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Stealth cam

Discussion in 'VF Holden Commodore (2013 - 2017)' started by Clay1391, Jan 4, 2020.

  1. Clay1391

    Clay1391 Active Member

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    GM motor sport have the cam package on sale, for a cam in an L77 it going to cost $4100 that includes dod delete, not sure on how much extra the heads are to be done.

    I will NOT be doing any boost in the seeable future.
    Is it worth doing the heads to get a little extra power?

    How much more fuel would a stealth cam use? Its a very small cam but worth knowing as ive heard people say don't get a cam due to the increase cost of fuel.

    How much louder is the car with the cam? Currently have full 3inch with rex headers and cats and mild steel catback xforce.

    Might make the drive to GM motor sport today and see it all for myself. 2hour drive from were I live.

    Thanks,
    PS. if you mention another make of car in this post, save yourself the hassle and get off the JUST COMMODORE forums.
     
  2. Hq King

    Hq King Member

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    What's the specs of the cam
     
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  3. panhead

    panhead Well-Known Member

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    What's a stealth cam?

    From reading GM Motorsport's website a stealth cam for an L77 is as follows:

    Stealth - Duration 223/235 @.050 - Lobe Sep 115 +Adv. - Valve Lift INT 0.610 - EXT 0.620


    This is the specs for a stock cam for an L77:

    Duration 196/208 @.050 - lobe separation 116 - lift 0.478/0.466



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    Last edited: Jan 4, 2020
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  4. panhead

    panhead Well-Known Member

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    Good head work is not cheap.

    The stock heads flow okay and any work on them for the package you're looking at would be a total waste of money.






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  5. dimetime

    dimetime Active Member

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    Where about do you live to have to travel to Melton? There are plenty of good shops around.
     
  6. 07GTS

    07GTS Well-Known Member

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    with that cam u should get close to factory fuel usage just depends how good the dod was as sometimes its not worth using, cruising should be around the 7-9L/100 on the instant display, but anytime ur on the throttle u will use more as the engine will be ingesting more and make sure tuner keeps DFCO active
     
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  7. Clay1391

    Clay1391 Active Member

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    There doing the "special"

    They delete the dod, don't think it's optional to keep it once they cam it.
    Is the DCFO where they tune it and make it from low lumpy to high lumpy? Don't understand much about all this, but I'm under the impression it's the tune that makes it lumpy not so much the cam.
     
  8. panhead

    panhead Well-Known Member

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    I'm sure 07GTS can give you far better info than me but it controls the fuel usage on deceleration.

    Leaving it active will slightly reduce fuel usage and quieten the popping noise often referred to as overrun and as far as I know the parameters can be changed to control how much fuel is escaping on deceleration.

    That's my basic knowledge from what I think I remember my tuner telling me when he asked if I wanted it or not.

    Personally I like all the drama of the overrun but saving fuel has never been a priority for me.

    The lobe separation has a lot to do with the lumpiness of the cam with a high number smoother than a low number and from what I understand a good tuner can control that to some extent as well.



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  9. MrBags

    MrBags Active Member

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    Wish I could get instant fuel display in my VE for sh1ts and giggles!!
     
  10. abuch47

    abuch47 Active Member

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    from memory the Ve/vf tools out at 39.9L/p100km which which it sits at while more than half pedal.
     
  11. Clay1391

    Clay1391 Active Member

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    So turning it off will make more popping noises, think Il turn it off.
     
  12. 07GTS

    07GTS Well-Known Member

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    deceleration fuel cut off so when u decelerate it turns into an air pump turning it off will increase crackle as the dumped fuel will ignite in exhaust, the lumpiness of a cam is dependant on the cam at idle and the tune can be altered to more correction error to give an affect of more lope, the lope is decided by overlap and intake valve closing point as the later it closes the more air gets pushed back in the manifold causing disruption and less cylinder fill and the other events play a roll also
     
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  13. Clay1391

    Clay1391 Active Member

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    Is it possible to get flames from that? And deleted cats would more likely of flames?
     
  14. 07GTS

    07GTS Well-Known Member

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    anything is posable but would take a bit of fuel prob better with ethanol or meth as fuel ratio is so much more and shorter pipes no cats massive cam
     
  15. panhead

    panhead Well-Known Member

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    There goes your stealth and rego





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  16. Clay1391

    Clay1391 Active Member

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  17. panhead

    panhead Well-Known Member

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    Not just in your street, lock up your daughters as you'll hear that monster a mile away. :)





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  18. Daniel Souza

    Daniel Souza Active Member

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    I think in order to keep the DOD
    A custom grind cam is needed.

    I just posted about that here
    https://forums.justcommodores.com.au/threads/vf-series-1-ss-turbo.279935/page-3#post-3063789
     
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  19. Milo 6.0

    Milo 6.0 Active Member

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    You dont need a custom grind to keep afm,crow cams do 1 afm cam,comp do a few off the shelf afm cams,i looked all the options when doing my cam,crow quote up to 15% power increase with their dod cam,im guessing power at the motor.
    They are not done often so the range of off the shelf cams is limited.
    I fitted a small crow cam 871202 and got 42hp at the tyres,could have got alot more,maybe double the hp with a larger cam but streetability would be affected and also a decent stall would be needed,also making it less streetable.
     
    Last edited: Jan 4, 2020
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  20. Daniel Souza

    Daniel Souza Active Member

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    Thanks for clarifying
     
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