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Thread: Wondering if anyone has gone Hi Comp with Stock Cams? 1200

  1. #1
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    Wondering if anyone has gone Hi Comp with Stock Cams? 1200

    Just wondering if anyone has gone Hi Comp with stock cams on a 1200?

    I'm was just thinking about going hi comp, stock cams, cv40's & brocks alien head.

    Just wondering what kind of power I could expect....?

    I had considered zzr12 cams but they're rare as fk and I want to keep the power down a bit lower if that makes sense.

  2. #2
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    Re: Wondering if anyone has gone Hi Comp with Stock Cams? 1200

    Do a search on the zrxoa board, quite a lot of stuff over there about

    tuning 1200's.

    Does seem a lot of work though if you are not gonna change out the cams.

    mp
    Hcw's , still going strong

  3. #3
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    Re: Wondering if anyone has gone Hi Comp with Stock Cams? 1200

    By high comp do you mean changing the pistons or cyl head skimming?
    Se si muove, sorpassilo. Se non, lucidilo.

  4. #4
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    Re: Wondering if anyone has gone Hi Comp with Stock Cams? 1200

    mp I'll have a look. It would be so convenient to throw some cams in at the same time, but I'd prefer cams with a similar effect to the gpz on the 11. Maybe I'm concerned about how the cams will change the power delivery.

    phoenix I would prefer to just throw some JE pistons in than skimming. On a side note my S is not going to be a S anymore.

  5. #5
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    Re: Wondering if anyone has gone Hi Comp with Stock Cams? 1200

    What is a Brocks Alien head ?

    Deffo get the head ported whilst off,whatever.

    mp
    Hcw's , still going strong

  6. #6
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    Re: Wondering if anyone has gone Hi Comp with Stock Cams? 1200

    Deffo get the head ported whilst off,whatever.


    Valve unshrouding as well, mixed opinions on this as it does lower the comp ratio slightly. Seems to work well on mine but can't confirm with a dyno run 'till i've put a new clutch in.
    Se si muove, sorpassilo. Se non, lucidilo.

  7. #7
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    Re: Wondering if anyone has gone Hi Comp with Stock Cams? 1200

    Brocks Alien Head http://www.brocksperformance.com/Ali...5149+C207.aspx I'm not completely sold on it now though as I'm sure I'll lose some torque due to the short straight through style. Too bad I already have it here lol. I also have a set of Akrapovic SP Titanium slip ons off my zx14 that I could mod to use the brocks headers...

    I'm hoping I can get a family member to do any porting etc on the cheap.

    I've been reading about stock cam hi comp on the oa and it seems that it can be done, however there have been issues with detonation. Anyway I'll keep reading and eventually get there.

  8. #8

    Re: Wondering if anyone has gone Hi Comp with Stock Cams? 1200

    Stock cams don't work too well with high compression pistons/head on the ZRX1200 .
    Something to do with cam timing overlap which increases the chance of knocking...Kwick knows more about it than me.
    Brocks are not too clever at low revs either....not sure about the alien head though.

    If you're going HC, get the ZZR cams too as MP says.
    You'll still have more torque at any revs compared to a standard engine, plus a massive top end.

    If you only want oceans of low reving torque with no top end, buy a Harley

  9. #9
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    Re: Wondering if anyone has gone Hi Comp with Stock Cams? 1200

    Personally think it would be pointless to do all that and not cam it....

    You can get a decent enough tune out of stock ZZR 1200 lump with more to come if you decide to get it breathed on, might just be worth keeping any eye open from an entire lump from a breakers just in case - 12 cams are rare.

  10. #10
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    Re: Wondering if anyone has gone Hi Comp with Stock Cams? 1200

    Purge I've gathered that about the overlap, but Teddy also had good experiences.
    Having said that these days I definetly prefer to err on the side of caution.
    With the Brocks I reckon the headers are pretty good but the Alien head is like a short (14") oval megaphone probably good for drags with a 1224, luckily the muffler fits other models so shouldn't be too hard to offload.
    What do you think about modding a pair of these to suit the Brocks headers?


    PALESAINT it does appear that way, what about a custom grind has anyone done that?
    And I have been keeping my eye open for one, there is one available but it is an import with no guarantees or anything, guy says he doesn't know the km, he seems really dodgy and is a real prick.

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