bigandy
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| posted on 25/11/07 at 02:48 PM |
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Silcone hosing - how flexible?
Afternoon all.
I'm looking at buying some silicone hoses for my engine, and I was wondeirng if anyone could tell me how flexible it is?
I need three sizes, 31mm (1 1/4" , 17mm (5/8" and some small bore stuff that is around 8mm (5/16".
The larger stuff needs to get around a couple of right angle bends that are fairly tight (about 100mm radius or so) and also a short length (80mm)
needs to go around a corner of around 30 degrees.
The medium stuff needs to follow a bit more complicated route, one of which involves a couple of right angle bends over a length of around 150mm.
Cheers
Andy
Dammit! Too many decisions....
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nitram38
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| posted on 25/11/07 at 03:42 PM |
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You will be better off buying the bends and joining them.
Silicone is very flexible but it kinks easily. Premade bends get around this.
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mattgriffiths2002
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| posted on 25/11/07 at 04:20 PM |
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Im about to get some hoses and im gonna go for the "superflex" samco hose which is totally flexible as it has an internal wire frame to
stop it kinking when bent. Its fairly dear but well worth it in my opinion as it saves having to get the individual bends etc.
The best price i have found for this is probably rally design unless anyone knows of anywhere else thats cheaper.
Matt
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twybrow
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| posted on 25/11/07 at 04:52 PM |
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I just bought the spiral samco hose from Demon Theives. With the BEC owners disscount, it was quite competitively priced. It does still kink, and if
anything it bends less than normal straight hose, but it will kink much less for the same bend as straight hose. Definately go for bends. I am using
some stanless bends as I already had them. If i had to do a tight radius I certianly would not go for just hose.
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iiyama
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| posted on 25/11/07 at 05:31 PM |
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Siliconehose.com
cheaper by far and NTDWM
If its broke, fix it. If it aint broke, take it apart and find out how it works!
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ChrisGamlin
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| posted on 25/11/07 at 07:13 PM |
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There's no chance normal hose will be useable when bent to the extent you've mentioned, it will bend in half if you want it to, but as
mentioned it kinks very easily. The smaller stuff you could just about wrap around your knee without it kinking, but no tighter. Larger stuff like
31mm will need a much bigger radius.
The wirewound flexible stuff is less likely to kink, but its also a lot less efficient at flowing water for a given bore size, so can cause cooling
issues if your system is otherwise close to its limit, so as others have said, go with proper bends and joiners if at all possible.
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bigandy
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| posted on 26/11/07 at 09:05 AM |
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Hi folks,
Thanks for the replies. I think I'll not take a chance, and get the system made up from thje proper formed angles and connectors.
At the moment I am looking at the ones from Rally design, although surprisingly, Demon Tweeks seem to be around a similar price....
One other question I had, how much can you get away with stretching the pipes over the fittings? I'm looking at using some 16mm hose over a
17mm fitting (plus a fraction more for the swaged ends)
Cheers
Andy
Dammit! Too many decisions....
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ChrisGamlin
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| posted on 26/11/07 at 06:26 PM |
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Going over a 1mm larger oultet shouldnt be a problem I don't think.
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