Citroen Activa CT 2.0 / 16valve
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  1. #1
    Tadpole
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    Default Citroen Activa CT 2.0 / 16valve

    Hi all - this is one of those "too much time on my hands" questions. Is the engine block in the 2.0 Activa CT the same as the 2.0 16v? If so, what is likely to happen if one were to put the 16v head on the turbo engine?

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  2. #2
    Tadpole
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    ALL XU10 blocks are the same as the cranck too. But the pistons er a bit different. You will need a new exhaust manifold for the turbo since the 8v and 16v for match. You may want to make a small slot for th 2 extra valve or it might not work. In our club a mamber have done this with a Lynx turbo manifold, GT3076R and Eaton M45. He are running the supercharger on the low revs and after about 3500rpm the turbo take over.
    So yes it will fit.

  3. #3
    Tadpole
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    Thanks - it is just a thought at this stage but I may try it in the future.

  4. #4
    1000+ Posts BIGRR's Avatar
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    Quote Originally Posted by 306Maxi View Post
    ALL XU10 blocks are the same as the cranck too. But the pistons er a bit different. You will need a new exhaust manifold for the turbo since the 8v and 16v for match. You may want to make a small slot for th 2 extra valve or it might not work. In our club a mamber have done this with a Lynx turbo manifold, GT3076R and Eaton M45. He are running the supercharger on the low revs and after about 3500rpm the turbo take over.
    So yes it will fit.
    306Maxi,

    this modification sounds interesting, any more information on this car?
    Present fleet:-
    Peugeot 93' 205 Gti 16v
    Peugeot 73' 504 Ti from new
    Peugeot 08' 407 Hdi Coupe from new

    Previous fleet:-
    Peugeot 95' 605 Sv
    Peugeot 92' 205 Gti
    Renault 72' 16TS from new
    Renault 69' 10
    Renault 71' 10s
    Renault 68' 10 from new

    "Be reasonable do it my way!"


  5. #5
    1000+ Posts PeterT's Avatar
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    You would definitely need to machine four valve pockets in each piston. Otherwise it will crash. Cheaper to start with a 16V engine.......

    '92 205 Mi16
    '90 Mi16x4

  6. #6
    Tadpole
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    Here are some pictures of my friends engine.

    Citroen Activa CT 2.0 / 16valve-ckt406-1.jpgCitroen Activa CT 2.0 / 16valve-ctk406.jpg

  7. #7
    Tadpole
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    I dont have all the info on this engine. But it started with XU10J2TE, then he made pockets for 16valve, then mounted a fully restored xu9J4 D6C syl head. The manifold where not lynx as i stated b4 but DP-engineering one. This didn`t fit since this is a 406 Coupe so a few mod had to be made. A Garrett GT3076 turbo was used, but little too much lag hehehe go figure.. Mega squirt II engine management. The internals are a bit weak så this winter he are replaceing it with forged pistons and conrods. With all this lag he also wanted to test a VW supercharger/turbo set up to make up for the mega lag. When the rpm comes up against 3500rpm the bypass valve opens up and the turbo goes to work. Thats all i know at the moment

  8. #8
    1000+ Posts cam85's Avatar
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    I thought the RS block was shorter than the J4?

    Other than that they are all pretty much the same

    Cam
    94 205 Gti Classic #9
    91 205 Si
    87 205 GTi Race Car
    http://www.aussiefrogs.com/forum/res...-race-car.html

  9. #9
    1000+ Posts PeterT's Avatar
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    Fairly sure they're all the same Cam. The difference being in rod lengths and compression heights.

    '92 205 Mi16
    '90 Mi16x4

  10. #10
    Tadpole
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    You are right PeterT the block are the same for all XU10 cast iron, but on the 8v ther can be a few holes missing. Some have this spray of oil under the pistons to cool them down others dont The crank are also the same on all XU10.

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