I have a ET 2.0 cossie forged I was trying to sell but have now decided to use with big port spec c heads what power do you think you will get from it. Great build by the way I will be watching this :-)

  8. #28
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    French GC8 (slow) project

    Hi mate,

    I've gone to the 2,1l route (92,5mm x 79mm).

    I don't have figures in my mind, I don't want to beat numbers on the dyno.
    I would be pleased if I can have good balance between response, spool and lag, in the same spirit as johnfelstead's STI. A perfect road car able to be a real threat on the track.
    Power between 400 and 450 would be great for me on a wide range of RPM.
    ;-)

  9. #29
    Senior Member JAMIE - TYPERV6's Avatar
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    Very impressive Thierry. Delighted you were happy with Thermal Spacers.
    97/98 S5 WRC Project Build... 5 years and counting!

    http://theproject.ie/

  10. #30
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    French GC8 (slow) project

    Some updates of my built.
    I found a rare LHD prodrive quick steering rack from a Groupe N.
    Now it's no more 3,2 turn, but 2,2 turn !!
    I just finished the swap, I didn't really made road test for the moment, tomorrow I'll make alignment and then test !!
    But seems a loooooot quicker




    I've changed tie rods and boots too
    Can't wait for test drive !!

  11. #31
    22B Junkie
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    I need a lift to Courchevel on Sunday so if you can make sure it's ready for then that would be good

    ---john---
    I'm Dyslexic, if you don't like my spelling, go FCUK yourself

  12. #32
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    French GC8 (slow) project

    You will enjoy skiing, there is a lot of snow ! It's subby time !!

    We can see it's clearly shorter
    Before
    https://vimeo.com/118986694

    After
    https://vimeo.com/118986725

    Alignment done today. I'm very happy with this quick steering rack, it's worth for the money !!!

    John, lift is ready 😉
    Last edited by Chartreux; 24th April 2016 at 18:21.

  13. #33
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    there was no snow there when I was there on jan 4-13 half of mirabel slopes were full of grass and ice

  14. #34
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    2016 update

    It's a long time I didn't updated this thread.

    The main news are the following parts arrived :

    Bilstein PSS9 + STI GrN top mounts (not pictured)


    New 5x100 front knucles with spacers (legacy 2010)


    Bosch 044


    Injector Dynamics 1000cc


    Turbo finally here, and direct from Simon @ Chevron (big thanks to him)
    Made magic, with this VF36 exhaust housing :


    Transformed into this (who will see what it miss on the cold side housing ???) :





    Inlet Hose

  15. #35
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    no nipple for boost solenoid?

    btw, what are the turbo specs?

  16. #36
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    French GC8 (slow) project

    Turbo is more or less the same than John Felstead

    Here are some more pictures compared to standard VF36



    https://vimeo.com/163977046

  17. #37
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    12mm oil pump in :



    SKF Water pump fitted


    Syvecs ECU in the case


    OEM Downpipe commparison. Twin Scroll Downpipe vs Single scroll Downpipe. The OEM Twin Scroll Downpipe will be used for emission test... surprisingly, the both downpipe seems to be the same length



    FPR Test fit


    Mocal Sandwich Plate

  18. #38
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    Some update since 4 years now !!!

    Finally my clutch decided to pass away so I was decided to remove the engine to change it and replace the motor by the new one. I spent around 1 year finishing to built the engine harness, buying stupid things such as bolts, connectors and various adaptation plates. I custom made some parts also, and now it runs !

    Finally the engine is in :




    The beast is out


    Some power after remap, not E85 yet


    Nagisa Fender Brace (very happy with the feeling)
    Last edited by Chartreux; 3rd February 2020 at 13:15.

  19. #39
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    Nice work
    Jan

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