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WTB: Flappy valve shaft plastic colllar

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Old 11-20-2018, 03:35 PM
  #16  
SwayBar
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This small delay will give you plenty of time to clean and re-clean the intake to make sure it's absolutely clean and free from debris.
Old 11-20-2018, 03:41 PM
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Originally Posted by SwayBar
This small delay will give you plenty of time to clean and re-clean the intake to make sure it's absolutely clean and free from debris.
Good point
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Old 11-20-2018, 05:30 PM
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karl ruiter
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Ah, I see. They ride inside the spring, not the bore of the housing. What material will you use for this? I use PLA and ABS on my printer, but not sure if either of those will hold up to heat and fuel.
Old 11-20-2018, 05:43 PM
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Originally Posted by Luis A.
Nate: I don't believe the plastic spacers would need to have the intricate pattern on the back, as seen in #2. It looks to me like a flat surface there would pose no detriment to the functioning of the shaft. Then it should be fairly simple to 3D print, no?
Good to know about the spoke pattern. Now they will be even easier to replicate.

Originally Posted by Luis A.
Karl, The spacers' only 'critical' dimension is the ID where the shaft fits. Take a look at them here. They just are placed one against the other and the OD loosely (if that) contains the spring within the 'spool' the spacers form (Dwayne's pic).
Great. This makes them candidates for FDM printing as apposed to SLA if they needed a tighter tolerance. That mean these parts will be pretty inexpensive.

Originally Posted by ROG100
There is the problem and as I said the parts are NLA. If we could get a sample part we could have them made. Maybe Mr. Edwards has the dimensions.
Used to be NLA. . Looks like Rob is on the case.

Originally Posted by Rob Edwards
I've got a couple here, will scan them and send to Nate.
Cool. Can you also verify that the #2 and the #7 spacers are identical like Luis stated?

Originally Posted by Luis A.
Here the dimensions of mine. Needless to say since I am the instigator of this project I am willing to put up some funding to get it done... (sorry for the huge pics...)

Thank you all!








Great Luis. You missed a couple of dimensions. See pic below. Also no funding needed, but thanks for the offer. Would you be willing to do a test fit and function test if I sent you a few prototype spacers?




Originally Posted by ROG100
Nate - I will take 100 please
Done. As soon as I get them check fit and verified by Luis (or Rob if Luis can't) I will put you first on the list.

Originally Posted by karl ruiter
Ah, I see. They ride inside the spring, not the bore of the housing. What material will you use for this? I use PLA and ABS on my printer, but not sure if either of those will hold up to heat and fuel.
Yeah PLA will never work in that application. Much too brittle and will soften at low temperatures. ABS is much better but not ideal. I will be making these out of Nylon. Great wear properties and resistant to petrol and other solvents.

Old 11-20-2018, 05:56 PM
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I can't absolutely verify that #2 and #7 are identical since I lost #2 but I can't envision how they would be different.

I won't have my intake back for maybe 2 or 3 weeks so any fitment test would have to wait until then, but I am happy to do it.

The depth I am missing in your annotated pic is 2.18mm and the inner diameter 19.30mm.

Regarding the ribbing in the back of the part, I imagine it's a way to make the part stiff while minimizing the amount of raw material utilized... The only other thing I can think of is that the small chambers can keep some oil in the rotating surfaces. To that end, I would just carve some channels with a dremel if the reproduced part ends up being flat in the back for production simplicity.
Old 11-20-2018, 07:03 PM
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Originally Posted by ROG100
There is the problem and as I said the parts are NLA. If we could get a sample part we could have them made. Maybe Mr. Edwards has the dimensions.
Didn't I give you my last new one?
Old 11-20-2018, 07:28 PM
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Originally Posted by Luis A.
I can't absolutely verify that #2 and #7 are identical since I lost #2 but I can't envision how they would be different.

I won't have my intake back for maybe 2 or 3 weeks so any fitment test would have to wait until then, but I am happy to do it.

The depth I am missing in your annotated pic is 2.18mm and the inner diameter 19.30mm.

Regarding the ribbing in the back of the part, I imagine it's a way to make the part stiff while minimizing the amount of raw material utilized... The only other thing I can think of is that the small chambers can keep some oil in the rotating surfaces. To that end, I would just carve some channels with a dremel if the reproduced part ends up being flat in the back for production simplicity.
Thanks for the additional dimensions. It will be easy enough to to keep the OEM geometry intact, that way any original design intent is not lost.
Old 11-20-2018, 07:29 PM
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Originally Posted by SeanR
Didn't I give you my last new one?
Hey Sean if I got you a couple prototype spacers next week would/could you do a quick check fit? I could ship them to Roger if that is easiest.
Old 11-20-2018, 08:17 PM
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Originally Posted by GT6ixer
Hey Sean if I got you a couple prototype spacers next week would/could you do a quick check fit? I could ship them to Roger if that is easiest.

Yep, would be happy to do so. Have plenty of intakes to give it a go on.
Old 11-20-2018, 09:01 PM
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Originally Posted by SeanR
Yep, would be happy to do so. Have plenty of intakes to give it a go on.
Great. I'll PM you and Roger when I have a set to send down your way.
Old 11-21-2018, 11:16 AM
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#2 & #7 are identical - same part number
Old 11-26-2018, 07:01 AM
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Originally Posted by GT6ixer
Great. I'll PM you and Roger when I have a set to send down your way.
Ok guys, These are heading Roger's way today. They are within +/- 0.010" of the major dimension provided by Luis and verified by a scan that Rob provided to me.


Old 11-26-2018, 08:47 AM
  #28  
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Originally Posted by Luis A.
Karl, The spacers' only 'critical' dimension is the ID where the shaft fits. Take a look at them here. They just are placed one against the other and the OD loosely (if that) contains the spring within the 'spool' the spacers form (Dwayne's pic).
Based on my observation, the height of the hat (4.91mm - 0.92mm) dimension is also critical. If the combined height of the 2 hats, 2 shims and wavy washer is lower than required due to the tolerance of the hat height, the torsion spring may end up binding. I would add some material to the height of the hat, which can be sub sequentially sanded down "in the field". The ID will most likely come in undersized with the current measurement due to the flats on the caliper measuring surface. That's OK as the final ID can then be drilled accurately. Perhaps measure the shaft OD to determine an appropriate final ID.

Old 11-26-2018, 10:52 AM
  #29  
Rob Edwards
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Shaft OD- 9.97 mm.

Old 11-26-2018, 11:18 AM
  #30  
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Thanks Nate - will get them over to Sean for a test fit.


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