Vacuum hose for boost controller - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ChrisD · 08-12-2015, 07:34 PM

Probably a stupid question...

I've got an AVO turbo on my GT86 and need to replace the hoses that connect the boost controller to the inlet and connect the boost controller to the actuator. The hoses that were installed with the turbo have barely lasted 5 months before cracking and splitting.

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Can I just use any silicone vacuum hose? I thought I could, but then I saw that some say "Not designed or suitable for pressurised systems" and I've no idea if these connections count as pressurised or not...

Thanks
Chris

King Tut · 08-13-2015, 09:28 AM

My favorite source for vacuum/boost hose is here since you can buy it by the foot:

http://www.fast-turbo.com/high-perfo...e-vacuum-hose/

ChrisD · 08-13-2015, 10:32 AM

Quote:

Originally Posted by King Tut

My favorite source for vacuum/boost hose is here since you can buy it by the foot:

http://www.fast-turbo.com/high-perfo...e-vacuum-hose/

OK but what I'm asking is: Is vacuum hose like that suitable for between the boost controller and wastegate actuator, and between the boost controller and turbo/inlet ?

I was looking at this stuff: https://www.merlinmotorsport.co.uk/p...r-metre-vt4b2w

But then saw it says "Rated for use up to 200°C but not designed for high pressure applications" and on another site it says "Not designed or suitable for pressurised systems". So now I'm not sure if its suitable as I've no idea what constitutes "high pressure" or a pressurised system. My turbo currently runs about 0.9 bar of boost maximum but if I get the engine rebuilt then I'll be running much more than that and I don't want to have to end up replacing these hoses again after that... but nowhere seems to have a definition of exactly what the limit is for pressure becoming "high" so I've no idea if these hoses are suitable or not.

mrk1 · 08-13-2015, 02:25 PM

I went braided stainless, not cheap when you compare to the by the foot stuff but way cheaper then the problems can can follow a failed line.

xxscaxx · 08-13-2015, 02:48 PM

Like mrk1 I went the AN fitting route but didn't use braided, just push lock hose.

King Tut · 08-13-2015, 03:59 PM

Quote:

Originally Posted by ChrisD

OK but what I'm asking is: Is vacuum hose like that suitable for between the boost controller and wastegate actuator, and between the boost controller and turbo/inlet ?

I was looking at this stuff: https://www.merlinmotorsport.co.uk/p...r-metre-vt4b2w

But then saw it says "Rated for use up to 200°C but not designed for high pressure applications" and on another site it says "Not designed or suitable for pressurised systems". So now I'm not sure if its suitable as I've no idea what constitutes "high pressure" or a pressurised system. My turbo currently runs about 0.9 bar of boost maximum but if I get the engine rebuilt then I'll be running much more than that and I don't want to have to end up replacing these hoses again after that... but nowhere seems to have a definition of exactly what the limit is for pressure becoming "high" so I've no idea if these hoses are suitable or not.

Samco makes good shit. I am sure that will work just fine. I ran silicone hose for 15,000 miles and never had to replace it.

ChrisD · 08-13-2015, 05:24 PM

Thanks for the pictures and info guys - got some ordered now

08-12-2015, 07:34 PM	#1
ChrisD Senior Member Join Date: Jan 2015 Drives: GT86 Location: UK Posts: 305 Thanks: 246 Thanked 195 Times in 81 Posts Mentioned: 2 Post(s) Tagged: 1 Thread(s)	Vacuum hose for boost controller Probably a stupid question... I've got an AVO turbo on my GT86 and need to replace the hoses that connect the boost controller to the inlet and connect the boost controller to the actuator. The hoses that were installed with the turbo have barely lasted 5 months before cracking and splitting. Can I just use any silicone vacuum hose? I thought I could, but then I saw that some say "Not designed or suitable for pressurised systems" and I've no idea if these connections count as pressurised or not... Thanks Chris __________________ My GT86 build so far: AVO Stage 4 Turbo, Carrillo forged con rods, 10:1 CR Carrillo pistons, AVO 3 inch turbo back exhaust, Helix clutch, TheDriveShaftShop drive shafts, lightweight flywheel, NamelessPerformance hydraulic hand brake, KW V3 coilovers... and lots of other little bits Last edited by ChrisD; 08-12-2015 at 08:05 PM.

08-13-2015, 09:28 AM	#2
King Tut NASA SpecE30 Racer Join Date: May 2012 Drives: 2006 Honda S2000 Location: Gulf Breeze, FL Posts: 7,279 Thanks: 607 Thanked 5,759 Times in 3,055 Posts Mentioned: 274 Post(s) Tagged: 10 Thread(s)	My favorite source for vacuum/boost hose is here since you can buy it by the foot: http://www.fast-turbo.com/high-perfo...e-vacuum-hose/ __________________ - King Tut Street/Track Car: 2006 Honda S2000 TT3 \|\| Race Car: 1987 BMW 325is SpecE30 \|\| Tow Vehicle: 2014 RAM 1500 EcoDiesel Sold Cars: 2012 BMW M3 \|\| 2013 Subaru BRZ \|\| 2012 Porsche Cayman R \|\| 2009 Chevrolet Z06 \|\| 2009 BMW M3 \|\| 2004 BMW M3 \|\| 2004 Nissan 350Z

08-13-2015, 02:25 PM	#4
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 21 Post(s) Tagged: 2 Thread(s)	I went braided stainless, not cheap when you compare to the by the foot stuff but way cheaper then the problems can can follow a failed line. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

08-13-2015, 05:24 PM	#7
ChrisD Senior Member Join Date: Jan 2015 Drives: GT86 Location: UK Posts: 305 Thanks: 246 Thanked 195 Times in 81 Posts Mentioned: 2 Post(s) Tagged: 1 Thread(s)	Thanks for the pictures and info guys - got some ordered now __________________ My GT86 build so far: AVO Stage 4 Turbo, Carrillo forged con rods, 10:1 CR Carrillo pistons, AVO 3 inch turbo back exhaust, Helix clutch, TheDriveShaftShop drive shafts, lightweight flywheel, NamelessPerformance hydraulic hand brake, KW V3 coilovers... and lots of other little bits

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