GEMS intake pipe
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Thread: GEMS intake pipe

  1. #1
    SOPHOMORE ROVER
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    GEMS intake pipe

    Gents,

    The intake pipe of the V8 GEMS has two "boxes" on it, I assume these are there to equalize pulses in the intake, please correct me if I'm wrong..

    GEMS intake pipe-intake.jpg

    If I take these boxes of, does it increase throttle response?


    I thought I better ask before I do something I might regret later on

    Anyone who modified the intake?

    Thanks

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  3. #2
    JUNIOR ROVER
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    Re: GEMS intake pipe

    I've got one car that has them and one that someone has cut them off and plugged the holes. Seems to make no difference at all.
    96 4.6HSE
    98 4.0 Police spec
    and a number of others I maintain for the owners.

  4. #3
    SENIOR ROVER
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    Re: GEMS intake pipe

    that box is an intake muffler, it allows for quiet engine operation under heavy throttle. if removed it makes the engine sound similar to a japanese tuner. otherwise no difference at all.
    2k p38 4.6
    95 lwb 4.6
    01 d2 4.0

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  6. #4
    SOPHOMORE ROVER
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    Re: GEMS intake pipe

    Ah, ok guys.
    Muffler I wouldn't have thought..

  7. #5
    FRESHMAN ROVER
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    Re: GEMS intake pipe

    Guys, another thing to watch is that the bottoms of these can have holes melt in them due to the proximity of the exhaust manifold. I so, good quality silicone sealant will fix the issue. If there are any holes, of course you are getting unfiltered air straight into the engine.

  8. #6
    SENIOR ROVER
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    Re: GEMS intake pipe

    Quote Originally Posted by Reinhoud View Post
    Gents,

    The intake pipe of the V8 GEMS has two "boxes" on it, I assume these are there to equalize pulses in the intake, please correct me if I'm wrong..

    Click image for larger version. 

Name:	intake.jpg 
Views:	27 
Size:	577.3 KB 
ID:	271924

    If I take these boxes of, does it increase throttle response?


    I thought I better ask before I do something I might regret later on

    Anyone who modified the intake?

    Thanks
    btw, if I do recall correctly, the gems had a flexible rubber hose similar to the later 14cux. the one pictured must have come from a discovery 2 which if my memory is correct the only model to have used plastic and not rubber intake pipes.
    2k p38 4.6
    95 lwb 4.6
    01 d2 4.0

  9. #7
    JUNIOR ROVER
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    Re: GEMS intake pipe

    I've got a 96, a 97 and a 98 here at the moment. The 96 has the rubber one, the other two have the one shown above. I suspect they found the rubber ones were perishing (or the plastic ones were cheaper).
    96 4.6HSE
    98 4.0 Police spec
    and a number of others I maintain for the owners.

  10. #8
    Premium Member Escape's Avatar
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    Re: GEMS intake pipe

    Quote Originally Posted by Richard_G View Post
    I've got a 96, a 97 and a 98 here at the moment. The 96 has the rubber one, the other two have the one shown above. I suspect they found the rubber ones were perishing (or the plastic ones were cheaper).
    Probably the latter...
    I can confirm the intake is different between 95/96 and 97/98 GEMS, along with some other changes.

    Filip
    4.0 SE manual, 1997, 'Priscilla': current daily
    4.0 SE manual, 1995, 'Piper', built for offroad with tuned 4.6 on MS: lost in fire
    4.6 SE auto, 1995, 'Prue': awaiting attention
    2.5 DT manual, 1996, 'Paige': retired and stripped
    D90 TD5, 2005, 'Nessie' TR2 racer: sold

  11. #9
    SOPHOMORE ROVER
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    Re: GEMS intake pipe

    My rego papers say mine is from 1997, the sticker in the engine bay says 1996.

  12. #10
    FRESHMAN ROVER Sam 1979's Avatar
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    Re: GEMS intake pipe

    They probably changed to the the plastic version when they gave the GEMS the narrower air filter and box? Early on I bought a filter for my GEMS based on the fact that it was registered in December 1996 to find it didn't fit ('97 model) and it actually took the same filter as used in the other one (a '98 registered / '99 model) Bosch. If I'd opened both bonnets and looked first I'd have researched it in advance and thought about which model year version was actually needed.

  13. #11
    SENIOR ROVER
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    Re: GEMS intake pipe

    the rubber hoses for the gems became unavailable for about two years, in the meantime the factory installed hose begun to deteriorate just as thor engine made it to market thus, many shops took advantage of this occasion and retrofitted many gems with bosh intake hose.

    the plastic hose was never installed from factory to the gems, it was an aftermarket retrofit.
    2k p38 4.6
    95 lwb 4.6
    01 d2 4.0

  14. #12
    JUNIOR ROVER
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    Re: GEMS intake pipe

    Quote Originally Posted by 95classiclwb View Post
    the rubber hoses for the gems became unavailable for about two years, in the meantime the factory installed hose begun to deteriorate just as thor engine made it to market thus, many shops took advantage of this occasion and retrofitted many gems with bosh intake hose.

    the plastic hose was never installed from factory to the gems, it was an aftermarket retrofit.
    Rubbish! If you look at a GEMS plastic intake and a Thor plastic intake you will see they are totally different and not interchangeable. Rubber one (ESR2921) up to VIN TA346973, Plastic one (ESR4216) from VIN VA 346974 to WA410481 (which is the one shown in the OPs picture). Then there are two further different ones for the Thor, PHD103610 for an XA prefix VIN and PHD104050 for YA and later prefix VIN.
    96 4.6HSE
    98 4.0 Police spec
    and a number of others I maintain for the owners.

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