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> SS Brake Hose... Racing vs DOT
Slick914
post Sep 28 2008, 07:51 PM
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What's the difference between the racing SS brake hoses and the street ones?

My car has the racing ones on right now, but I do have the street versions on standby.
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DBCooper
post Sep 30 2008, 01:39 PM
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I apologize for beating this to death, but here we go. (IMG:style_emoticons/default/dead horse.gif)

I’m honestly intrigued that the agency in charge would let such a dangerous product onto the market. I’ve never had a problem with those hoses, but it seems I might be the only one who hasn’t. Not to even get into the performance motorcycles that come from the factory with braided hose. This genuinely surprises me, because I can’t imagine why insurance companies and product liability lawyers haven’t had a field day with it. A government agency being inept? I have no problem believing that, but overlooked by shady lawyers? I’d think those jackals could sniff out carrion anywhere.

Anyway I had to find out more, so I looked up the NHTSA TP-106-10 standard and had a read, (see it HERE). This standard was issued in April of this year, and sets the testing and performance standards for brake hoses. The list of tests is pretty impressive and seems complete, including:

LABELING INSPECTION
12.A.2. CONSTRICTION TEST
12.A.3. EXPANSION TEST
12.A.4. BURST STRENGTH TEST
12.A.5. WHIP TEST
12.A.6. TENSILE STRENGTH TEST
12.A.7. LOW TEMPERATURE RESISTANCE TEST
12.A.8. END FITTING CORROSION TEST
12.A.9. OZONE RESISTANCE TEST
12.A.10. WATER ABSORPTION TEST)
12.A.11. BRAKE FLUID COMPATIBILITY TEST
12.A.12. HIGH TEMPERATURE IMPULSE TEST
12.A.13. DYNAMIC OZONE TEST)
12.A.14. TRACER CORD IDENTIFICATION

All these tests refer directly back to SAE, ASTM and other standards bodies requirements for testing, materials, and performance. As a quick summary the two most compelling problems mentioned in our discussions would covered by the tensile and whip tests. These tests are conducted with pressurized hoses:

Tensile Test - ( A ) Conduct the slow pull test by applying tension at a rate of 1" per minute. The assemblies shall withstand a minimum pull of 325 lbs. ( B ) Conduct the fast pull test by applying tension at a rate of 2" per minute. The assemblies shall withstand a minimum pull of 370 lbs.

Whip Test – This is as the description implies, whipping the hose back and forth. “The time duration for the whip test shall be 35 hours at a machine speed of 780 to 800 rpm.”

If you read the full text these aren’t sloppy, easy tests. I could imagine that a brake hose that was too short for the application would fail if yanked lock-to-lock between the hard line mount and your caliper, but other than that, which is misuse, I don’t see anything in the test being insufficient for the application. Same with the whip test. That test, by the way, is what separates the “DOT” hoses from “race” hoses. To pass the Whip Test the hose manufacturers install a rubber or plastic collar from the fitting up through the first two inches of the braided part of the hose. That gives that section of hose some support so it doesn’t go into shear against the fitting. No plastic reinforcement means “race” hose.

I know more now, but still have no idea how so many brakes could have catastrophic failures on public highways without provoking a firestorm of lawsuits. That’s OK, I guess, there are a lot of things I don’t understand.

I did read something interesting that I didn’t know, about the metric system. Did you know we’re on it? From the introduction to this standard:

“Section 5164 of the Omnibus Trade and Competitiveness Act (Pub. L. 100-418) establishes that the metric system of measurement is the preferred system of weights and measures for trade and commerce in the United States.”

