Author Topic: How come we don't all install in-line fuel valves to block hydolock?  (Read 28121 times)

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Offline connie_rider

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #250 on: August 08, 2017, 07:14:06 pm »
m in sc, I kinda question your statement?

The reality of the max requirement is  = or > than the flow capacity of ( the main and pilot jets per carb, which will be less than the float needle seat per carb) x4. That's just the way it works on a gravity feed system.

I agree that flow thru the float needle seat per carb is gravity feed. But the Jetts have a vacuum on the back side of the jett.
 I would think that makes that flow thru the main jets, a pressure feed? (approx. 14.7 psi)

MOB: I think the fuel line ID is about 5/16".
         But the size of the fuel line is not the fuel restriction.
         The limiting diameter is inside the petcock, or (if smaller) inside an add-on valve.

Harry sed the port size in the stock petcock is 1/4".
 That surprise's me a little.
I thought the orifice size in the petcock (at the selector valve itself) was smaller than that.
  Guess I'll have to open my spare petcock and check Harry's dimensions..

The point is; These guys have successfully used various valves to stop fuel flow for multiple years..
                    So, we can't say their idea's didn't work.
                      I guess it's possible that they haven't rode long and hard e'nuff for fuel restriction to be a problem?
                      But, I suspect they've thrashed their bike's {at some point} to check things out.

Again; I'm not interested in using a {additional} valve for preventing hydrolock.
          That's already solved with the overflow tubes.
I'm only looking for a way to stop petcock leakage while stored.

I'll add that if you stop petcock leakage, hydrolock is far less likely.

Ride safe, Ted
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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #251 on: August 08, 2017, 07:41:57 pm »
Yeah Ted... that's why I implied, jokingly, about the fuel line size... because its 5/16"..... and kinda throws off the 1/4" barbed fitting theory in my mind.
I just figured "let it flow.." and didn't say anything. :rotflmao: :)

Liquids flowing via gravity, thru a circuit, reduce in flow and increase in pressure when the encounter a reduction in cross section.
The opposite occurs when a smaller diameter turns into a larger diameter, flow increases and pressure reduces.
When this occurs in multiples in the same circuit, large to small to large to small to large again, the effect, especially if ocurring in a fairly short length of circuit, wreaks havoc on calculations.  Just mentioning that.

I do agree that "if it works for someone, its fine".... for the person its working for. :great:

Edit...darned spell check changes words to other words... but never corrects my poor spelling...heheheh
« Last Edit: August 09, 2017, 06:36:17 pm by MAN OF BLUES »

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Offline m in sc

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #252 on: August 08, 2017, 07:45:29 pm »
basically, yes, you are right... i didn't want to get too deep into it, but.... i have to size this stuff with my 2-strokes all the time.  its not pressure feed, but pulled through by a pressure drop. still... the point being is it will never exceed the the ability of the needle seats to flow in a gravity situation. which is being pushed by a column of fluid above it. (there is no pressure increase here.. column height is column height) the main jets can not exceed this. If they do, you need to upsize the needles and seats, have had to do this on some very high hp setups on the old stuff. (up to 3mm). this is why i didn't bother with giving diameters of the jets, which is usually in stock applications about 45-50% of the flow provided by the needle and seat at max. (keihin and mikuni follow this general rule of thumb when sizing).   

please, keep in mind, this is NOT an argument against vent over flows or the electric solenoid.


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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #253 on: September 18, 2017, 12:30:40 pm »
I have to question all the flow rate theories, at least on my C10.

This morning on the way to work traffic dictated a brief "well over the Ton" stint.  >:D
I had forgotten that that I needed gas, less that 5mi later I filled the tank with 6.7G that's less than a gallon left and I didn't feel any fuel starvation during my rapid forward progress.  :nananana:
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Offline Mettler1

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #254 on: September 18, 2017, 04:43:03 pm »
I have to question all the flow rate theories, at least on my C10.

