Just a quick question, but I'm about to buy a bunch of silicon vacuum hoses for rerouting all the lines for my boost controller and BoV/wastegate. I totally forget which size I need. I'm pretty sure it's 4mm, 5mm, or 6mm inner diameter hose, but I was wondering if anyone here has a preference from experience using different sized lines. This also might be helpful for others looking to buy some replacement hoses to replace their crappy packaged lines.

Here's the site I was ordering from:
http://www.boostcontroller.com/index.php?category=8

Thanks for your help.

 

The standard fittings most turbo applications use is a 5/32" vacuum hose. Should make a 4mm hose.

 

Cool... that's what the site says I just heard other recommendations from elsewhere that had me second guessing that.

Oh, and log onto AIM foo...

 

Silicone is the way to go, sizing will have little effect on the efficiency of the component, of course if its tight. Try these guys out also

http://www.turbohoses.com/

www.siliconhoses.com

http://www.hightempsilicone.com/cate...onevacuumhose/

 

I know it's way more expensive but why not stainless?

 

I'd rarther deal with silicon. Easier to cut an easier to deal with in general.

 

Well ---It IS a LOT more expensive, plus the tight turns can not be as easily made, it kinks, also, the fittings are a hinderance in tight places, plus, Stainless steel braided teflon inner tube line is designed specifically for pressure......The stainless steel braid reinforces the teflon inner tube, under certain conditions, the inner tube may collapse.

 

Or, as I found out, when using SS lines the teflon may melt when you use them as a boost line to a wastegate that passes close to the turbo

 

Thats true also --Its actually more of a shrink factor and they become brittle to the point of failing under HIGH heat contacts. Silicone will fail also, but it is so easily routed that all danger points can be avoided.

SS is unsurpassed for tranfer of liquids or air, Hot or Cold, HP or LP

 

Thanks guys. I have now been educated.

 

4 and 5 will cover 95% of your needs. I can't think of a hose on a typical kit that is 6mm or 3mm. We use 4mm and 5mm for everything. Hope that helps.