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JLO 78K 128/4382

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by Pymmie » Mon Jun 22, 2020 8:40 pm

Krusty wrote:Once all the parts were removed we took her to the local body shop were SID promptly attacked the offside rear quarter panel (muttering about bodging bast**ds, and why don't they just leave it to the experts etc etc) and told me to sod off and dont come back till he rings me :lol:

A couple of days later and here is the first priming....


I wonder how ‘Sid’ the expert reacted ?

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Mk3 Int 128/4451 - SW Area Rep (Devon/Cornwall)

Understeer - Hitting the fence with the front of the car
Oversteer - Hitting the fence with the rear of the car
Horsepower -How fast you hit the fence
Torque - How far you take the fence with you
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by Krusty » Tue Jun 23, 2020 1:02 am

to be fair he was here 20 mins after i noticed it :D
strange how it only did it on left front and rear wings so its turned round now so the sun bakes the other side this week as we are due a heat wave of sorts then see what happens.

todays project went ok-ish :oops: ....rebuild the master cylinder (i noticed damp on the servo)
wasted over an hour looking for a circlip to seperate it all and its not bloody there :roll: (note...undo the alloy neck held on with 2 phillips screws, you will find a little sprung plunger sat in a BIG IMPERIAL hex/allen screw :roll:
here you can undo it by cheating !!! sump plug removal tool fits quite nicely :lol: :lol: )

note to self....remember to buy brake fluid :? :? :?

alternator upgrade tomorrow :P
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by archie » Wed Jun 24, 2020 8:10 pm

i may have the origanal hand book for that car ill check tomorrow
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by Krusty » Sun Jun 28, 2020 11:43 pm

today eventually i got round to the alternator conversion and found some strange things along the way,

First i read the monday club stuff about connecting all 3 wires from the output pole on the alternator with a bolt then tape them up :shock: (the writer belives this cable terminates in the fuse box but it goes to the starter relay) then run a big cable between the alternator to the starter relay :?
I just replaced the big old cable with a bigger one and connected the other original smaller ones back to the output pole.
Second is the instruction that a battery light is required to create a "field" (polarity)....this is not needed as if you connect the twin connection (2 wires on the single spade) on the the correct spade terminal on the alternator you have just created the said "field" connection :D thus no need for a battery light
remember to unplug the old regulator wiring thats next to the right hand bonnet hinge (you now have a handy 12+ ignition switched live spare :) )

amazingly it would not start as i left a small 2.5mm wire off the alternator bracket so i reconnected it and it starts :lol: but it still wasnt charging above 12 ish volts, so a nice big earth went between the battery/body earth and the front manifold bolt and viola ! we are back on the road :lol:

initially it was showing 15 volts plus at 2000 rpm on my fluke tester so i then swapped the field wire to the other spade connector and JOY we get 12,8-13v at idle and maxing out to a regulated 14.8 volts at 3000 rpm !!!! result !!!! trebles all round :lol: :lol: :lol:

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by Krusty » Mon Jul 06, 2020 9:28 pm

if your trying to fill up your car and the pump keeps clicking off this is probably why.......

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we found this whilst replacing the fuel tank, delamination :shock: outer rubber then fiber lining then another layer of rubber. old age obviously set in there eh ?
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by Grant » Mon Jul 06, 2020 10:17 pm

KrustyMan :P .. I had the same thing, I found out when I filled the car to the brim one day and wondered what was dripping by my left boot!!Image It's common thing it seems, and you know the song.. "There's a hole in my bucket dear Liza dear Liza", but, the velocity of a fluid flowing through a sharp edged hole at the bottom of a tank or vessel filled to a certain height h would be the same as any object of falling freely from that height >>
>>
Hole in Bucket.jpg
Hole in Bucket.jpg (8.06 KiB) Viewed 1064 times

Now we know the relationship between velocity of an object and the height that it's dropped from can be found from energy methods, or the conversion of potential energy to kinetic energy. That is... >>
Kinetic energy.png
Kinetic energy.png (3.01 KiB) Viewed 1064 times

Now, this would apply to any object. >>
Let's assume that the object in question is simply a droplet of water amongst the entire volume of water sitting at the top of the vessel when it is filled to a height h. Now let's imagine that all of the water except this droplet is removed, so that this droplet is suspended in a vacuum at height h, and then allowed to free fall.
This suggests that the velocity of the stream of water leaking from a sharp orifice (i.e. a hole at the bottom of the tank or bucket) this the same as the free-fall velocity of this droplet of water dropped from the filled height.
And therefore, we can show and explain by >>
2gh divided by.png
2gh divided by.png (709 Bytes) Viewed 1064 times

Don't worry, if you are finding it a bit hard getting your head around this , but there are experiments that can confirm this.
Now, we can use this theory to calculate how long it takes a vessel to drain completely, because a decrease in the volume in the vessel is simply equal to the volume that leaks out of the hole.
A small volume that leaks out is equal to the velocity of the jet by the area of the hole (A0) by a small increment in time. That is...
Tri V.png
Tri V.png (1.65 KiB) Viewed 1064 times

The negative sign simply means that the volume of water in the tank is decreasing.
Now, the decrease in the tank volume is also equal to the cross-sectional area (AT) of the tank by the change in height. That is...
h4.png
h4.png (737 Bytes) Viewed 1064 times

Now equating these together, we have...
Equate together.png
Equate together.png (2.28 KiB) Viewed 1064 times

By taking the limit as h6.png, we have the differential equation...
Diff Equation.png
Diff Equation.png (2.21 KiB) Viewed 1064 times

