Citroen BX 16V Enginetuning !?
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  1. #1
    Tadpole Ferguson's Avatar
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    Default Citroen BX 16V Enginetuning !?

    Hello!

    At first i have to say that i read something about this topic, but now i want to know exactly!
    I also read that the throttle bodies (like Pumaracing wrote) are not usefull for the Australien engine (because of the compression) and its better you put cams like Peterīs ones in.
    I come from Austria (Europe) and my engine has a compression from 9.7:1, can i use the cams from Peter??
    Hope you can help me, because i need more power!

    PS: Sorry for my bad english!

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    Greetings!

  2. #2
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by Ferguson
    Hello!

    At first i have to say that i read something about this topic, but now i want to know exactly!
    I also read that the throttle bodies (like Pumaracing wrote) are not usefull for the Australien engine (because of the compression) and its better you put cams like Peterīs ones in.
    I come from Austria (Europe) and my engine has a compression from 9.7:1, can i use the cams from Peter??
    Hope you can help me, because i need more power!

    PS: Sorry for my bad english!

    Greetings!
    There's nothing wrong with putting TB's on the lower compression engine. It will still show a similar improvement. It's just that the autorities don't like that sort of thing in Australia.

    The compression controls the amount of cam timing you can use.

    I'd do both if you can!

    '92 205 Mi16
    '90 Mi16x4

  3. #3
    Member senthil16V's Avatar
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    Hi Peter,

    Just want to know whether you have a website dealing with Citroen/Peugeot performanace parts? I would like to get the cams for my ZX 16V at well!

    With Rgds,

    Senthil16V

  4. #4
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by senthil16V
    Hi Peter,

    Just want to know whether you have a website dealing with Citroen/Peugeot performanace parts? I would like to get the cams for my ZX 16V at well!

    I do have a website under development, but it's not active. Hopefully in the next couple of months. I offer two regrinds for the XU series 16V. One is a smooth idle, stage I cam. The other is sporty Stage II cam, which has a lopey idle, and makes up to around 220hp with the right goodies. The std. exhaust cam can be used with both grinds.

    '92 205 Mi16
    '90 Mi16x4

  5. #5
    Tadpole Ferguson's Avatar
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    Ok, thanks for the answer.
    Which compression have australien Mi16 engines, same like mine?
    So, PeterT, would you send the cams to austria?

  6. #6
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by Ferguson
    Ok, thanks for the answer.
    Which compression have australien Mi16 engines, same like mine?
    So, PeterT, would you send the cams to austria?
    Australian delivered Mi16 and BX16V have the XUJ9J4Z engine, 9.5:1. No problems sending a cam to Austria. You'd have to send me your cam first. Postage is approx. AUD$60.

    '92 205 Mi16
    '90 Mi16x4

  7. #7
    1000+ Posts Ken W's Avatar
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    Default 16V Specs and Compression Tests

    Peter,

    The Cit BX 16V seems to be quoted at 10.4 to 1 compression in the Australian Specs although its power figure is 108kW the same as the Mi16.

    The torque figures are strange. The BX 16V is quoted at 163Nm which is less than the quoted figure of 174Nm for the Mi16 with 9.5 to 1 compression ratio.

    Can anyone explain the more stated compression and less torque for the BX?

    Also, how many PSI would you expect to measure during a compression test on a good 16V engine with either compression ratio?

    Ken W

  8. #8
    1000+ Posts PeterT's Avatar
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    The BX16V engines are definitely identical, except for the exhaust cam. I haven't measured one yet, but it's definitely a different casting.

    Cranking pressure is approx. 190 and 210 respectively for fresh engines.

    '92 205 Mi16
    '90 Mi16x4

  9. #9
    Tadpole Ferguson's Avatar
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    Hmm, 9,5:1 in Australia and 9,7:1(166Nm) in Austria?
    although they have different compressions, can i use nevertheless your cam?
    In austria the 148hp and 160hp version have different pulleys, also in australia?

  10. #10
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by Ferguson
    Hmm, 9,5:1 in Australia and 9,7:1(166Nm) in Austria?
    although they have different compressions, can i use nevertheless your cam?
    In austria the 148hp and 160hp version have different pulleys, also in australia?
    I've seen the XU9J4Z quoted as both 9.7 and 9.5 in different literature. However, it's the same donk and actually measures 9.6:1. The XU9J4Z has the #3 inlet pulley, which is required for my Stage 1 cam.

    '92 205 Mi16
    '90 Mi16x4

  11. #11
    Tadpole Ferguson's Avatar
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    What do you mean with #3 inlet pulley?

  12. #12
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by Ferguson
    What do you mean with #3 inlet pulley?
    The inlet and exhaust pulleys have a number stamped on them, which identifies advance/retard.

    ie
    XU9J4
    inlet - #2
    exhaust - #2

    XU9J4Z
    inlet - #3
    exhaust - #2

    #3 advances the inlet cam 1.5 deg. (or 3 crank degress), compared to a #2.

    '92 205 Mi16
    '90 Mi16x4

  13. #13
    Tadpole Ferguson's Avatar
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    I see, thanks.
    I read something about this, it seems that austria and australian have the same #3 inlet pulley, but i will exam.
    I read in a post that your inlet cam increase the power approx 15% ?
    Which performance upgrades can i expect, somebody tested before/after HP or q-mile?

  14. #14
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by Ferguson
    Which performance upgrades can i expect, somebody tested before/after HP or q-mile?
    Here's before and after figures (kW at the wheel) on a freshly rebuilt XU9J4Z. Disregard the 60 km/h figure.

    http://www.users.bigpond.net.au/tayl...cam_change.htm

    '92 205 Mi16
    '90 Mi16x4

  15. #15
    Tadpole Ferguson's Avatar
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    Ok, thanks for the answers.
    I hope i wasnīt too annoyingly with my questions.
    I hope i will find time in the next months to remove my inlet cam, because there are many things to do at the car.

    Thanks!
    Last edited by Ferguson; 17th August 2004 at 09:59 AM.

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