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  Nozzle Check Valve Part # for HR 143A?
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   Author  Topic: Nozzle Check Valve Part # for HR 143A?  (Read 2891 times)
dooitvintage
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Re:Nozzle Check Valve Part # for HR 143A?
« Reply #20 on: January 15, 2013, 09:03:54 AM »
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took this one out of the other 137A. It almost looks like it has shrunk a little in size. And if it has even a slight curvature to it how will that affect it's performance?
That question for DoubleT(or anyone, he is kind of a resident expert on these Til's). Or does it perform a not so critical role?

« Last Edit: January 15, 2013, 09:05:19 AM by dooitvintage » Report to moderator Logged
hermit
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Re:Nozzle Check Valve Part # for HR 143A?
« Reply #21 on: January 15, 2013, 12:26:06 PM »
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I'm hesitant to comment on anything I don't know 100% about. I have not had these on any sleds, but have talked with some who do. I have a couple that are for a different carb though. One you can suck back and forth and get no resistance. I believe it's faulty. The other is just like a standard nozzle wher you can't suck in one direction but can the other. This is how they are supposed to be. If you can't get air one way but can the other with good pressure, I think they are ok even with one smaller. As long as it blocks the passage. I'd send you these nozzles and you could extract the fiber wafers for free if you wanted. Not sure they are the same size and thickness but I imagine they'd have to be. You would then have to carefully pry the prongs on yours open and replace them. But again, if yours seal I would leave them. Hope this helps.
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'65 Olympique
dooitvintage
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Re:Nozzle Check Valve Part # for HR 143A?
« Reply #22 on: January 16, 2013, 11:56:13 AM »
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thx Hermit. I'm trying to decide, based on extremely limited availability/non-existence of new stock, whether I should try to re-use the check valve I removed from one of the 137a's I'm rebuilding for a 73 294 motor. I could scrap the 137's but I like the 143's so much I wanted to do it again! I guess it's as simple as that: if air passes one way and doesn't the other then it should be ok. If it doesn't COMPLETELY block in the other direction, what effect will it have on function/performance? Anything noticeable?
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hermit
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Re:Nozzle Check Valve Part # for HR 143A?
« Reply #23 on: January 16, 2013, 12:16:58 PM »
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Well I can't say exactly. But to the best of my knowledge you want it to completely shut off flow.
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'65 Olympique
sledrat
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Re:Nozzle Check Valve Part # for HR 143A?
« Reply #24 on: February 13, 2014, 11:53:55 PM »
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Is it mikuni time yet  Just joking but ya
That's what I would doo
very interesting read though best of luck with that flapper nozzles
I never seen them before and they don't look like they would be to
Reliable in function to me
But then again I do not know anything about em
« Last Edit: February 14, 2014, 12:00:59 AM by sledrat » Report to moderator Logged
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