I wasn't aware of that, so it was very interesting news. Especially since every measurement in this standard was exclusively in Imperial values.
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Slick914   SS Brake Hose... Racing vs DOT   Sep 28 2008, 07:51 PM
southernmost914   The street set has gone through the D.O.T. ,testin...   Sep 28 2008, 09:03 PM
GeorgeRud   Though you get a firmer pedal, keep an eye on the ...   Sep 28 2008, 09:28 PM
auerbach   This is a question for Chris or Ed at Tangerine Ra...   Sep 28 2008, 10:57 PM
sean_v8_914   Steve is correct. the Teflon lined ones do not deg...   Sep 29 2008, 12:03 AM
Cap'n Krusty   Whichever of the 2 you choose, it's wise to re...   Sep 29 2008, 12:26 AM
DBCooper   Whichever of the 2 you choose, it's wise to r...   Sep 29 2008, 07:27 AM
Cap'n Krusty   The DOT is concerned with "now", not the...   Sep 29 2008, 09:19 AM
DBCooper   The DOT is concerned with "now", not th...   Sep 29 2008, 11:02 AM
URY914   I had a SS hose blow out once . Never has a stock ...   Sep 29 2008, 09:50 AM
shoguneagle   Very good info in this thread. I have DOT approve...   Sep 29 2008, 10:04 AM
jmill   I worked in the aircraft industry for years and I ...   Sep 29 2008, 12:47 PM
DBCooper   I don't get it. If that hose is as deadly as ...   Sep 29 2008, 09:00 PM
GeorgeRud   I don't think that many racers were too concer...   Sep 29 2008, 09:53 PM
DBCooper   Fair enough and I have no doubt about that, but th...   Sep 29 2008, 10:00 PM
jmill   The SS hose is a great product. There's only ...   Sep 30 2008, 09:21 AM
So.Cal.914   For sake of discussion, say you do have a failure ...   Sep 30 2008, 09:31 AM
jd74914   That should be true since they will look at ways t...   Sep 30 2008, 10:59 AM
Mark Henry   :agree: with the cap'n, I too have seen the f...   Sep 30 2008, 11:18 AM
andys   I don't know the protocol for how the DOT proc...   Sep 30 2008, 11:37 AM
DBCooper   I apologize for beating this to death, but here we...   Sep 30 2008, 01:39 PM
Spoke   I had braided hoses on the front of my car when I ...   Sep 30 2008, 02:46 PM
jmill   With performance motorcycles you'll notice tha...   Sep 30 2008, 03:13 PM
jmill   One other thought. The front brake reservoir is a...   Sep 30 2008, 03:28 PM
So.Cal.914   One other thought. The front brake reservoir is ...   Sep 30 2008, 04:28 PM
jmill   You got me there. :D BTW - Your avitar is outs...   Sep 30 2008, 10:02 PM
Wilhelm   So..................... Does anyone make a SS cove...   Sep 30 2008, 10:54 PM
DBCooper   Sorry, but how is that relevant? You've defor...   Sep 30 2008, 11:28 PM
jmill   The purpose of the picture was to show that the ho...   Oct 1 2008, 10:14 PM
Slick914   Didn't mean to bring up a sore subject. :huh:...   Oct 1 2008, 10:21 PM
sean_v8_914   I did not know/think about many of these valid poi...   Oct 1 2008, 10:59 PM
DBCooper   First off I'm not trying to be argumentative. ...   Oct 2 2008, 12:57 PM
Mark Henry   First off I'm not trying to be argumentative....   Oct 2 2008, 02:11 PM
SirAndy   just you've had the advice of a few long term...   Oct 2 2008, 03:16 PM
jmill   The steel braid isn't holding the hose in that...   Oct 2 2008, 03:20 PM
DBCooper   Both types of hose are TUV certified. If you want...   Oct 2 2008, 03:32 PM
SirAndy   Both types of hose are TUV certified. I've s...   Oct 2 2008, 04:34 PM
DBCooper   [quote name='DBCooper' post='1086756' date='Oct 2...   Oct 3 2008, 04:14 PM
ztbell   [quote name='DBCooper' post='1086756' date='Oct ...   Oct 4 2008, 09:00 AM
ztbell   :blowup: Stay with the D.O.T. approved SS lines....   Oct 2 2008, 04:47 PM
Cap'n Krusty   Please correct me if I'm wrong, but it appears...   Oct 2 2008, 07:56 PM
southernmost914   Please correct me if I'm wrong, but it appear...   Oct 3 2008, 05:37 AM
hcdmueller   Both types of hose are TUV certified. I've ...   Oct 3 2008, 05:18 AM
Mark Henry   :deadhorse:   Oct 3 2008, 04:23 PM
DBCooper   :deadhorse: :deadhorse:   Oct 3 2008, 06:00 PM
Mark Henry   Geeezzeeee...you guys follow the link.... http://...   Oct 4 2008, 09:12 AM
swl   Geeezzeeee...you guys follow the link.... http:/...   Oct 4 2008, 09:32 AM


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