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Thread: mk2 rally car

  1. #21
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    New camshaft has been mounted.
    Car went to technical control for rally yesterday, looking to make an appointment for rolling road right now.

    Some pics:


















    Last edited by _Brian; 24-03-19 at 07:36 PM.

  2. #22
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  3. #23
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    Engine was already delivering 132hp without being completly mapped.

    Untill engine started rattling atleast

    Valve rocker got thrown away .. anyone ever had this before? Nothing broken it was just laying next to the valve ..

  4. #24
    North Events Co-ordinator Moderator boffer8's Avatar
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    Yes, it happens with highlift cams if the geometry of the valve train has not been adjusted by machining the cam carrier...
    If Carlsberg did Motor clubs, then IDMC would probably be the best motor club in the world.


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    Quote Originally Posted by boffer8 View Post
    Yes, it happens with highlift cams if the geometry of the valve train has not been adjusted by machining the cam carrier...
    .could you explain further? Dont quite understand ..

  6. #26
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    The base diameter is smaller, otherwise it is not possible to make higher lift than 11,67mm on this engines. The other reason with small cams, that it was regrinder from oem cam.
    What cam do you have? Measure the small diameter on your cam, measure the oem cam too, OEM-Tuning devided by 2 and you have the number how much must be grinded from the cam housing, that the cam will be closer to the rockers.

  7. #27
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    Quote Originally Posted by _Tomiboy View Post
    The base diameter is smaller, otherwise it is not possible to make higher lift than 11,67mm on this engines. The other reason with small cams, that it was regrinder from oem cam.
    What cam do you have? Measure the small diameter on your cam, measure the oem cam too, OEM-Tuning devided by 2 and you have the number how much must be grinded from the cam housing, that the cam will be closer to the rockers.
    Enem a2 camshaft has base diameter 24mm (std 25.5mm) but I use the enem spring kit with thicker valve top hats 3.2mm to compensate.
    So I schould be fine I think?

  8. #28
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    And is it fine?
    With competition high lift cams at the 8v heads you must always use special cam spring washers and machine out under the washer otherwise you can not reach the 34mm fitted spring height.
    It can be that enem compensate at the top hats, but I prefer to regular way what all the others are doing.
    If you are fine with your setup why have you asked?

  9. #29
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    So it ìs safe to macine 4mm from under the valve washers?

  10. #30
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    problem was a seized exhaust valve

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