This morning on the way to work traffic dictated a brief "well over the Ton" stint.  >:D
I had forgotten that that I needed gas, less that 5mi later I filled the tank with 6.7G that's less than a gallon left and I didn't feel any fuel starvation during my rapid forward progress.  :nananana:

   AAAAH!! Just TOO much fun!! :great: :great:
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Offline Mcfly

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #255 on: September 18, 2017, 11:07:23 pm »
I have to question all the flow rate theories, at least on my C10.

This morning on the way to work traffic dictated a brief "well over the Ton" stint.  >:D
I had forgotten that that I needed gas, less that 5mi later I filled the tank with 6.7G that's less than a gallon left and I didn't feel any fuel starvation during my rapid forward progress.  :nananana:

And the question is???   ;D
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Offline Rev Ryder

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #256 on: September 19, 2017, 02:07:09 am »
I have to question all the flow rate theories, at least on my C10.

This morning on the way to work traffic dictated a brief "well over the Ton" stint.  >:D
I had forgotten that that I needed gas, less that 5mi later I filled the tank with 6.7G that's less than a gallon left and I didn't feel any fuel starvation during my rapid forward progress.  :nananana:


And the question is???   ;D

It's really quite simple....


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Offline connie_rider

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #257 on: September 19, 2017, 09:57:33 pm »
Look carefully. I see a mistake in the first part of his equation.
 First big box, right side, on the 3rd row.

Ride safe, Ted
« Last Edit: September 24, 2017, 04:31:52 pm by connie_rider »
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Offline rick

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #258 on: September 23, 2017, 09:17:24 pm »
Rev - where did you get that picture of me?  My Mom?

Offline Mettler1

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #259 on: September 24, 2017, 03:17:24 am »
Look carefully. I see a mistake in the first part of his equation.
 First big box, right side, on the 3rd row.

Rode safe, Ted

   Ted, you are either a genius or "full of it"!   :) :)
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Offline connie_rider

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #260 on: September 24, 2017, 04:33:28 pm »
Naw, it's neither of the 2 options you mentioned.
It's option #3;   "I lie"!!

Ride safe, Ted
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Offline Mettler1

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #261 on: September 24, 2017, 08:32:32 pm »
Naw, it's neither of the 2 options you mentioned.
It's option #3;   "I lie"!!

Ride safe, Ted

   I'll buy that!! >:D
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Offline Mcfly

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #262 on: September 25, 2017, 01:18:21 am »
Naw, it's neither of the 2 options you mentioned.
It's option #3;   "I lie"!!

Ride safe, Ted

   I'll buy that!! >:D

Geez, I really thought he forgot to carry the 1...   ;)
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Offline connie_rider

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #263 on: September 25, 2017, 02:30:02 pm »
Shhhhh, He did forget to carry the 1.   :67:

But, don't tell Mettler.
    He thinks I lied..   
Bekuz, I lied, when I sed,, "I lied"..  <sneaky grin>  :19:

Ride safe, Ted
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Offline Mcfly

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #264 on: September 28, 2017, 12:26:56 am »
Shhhhh, He did forget to carry the 1.   :67:

But, don't tell Mettler.
    He thinks I lied..   
Bekuz, I lied, when I sed,, "I lied"..  <sneaky grin>  :19:

Ride safe, Ted

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Offline Rev Ryder

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #265 on: October 04, 2017, 02:26:37 am »
Look carefully. I see a mistake in the first part of his equation.
 First big box, right side, on the 3rd row.

Rode safe, Ted

   Ted, you are either a genius or "full of it"!   :) :)

Surely the latter and not the former.
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Offline connie_rider

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #266 on: October 04, 2017, 03:09:14 pm »
Yupp, I'm full of it.  {Wizdom}  ;)

Ride safe, Ted
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Offline Rev Ryder

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Re: How come we don't all install in-line fuel valves to block hydolock?
« Reply #267 on: October 06, 2017, 12:23:16 am »
 :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[
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