Ghetto engineering - Master cylinder style, I had to share |
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Ghetto engineering - Master cylinder style, I had to share |
Mikey914 |
Aug 31 2017, 11:43 PM
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#1
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The rubber man Group: Members Posts: 12,649 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
As may of you know we are in the process of producing master cylinders. Unlike some vendors with impeccably clean "Laboratory " complete with Periodic table. This is how we get things done.
Phase 1 We have a test bed that simulates braking, and are looking to see where our weak points are. We will put no less than 25,000 cycles on this part. This will take awhile as we can only get about 200 at a time without the motor heating up, but believe this to be a very rigorous test. Phase 2 If we make it to 25,000 we will start measuring output from the pressure lines. This will be thoroughly broken in system we will be testing, not just testing with air pressure. After the final round of testing we will tear it down to determine wear on critical components and examine the seals to see how well they have held up. If they show excessive wear we will look at improvements that may need to be made. Especially so if we don't make 25,000. My only serious concern is that the metal on the test stand may fatigue making us repair it before we hit 25,000 cycles. We are currently a little less than 5000 cycles. I thought I'd share this as many of you don't realize what we do behind the scenes t o actually make the parts we all need. https://youtu.be/UskyAeVAF9Y https://www.youtube.com/watch?v=UskyAeVAF9Y |
Andyrew |
Sep 1 2017, 06:18 AM
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#2
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
How about you put some aluminum fins on the motor and put a fan flowing on it? Also maybe one of those home timers that can cycle something every 15 minutes so its not pumping for hours at a time? Your going to create heat that the MC was never designed for.
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mb911 |
Sep 1 2017, 06:50 AM
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#3
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914 Guru Group: Members Posts: 6,819 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
How about you put some aluminum fins on the motor and put a fan flowing on it? Also maybe one of those home timers that can cycle something every 15 minutes so its not pumping for hours at a time? Your going to create heat that the MC was never designed for. (IMG:style_emoticons/default/agree.gif) |
saigon71 |
Sep 1 2017, 06:50 AM
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#4
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Senior Member Group: Members Posts: 1,998 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
Love it! (IMG:style_emoticons/default/beerchug.gif)
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GeorgeRud |
Sep 1 2017, 07:51 AM
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#5
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Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
Well, at least the flexing of the stand helps replicate the flexing of the body over these 40 something years of use. (IMG:style_emoticons/default/biggrin.gif)
Thanks for sharing the testing video. |
tygaboy |
Sep 1 2017, 08:39 AM
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#6
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914 Guru Group: Members Posts: 5,279 Joined: 6-October 15 From: Petaluma, CA Member No.: 19,241 Region Association: Northern California |
I have a few spare wiper motors... (IMG:style_emoticons/default/idea.gif)
Can you say "Electronic Power Brakes"? (IMG:style_emoticons/default/lol-2.gif) |
Elliot Cannon |
Sep 1 2017, 09:41 AM
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#7
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None |
Your test devise sounds like my heart when I wake up in the morning. (IMG:style_emoticons/default/av-943.gif)
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KELTY360 |
Sep 1 2017, 09:53 AM
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#8
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914 Neferati Group: Members Posts: 5,031 Joined: 31-December 05 From: Pt. Townsend, WA Member No.: 5,344 Region Association: Pacific Northwest |
That's a really boring video. Maybe if you had a girl in a bikini fanning the motor it would liven things up. (IMG:style_emoticons/default/dry.gif)
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Mikey914 |
Sep 1 2017, 10:07 AM
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#9
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The rubber man Group: Members Posts: 12,649 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Your test devise sounds like my heart when I wake up in the morning. (IMG:style_emoticons/default/av-943.gif) Elliot "Jarvack" (IMG:style_emoticons/default/biggrin.gif) We actually thought about the additional heat, knowing that this would exceed normal use is actually a plus for us. Also one of the reasons we wanted to do an analysis of the unit after the test. We may also go to a larger motor and let it run til it fails. The kill switch is the brake warning switch. Although I'm pretty sure the stand would fail 1st. |
914Sixer |
Sep 1 2017, 12:25 PM
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#10
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914 Guru Group: Members Posts: 8,872 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
Probably a more vigorous testing setup than the industry standard and thousands of dollars less in costs. (IMG:style_emoticons/default/aktion035.gif)
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PanelBilly |
Sep 1 2017, 01:04 PM
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#11
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914 Guru Group: Members Posts: 5,799 Joined: 23-July 06 From: Kent, Wa Member No.: 6,488 Region Association: Pacific Northwest |
Move this thread to the sandbox and I'll post some photos of machine that will work the brake back and forth much faster. (IMG:style_emoticons/default/devil.gif)
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bigkensteele |
Sep 1 2017, 04:17 PM
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#12
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Major Member Group: Members Posts: 2,197 Joined: 30-August 04 From: Cincinnati, OH Member No.: 2,660 Region Association: South East States |
I love it. Good engineering is the exercise of creatively solving a problem, not necessarily spending a ton of money to solve a problem. Or at least I think I remember hearing that in an episode of McGyver.
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Dr Evil |
Sep 2 2017, 09:45 AM
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#13
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Send me your transmission! Group: Members Posts: 22,995 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
Awesome, but needs over dub with porno music and sound effects.
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Mikey914 |
Sep 2 2017, 09:48 AM
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#14
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The rubber man Group: Members Posts: 12,649 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Yes Brown chicken brown cow
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bdstone914 |
Sep 2 2017, 09:49 AM
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#15
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bdstone914 Group: Members Posts: 4,514 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
I think you are going to metal fatigue the pedal set housing based on the amount of flex that is happening. Support at the master cylinder will reduce that.
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Mikey914 |
Sep 2 2017, 10:23 AM
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#16
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The rubber man Group: Members Posts: 12,649 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Figured I'd see what broke 1st.
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ConeDodger |
Sep 2 2017, 02:31 PM
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#17
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Apex killer! Group: Members Posts: 23,573 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California |
My experience with not just our 914 Master cylinder but in general is they don't fail because of use, they fail because of disuse. The sit with the piston in one place for long periods and it results in corrosion, particularly if the system isn't bled in a timely manner.
As for posting this in the Sandbox, someone's been watching too much porn... |
timothy_nd28 |
Sep 23 2017, 09:25 PM
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#18
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
Is this thing still chugging away or did something break?
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porschetub |
Sep 23 2017, 09:31 PM
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#19
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Advanced Member Group: Members Posts: 4,697 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
My experience with not just our 914 Master cylinder but in general is they don't fail because of use, they fail because of disuse. The sit with the piston in one place for long periods and it results in corrosion, particularly if the system isn't bled in a timely manner. As for posting this in the Sandbox, someone's been watching too much porn... Not sure appears some (URO) last a shorter time,nothing wrong with this test IMO and nice to see someone doing it...appears some don't bother...did I mention that before (IMG:style_emoticons/default/av-943.gif) (IMG:style_emoticons/default/av-943.gif) |
Mikey914 |
Sep 23 2017, 10:08 PM
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#20
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The rubber man Group: Members Posts: 12,649 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Broke somewhere around 10k. The weld broke. Kept cycling but not a full pressure as the plate flexed at the weld.
The EURO one I put on my car lasted 5 cycles. |
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