Silicone intake boot joining TB - My guide :)
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  1. #1
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    Silicone intake boot joining TB - My guide :)

    This is no way some master guide!

    I wanted my engine bay to look a little prettier, and smooth out the intake boot bend compared to the stock one - which is also normally becomes fragile/torn.

    There are 2 options.

    1. Buy the proper silicone boot with ICV duct on, but this is about 80/90!!

    or

    2. Make your own using a 90 degree silicone bend

    The finished result
    -dscn0402-jpg

    Problems you come across.

    You have to drill a hole in the silicone to make a connection for the ICV hose, i also cut about 15-20mm off the length of the bend where it connects the throttle body. or it wont fit in.

    What you need to order

    90 degree bend 9.99
    Silicone Hose Coupler 76mm 3" 90 Degree Elbow Blue | eBay

    some nice 76mm t-clamps - about 2.50 each
    could just get cheap jubilee clips, or re-use your existing ones
    1 x 3" 76mm 79mm - 87mm SILICONE HOSE CLAMP T-BOLT | eBay

    22mm brass compression fitting 4.39
    BRASS plumbing pipe compression Tank connector,dif size | eBay

    a 22mm olive 1.99
    PLUMBING FITTINGS 22MM BRASS OLIVE COMPRESSION RING X 5 IN NUMBER | eBay

    a short bit of copper pipe 2
    NEW 22mm copper gas plumbing pipe/tube x 100mm 4" lengt | eBay

    a short bit of 22mm hose (can be silicone vacuum or whatever you want - ID is 22mm) - 5 ish
    Silicone Vacuum Vac Hose Pipe Tube 10mm 13mm 16mm 19mm 22mm 25mm I.D Available | eBay

    Instructions

    Firstly remove your airbox, remove wires off MAF and undo jubilee clips off intake hose.

    Remove the MAF and take off the intake boot, pulling out the ICV connection at the bottom.

    Line this up above your silicone boot and trim off the length (i used a dremel with a cutting disc on)

    Next you need to drill a hole in the silicone boot.

    I drill a small pilot hole then used one of these - 22mm Flat Drill Bit from Aerial Shack Woodspade Drill Bit Forge Master and it made a nice hole.

    This is where the compression fitting comes in.

    Fit in the hole and do up nice and tight, i even used a little gasket sealer on it.

    You will then have this


    next fit the copper pipe and do up - trim the copper pipe down so it is short.

    Fit the 22mm silicone vacuum hose to copper pipe using a jubilee clip, then connect to the ICV black connecter, again using a jubilee clip.

    -dscn0396-jpg

    Connected to car showing ICV connection

    Next is the reversal and connect all up

    Comes to around 25 ish or buy this for SAMCO SILICONE INTAKE HOSE - BMW 318iS E36 | eBay 81

    Any questions, fire away!

    The copper bits are probably better to get from a merchants or a local plumber - buy them a pint
    Last edited by stickle; 04-08-2012 at 11:02.

  2. The Following 3 Users Say Thank You to stickle For This Useful Post:

    Danidge (28-10-2013),Devil (04-08-2012),suj (16-01-2013)

  3. #2
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    Cheers for doing this!!!

  4. #3
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    no problems, some more info on silicone boot can be found here http://store.bimmerworld.com/bimmerw...36z3-p923.aspx

    The stock rubber intake boot on your BMW is a good functional piece, but leaves power on the table. The bellows design creates flow turbulence. Additionally, the common Euro HFM adaptor piece has very abrupt transitions over a short length and disrupts airflow as a result.

    We have found a silicone hose manufacturer made this intake boot to our specifications, replacing the stock rubber boot. High quality 4-layer silicone construction will withstand anything you can throw at it for years to come. No more dry-rotting rubber! Hp increases from 3-8 Hp seen in testing from this piece.
    Its not a great guide, as i didnt take many pics and i cant take anymore at the moment as it wont stop raining :(

  5. #4
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    Moved to the 3 series guide forum, and a cracking idea too mate

  6. #5
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    cool, if people are close to Northants i dont mind helping.

    May also knock a few kits up and sell if people dont want to drill/cut things.

  7. The Following User Says Thank You to stickle For This Useful Post:

    Danidge (28-10-2013)

  8. #6
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    Good guide there mate. Will get round to this for sure. Was a dude selling a premoulded version on ebay for 37 but it seems he is messing people about :(

  9. #7
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    @stickle When using that elbow you have linked, One end is too big for the throtle body, and the other end is too small for the air flow meter??? How did you over come this???

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    @Devil Did you do this? Did you have the problem I had that iv written above???

    Cheers

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    Quote Originally Posted by Loz Dogg View Post
    @Devil Did you do this? Did you have the problem I had that iv written above???

    Cheers
    Nah I haven't done it yet. Are you doing it to a E36?

    Sent from my GT-I9505

  12. #10
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    @Devil yeah I am, a 328! The original boot is bigger than 3" at the AFM end and smaller than 3" at the TB end! I could probably get the elbow to go over the AFM but its quite loose at the TB!

    It looks like in one of his pictures of the finished project theres some kind of black reducer in there, maybe he just forgot to mention this bit??? But id be quite interested to know what he used for this? Im thinking of cutting a bit off the old boot to use.

    Having another look at it tonight!

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