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Exhaust mods for Motorsport, possibly Director & Magnum

Discussion in 'VF Holden Commodore (2013 - 2017)' started by duaned, Oct 27, 2017.

  1. monstar

    monstar Naturally as-pirated

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    I think the HSV headers will fit, I can’t easily see which component would foul the manifold?
    It seems manifolds with Cyl 1 and maybe 3 tucked inside the engine mount, or 4-1 cluster near oil bypass port would have issue.
    No reason HSV won’t clear?
     
  2. MY17DIR

    MY17DIR Active Member

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    Damn, thats disappointing. Got my HSV headers and mid section ready to fit soonish to our director, but really don't want to removed oem oil cooler as i wanted to keep it as stock (looking) as i could, hence why i bought the HSV stuff....
     
  3. daves8

    daves8 Active Member

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    Long tube 4-1s like difillipo and hurricane sound the best in my opinion anyway.....
     
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  4. duaned

    duaned Active Member

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    So why dont they fit them to the LSA's? Genie Tri-y's wont fit and the HSV's are even tighter to the motor.
     
  5. monstar

    monstar Naturally as-pirated

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    But they are the most susceptible to hit?!
     
  6. monstar

    monstar Naturally as-pirated

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    Incorrect design spec for supercharged engine.
    No, HSVs are no closer than stock, per same routing and cat entry.
    3E253C71-0166-4AB8-9A0B-1815357B615A.jpeg
    Above is location of pokey HX, basically between engine and engine mount.
    5B0CEDDB-2710-49EE-84CF-9226EA787429.jpeg
    Above is looking through engine mount bracket to location of pokey HX.
    206FFE29-BF6B-426A-A140-604A0A7535E2.jpeg
    Above is looking down cylinder 1 pipe, which runs outside the engine mount.
    74E98E0F-E4E8-4B7C-A7C0-8600DD9E88A6.jpeg
    Basically part 7 moves part 9 about 5 cm further forward than oil filter location. The only header design that would foul part 9 are certain long tube 4-1 headers that run cylinder 1 on the inside bottom position.
     
  7. lmoengnr

    lmoengnr Well-Known Member

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    If I get a chance, I'll put the Magnum up on ramps and have a look around underneath.
    I have a pair of HSV headers and cats, I'll see if its possible to fit them.
    I want to check the hangers on the mid section, to see if they're similar to a VE ute, as I have a 2.5" Maloo mid section I'm keen to try.
     
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  8. 426Cuda

    426Cuda SUBLIME!

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    Same.
     
  9. 426Cuda

    426Cuda SUBLIME!

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    I hope you're right Monstar. I'm very keen to stick with the HSV headers. But, still planning on a tune anyway.
     
  10. 426Cuda

    426Cuda SUBLIME!

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    It's not that I don't like them Duanne. Just that for my car, application, I want to stick with tri-y and ideally HSV. I meant I should have said not in favour of fitting them to my MSE.
    Some long tubes can have clearance issues too. I've never used 4-1's on an LS. Only on old school car by 8's. But I always thought they were better up top than bottom end torque?
     
  11. panhead

    panhead Well-Known Member

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    With a good tuner they'll make power all over the place.

    The fact some people say they suffer low down may be true but it's so minor your bum won't notice it.

    I'm a fan.


    .
     
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  12. duaned

    duaned Active Member

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    Like I stated, my tuner had removed my standard exhaust manifolds in thinking the Genie tri-Y's he had in stock and the Rhino 4 into 1's would fit and both were a no go. He had to put the originals back on so I could drive it home. Thank goodness he didnt charge for that!
     
  13. monstar

    monstar Naturally as-pirated

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    @duaned now I see why your tuner thought HSV were going to be similar to Genie / Wildcats, but they are quite different. Better but yes would interfere with the pokey HX.
    HSV retains stock cat positioning, same clearance as stock log:
    573A8688-5195-4B76-9A99-00EE036FFAD5.jpeg
    To describe the dimensional situation, the rearmost pipe from cylinder 7 descends vertically on the stock log to meet at the exact same point as the slightly angled pipe in the case of HSV.
    Genie / Wildcat
    2E11DDE1-424A-47A5-969B-30741A4A1889.jpeg
    Whilst this design is actually better than HSV the problem is it fouls against the pokey HX. Where the 3-7 pipe comes down is more forward and lower than either of the two factory headers. Also 1-5 pipe is low and further forward.
    Pacemaker PH5387 or my custom headers would fit ideal but in terms of budget headers I’d say the Advanced A319HP set would also clear.
     
  14. monstar

    monstar Naturally as-pirated

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    Technically long tubes can be 4-1 or 4-2-1, just to clarify the misconception that all 4-1 are long tubes or all 4-2-1 are short!
    Yes 4-1 long tubes are not really suited to a two tonne big cube NA automatic that putts around accelerating legal speeds and accelerated through entire operating range. If was for a manual race car where you were able to hit the magic spot most of the time then why not o_O But even in drag racing the fastest NA build of our car uses 4-2-1 long tubes.
     
  15. Super Coach

    Super Coach GTS, S, CV8Z, SSVR

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    oh man serious. Cant fit my HSV headers to my Motorsport? Will the cats and centre exhaust still bolt up to the Holden Headers if you cant fit the HSV headers cos of the oil cool

    [​IMG]
     
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  16. monstar

    monstar Naturally as-pirated

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    Good shot, yes from that perspective does look close but not impossible. I don't suppose you have a shot looking front-on?
     
  17. PSISLE

    PSISLE Well-Known Member

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    Hey monstar, did anything come of the group buy for the pacey 4-2-1 headers?
     
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  18. monstar

    monstar Naturally as-pirated

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    Yeah, negotiated trade rate need to forward a credit app for final price, haven't got around to it yet sorry.
     
  19. PSISLE

    PSISLE Well-Known Member

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    All good Mate was just curious
     
  20. duaned

    duaned Active Member

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    With all this bullshitting around may as well leave the exhaust stock! Some are saying aftemarket headers and cats sound **** on a stock cat back, drone with full systems ( I had a full difillipo system and it always vibrated through the car) lose the crackle and pop, all the things I dont want!
     
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