Equation (1) is a separable, first order ODE for which we can find a general solution...
h8.png
h8.png (3.9 KiB) Viewed 1064 times

So all you have to do is replace the Filler Hose Neck and you're done Krusty My Ole FruitImage
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by Krusty » Mon Jul 06, 2020 11:33 pm

reminds me of "open university" on bbc2 back in the 80's :lol: :lol: :lol:

i dont suppose anyone knows a neat trick for fitting the passenger (left side) washer jet and pipe ? :wink:
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by Chris_R » Tue Jul 07, 2020 12:41 am

Yes, you have to peel back the insulation carefully and cut a hole. Do a search in the forum here, it's been described before somewhere.
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by Roh » Tue Jul 07, 2020 2:19 am

Grant wrote:KrustyMan :P .. I had the same thing, I found out when I filled the car to the brim one day and wondered what was dripping by my left boot!!Image It's common thing it seems, and you know the song.. "There's a hole in my bucket dear Liza dear Liza", but, the velocity of a fluid flowing through a sharp edged hole at the bottom of a tank or vessel filled to a certain height h would be the same as any object of falling freely from that height >>
>>
Hole in Bucket.jpg

Now we know the relationship between velocity of an object and the height that it's dropped from can be found from energy methods, or the conversion of potential energy to kinetic energy. That is... >>
Kinetic energy.png

Now, this would apply to any object. >>
Let's assume that the object in question is simply a droplet of water amongst the entire volume of water sitting at the top of the vessel when it is filled to a height h. Now let's imagine that all of the water except this droplet is removed, so that this droplet is suspended in a vacuum at height h, and then allowed to free fall.
This suggests that the velocity of the stream of water leaking from a sharp orifice (i.e. a hole at the bottom of the tank or bucket) this the same as the free-fall velocity of this droplet of water dropped from the filled height.
And therefore, we can show and explain by >>
2gh divided by.png

Don't worry, if you are finding it a bit hard getting your head around this , but there are experiments that can confirm this.
Now, we can use this theory to calculate how long it takes a vessel to drain completely, because a decrease in the volume in the vessel is simply equal to the volume that leaks out of the hole.
A small volume that leaks out is equal to the velocity of the jet by the area of the hole (A0) by a small increment in time. That is...
Tri V.png

The negative sign simply means that the volume of water in the tank is decreasing.
Now, the decrease in the tank volume is also equal to the cross-sectional area (AT) of the tank by the change in height. That is...
h4.png

Now equating these together, we have...
Equate together.png

By taking the limit as h6.png, we have the differential equation...
Diff Equation.png

Equation (1) is a separable, first order ODE for which we can find a general solution...
h8.png

So all you have to do is replace the Filler Hose Neck and you're done Krusty My Ole FruitImage


I think you are trying to over-simplify this problem as you have neglected to consider large holes, coefficient of discharge and viscosity.
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by Roh » Tue Jul 07, 2020 2:21 am

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by VFK44 » Tue Jul 07, 2020 2:39 pm

Grant, you lightweight, you've completely ignored the Coriolis effect, and which hemisphere of the globe you are in. Besides, the lack of any emojis sprinkled between the equations makes me suspect this is not entirely your own original work. :roll: :lol:
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by Joe Schiavone » Tue Jul 14, 2020 6:22 pm

Cannonball. I beg to differ with your statement about painting panels off car causes them to miss match color. The mis match in color is the painters doing. If the paint is mixed and stirred prior to spraying and the panel is positioned the same as on the car as well as sprayed if on the car all else the same as all at once. You see painting to get a color match ex actor has to do with painting exactly the same air pressure distance and wetness all contribute. My Pebble Beach Best of Class was all painted apart. PB Show in the US is the best there is. Again all of my Refinishes are painted apart. RacerJoe
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by cannonball » Wed Jul 15, 2020 10:55 am

Joe Schiavone wrote:Cannonball. I beg to differ with your statement about painting panels off car causes them to miss match color. The mis match in color is the painters doing. If the paint is mixed and stirred prior to spraying and the panel is positioned the same as on the car as well as sprayed if on the car all else the same as all at once. You see painting to get a color match ex actor has to do with painting exactly the same air pressure distance and wetness all contribute. My Pebble Beach Best of Class was all painted apart. PB Show in the US is the best there is. Again all of my Refinishes are painted apart. RacerJoe



Sorry i disagree, i see that many cars that have been painted with items not on the car eg doors/ trunk, hood, and the mismatch just hits you, paint it as a complete car you can not go wrong a real guy can back mask the door shuts etc so no blow through or dry edges the car will look right..

and to be fair Joe those pebble beach judges are getting on in years and should maybe have gone to spec savers,,, :shock: :shock: :shock: :shock: :D :D :D :D :wink: :wink: :wink: :wink:
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by Joe Schiavone » Wed Jul 15, 2020 3:31 pm

Cannonball You are missing the point. The mismatch in color is a result of not paying attention to Wetness to distance from the spray gun to the pannel. To the orientation of the pannel in relation to how it is being sprayed air pressure A fender skirt can not easily be sprayed to match a 1/4 pannel color being sprayed on the top of a table. I once got a sun roof panel for a 930 Porsche in silver. For a repair. Did the work got a table placed a large box on the table to replicate the height of the roof and the distance I would need to be away from the panel. All necessary to get the correct appearance. The eye is a very critical human computer there was a reason why people would come hundreds of miles to get us to correct color matches others could not. It is all in the details others do not realize. RacerJoe
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