Is 4mm the preferred size if swapping all 4 vacuum tubes or do they vary in size?
Spi Silicone Vacuum Pipe Conversion
Started by
katsuro
, Sep 16 2014 11:53 PM
Best Answer katsuro , 11 November 2018 - 10:14 PM
Any photos of them at all ?
Here is a short video clip of one of the silcone hoses (red) running from the ECU to the back of the injector assembly: https://www.instagra...m/p/u2n3Nih3Dc/
I made the one to the ECU longer than the OEM plastic one so I can route it far away from the hot manifold which melted it.
The rest of the pipes are blue. I matched their lengths with the OEM ones. Here's a photo showing them under the air box: https://www.instagra...m/p/wMVf_KB3Cq/
Installed these 4 years ago and I've not had a vacuum problem ever since.
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19 replies to this topic
#16
Bobbins
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One Carb Or Two?
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Posted 12 November 2018 - 02:56 PM
#17
katsuro
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Posted 13 November 2018 - 12:20 AM
Is 4mm the preferred size if swapping all 4 vacuum tubes or do they vary in size?
All of mine are 3mm. Just made them different colours to easily identify which one goes where if I take them off at any point.
#18
Bobbins
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One Carb Or Two?
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Posted 13 November 2018 - 10:23 AM
Is 4mm the preferred size if swapping all 4 vacuum tubes or do they vary in size?
All of mine are 3mm. Just made them different colours to easily identify which one goes where if I take them off at any point.
Thanks :)
#19
pakgorgor
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Posted 13 November 2018 - 05:14 PM
Also using the 3mm silicone vacuum hose here without problems. Got the most basic unbranded stuff on Amazon and it works great!
#20
Alpenflitzer
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Posted 29 November 2018 - 02:11 PM
Test Report 2018 Samco Silicon Hoses as Vacuum lines.
Now, after 7 years using the 3 mm ID Samco silicon hoses if have had no trouble.
I can strongly recommend these silicon hoses. The have been developped for motor sport and are simply great. IO even have them in colors. 
Edited by Alpenflitzer, 29 November 2018 - 02:11 PM.
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