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#1
10-01-2004, 01:35 AM
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DOT 5.1 Brake Fluid
Anybody tried it? I'm going to convert mine soon and was just wondering if anyone else has tried it. BTW, the fluid I'm looking at is a non-silicone Polyglycol compound.
Check it out here: http://www.synlube.com/brake.htm If I ever get around to rebuilding the 3.3, after the break-in it will be running synlube oil/atf/gear lube. 
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#2
10-01-2004, 08:40 AM
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isnt 5.1 only recommended for track use? Also, wont most lines not like 5.1? and finally how are you going to make sure you've got 100% of the 3 out before you put in the 5.1?
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#3
10-01-2004, 09:58 AM
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DOT 5 fluid is a SILICONE-based brake fluid. Used primarily on the racing circuit, it does not absorb moisture and does not harm paint.
Silicone DOT 5 fluid has some other characteristics that you should beware of. Silicone fluid compresses slightly under pressure, which can cause a slightly spongy brake pedal feel. Silicone fluid also attracts air more than polyglycol fluid does, which makes brake bleeding harder. It also tends to vaporize slightly just below its boiling point; and it will aerate from prolonged vibration. All of these factors mean that DOT 5 silicone fluid should never be used in an antilock brake system, as operating efficiency will be reduced. DOT 5.1 is a non-silicone SYNTHETIC brake fluid that is designed to be compatible with modern ABS systems. DOT 3, 4, and 5.1 are polyglycol ether-based chemistries and will mix with each other without a complete flushing. This is similar to being able to mix synthetic and conventional motor oils together in your engine or synthetic and regular tranny fluids. These type fluids are hygroscopic (meaning they have an ability to mix with water and still perform adequately.) However, water will drastically reduce the boiling point of fluid. In a passenger car this is not an issue. In a race car it is a major issue because as the boiling point decreases the performance ability of the fluid also decreases. DOT 5.1 also has a higher wet and dry boiling point than the DOT 3, 4 or the silicone DOT 5. WET BOILING POINT: DOT 3 +284°F DOT 4 +311°F DOT 5 SILICONE +356°F DOT 5.1 Long Life +424°F DRY BOILING POINT: DOT 3 +401°F DOT 4 +446°F DOT 5 Silicone +500°F DOT 5.1 +585°F For a simple explanation of wet and dry boiling points, check this thread: http://www.subaru-svx.net/forum/show...threadid=21717 Final answer. You should be able to use the Synthetic DOT 5.1 without any problems in your SVX. If you are a spirited driver/braker, the boiling points are in your favor. The wet boiling point of the 5.1 fluid is fairly equivalent to the dry boiling point of the DOT 4.
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. Subaru Ambassador 1996 Polo Green LSi #216..138,100 miles...SOLD JFICX8659TH100216.....Date of Manufacture: November 16, 1995..... Fuji Heavy Industries..Ōta North Plant....Ōta City,. Gunma Prefecture, Japan In-Service Date: January 2, 1997 "The Pristine Green Polo Machine” First Polo Green on the Network First Clear front turn signals, JDM Alcyone hood emblem, rear panel, and BOXER engine cover on the Network (US) (2000) First 5000K HID factory fog lights (2007) First SVX JDM BBS wheels on a USDM SVX (2013) HID lighting (5000K) for headlight and H3 fog lights, PIAA SuperExtreme 120W high beams, rebuilt EG33 longblock, Cometic head gaskets, Phase II flexplate, AMR aluminum radiator with custom silicone hoses, 160A high-output alternator in aluminum-ceramic coated case, new design alternator wiring upgrade v.4, rare factory headlight protectors, refinished JDM BBS mesh aluminum wheels and custom, polished billet aluminum new hex center caps, LED grille mod, R1 Concepts high-carbon cryo slotted rotors, Akebono ceramic pads, Goodridge S/S braided brake lines, Smallcar Stage 1 shift kit, ThermalTech aluminum/ceramic-coated valve covers, Energy Suspension urethane front & rear swaybar bushings, Bontrager22 rear swaybar with QS Components Chromoly Teflon/Kevlar endlinks, "$15.00/5 minute" suspension mod. Hella Supertone horns, Custom stainless steel exhaust system with 2" headpipes, Magnaflow cats, AeroTurbine AR25 resonator /AWD "Bullet" muffler. R.I.P. 2010 Subaru Outback Limited 2.5 CVT...338,000 miles. Totaled by a 1,300 lb. COW March 4, 2016  2014 Hyundai Avante Limited ...178,000 miles. Actually quieter and smoother than the Outback  2007 Mazda Miata MX-5 PRHT...102,000 miles. Plenty of parts, service and windshields.  4th Registered Network member —2/21/2001 My NEW locker..I...My Email..I..Wikipedia/SVX . . Last edited by svxcess; 10-01-2004 at 10:39 AM.
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#5
10-01-2004, 10:21 AM
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I was using ATE super Blue racing fluid, but have recently changed over to GS610 fluid. It has better specs than any of the others. But at $40.00/pint, its definitely not cheap!
http://www.gs610.com/compare1.htm
__________________
. Subaru Ambassador 1996 Polo Green LSi #216..138,100 miles...SOLD JFICX8659TH100216.....Date of Manufacture: November 16, 1995..... Fuji Heavy Industries..Ōta North Plant....Ōta City,. Gunma Prefecture, Japan In-Service Date: January 2, 1997 "The Pristine Green Polo Machine” First Polo Green on the Network First Clear front turn signals, JDM Alcyone hood emblem, rear panel, and BOXER engine cover on the Network (US) (2000) First 5000K HID factory fog lights (2007) First SVX JDM BBS wheels on a USDM SVX (2013) HID lighting (5000K) for headlight and H3 fog lights, PIAA SuperExtreme 120W high beams, rebuilt EG33 longblock, Cometic head gaskets, Phase II flexplate, AMR aluminum radiator with custom silicone hoses, 160A high-output alternator in aluminum-ceramic coated case, new design alternator wiring upgrade v.4, rare factory headlight protectors, refinished JDM BBS mesh aluminum wheels and custom, polished billet aluminum new hex center caps, LED grille mod, R1 Concepts high-carbon cryo slotted rotors, Akebono ceramic pads, Goodridge S/S braided brake lines, Smallcar Stage 1 shift kit, ThermalTech aluminum/ceramic-coated valve covers, Energy Suspension urethane front & rear swaybar bushings, Bontrager22 rear swaybar with QS Components Chromoly Teflon/Kevlar endlinks, "$15.00/5 minute" suspension mod. Hella Supertone horns, Custom stainless steel exhaust system with 2" headpipes, Magnaflow cats, AeroTurbine AR25 resonator /AWD "Bullet" muffler. R.I.P. 2010 Subaru Outback Limited 2.5 CVT...338,000 miles. Totaled by a 1,300 lb. COW March 4, 2016 2014 Hyundai Avante Limited ...178,000 miles. Actually quieter and smoother than the Outback 2007 Mazda Miata MX-5 PRHT...102,000 miles. Plenty of parts, service and windshields. 4th Registered Network member —2/21/2001 My NEW locker..I...My Email..I..Wikipedia/SVX . . Last edited by svxcess; 10-01-2004 at 10:26 AM.
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#6
10-01-2004, 07:29 PM
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__________________
1994 Pearl LS Black top ( The Penguin) "was" The only man alive who drives a "Suba SSV".......according to my insurance company***sold*** "was" The Only Subaru Svx Owner in Laredo Tx., or maybe atleast only owner registered here.... http://www.cardomain.com/id/phoenix_3737
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#7
10-02-2004, 12:41 AM
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ah cool, good to know
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