02GF74
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| posted on 26/10/07 at 12:52 PM |
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DIY carb gauge
Ok you clever and ingenious people, who has made their own carb balancer?
(for dcoe 40s)
It should be possible using 1/2 a squash ball and a clear plastic ube - the tricky part I can't figure out is how to put some bead or floater
into the tube and display the pressure.
Or go high tech and use a pressure sender or heated wirre?
(I'm getting deja vu for some reason - have I asked this before or was an example posted before or is it just getting close to a full
moon????)
[Edited on 26/10/07 by 02GF74]
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Howlor
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| posted on 26/10/07 at 01:34 PM |
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What about some flexible tube to push up to the trumpet. Then connect this to a straight piece of clear tube that is big enough to put a ping pong
ball in. Have this mounted vertical on a piece of wood and allow an open end to it, possibly need a nail across the open end to stop the ping pong
ball dropping out when you switch of the engine or it goes bang.
You can then mark on the tube how far the ping pong goes up when you pop it on each trumpet.
Disclaimer - Don't come crying to me when your Tom's ping pong has just blown up your Hayabusa lump when the suction took it all the way
into the engine!
Steve
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v8kid
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| posted on 26/10/07 at 01:51 PM |
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I just use a piece of rubber tubing to listen to the hiss. When I compared it to a pucca balancer it was spot on.
Suprising the difference in hiss with even a little change in butterfly setting
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thomas4age
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| posted on 26/10/07 at 02:50 PM |
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take 4 identical glas/plastic U shaped measuring tubes from your kids chemistry class (sure he can nick a few whaha otherwise buy them or make
them)
take 4 pieces of small vacuum tube
take 8 wine bottle cork's and drill a hole in them to take the tubes.
now connect the tubes to each throat balancer-pipe (small pipe below the carb almost every has those even ITB's)
put the corks in the measuring tubes after you've filled them with exactly the same amount with water block the other side of the tube with the
remaining set of corks
start the engine.
screw just as long as all tubes display the same amount of rise of level in the tubes
take a normal MAP sensor to aquire the actual vacuum, most bosch ones have their resistance diagram online, you'd only need a multimeter.
grtz Thomas
[Edited on 26/10/07 by thomas4age]
If Lucas made guns, Wars wouldn't start either.
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02GF74
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| posted on 26/10/07 at 02:53 PM |
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thanks thomas but you missed the part that these are side draught DCOE; There is only one vacuum pick up for the distribututor so only 1 barrel can be
measured.
I need something that fits across the open barrel, liekk t he gunsons one
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thomas4age
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| posted on 26/10/07 at 03:10 PM |
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fair enough
so you would only measure one barrel at a time?
even easier, get a gummyball (a childrens bouncy-ball thingy don't know what's it called in english)
drill a hole through that put the vacuum pipe in it and make sure it doesn't leak (blue gasket sticks to that)
Now you have a ball that can't go though the barrel (safe) but can be used to close the barrel completely with some presure aplied. (otherwise
with some stiky grease)
you only need on of the glas measuring vacuum tubes now, or make 4 and have a real handsfree balancing set-up
grtz Thomas
[Edited on 26/10/07 by thomas4age]
If Lucas made guns, Wars wouldn't start either.
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britishtrident
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| posted on 26/10/07 at 04:21 PM |
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Puka carb balancers identical the the old Crypton Schrometer are actually pretty cheap compared to the awfukl G______n carb balancer thing.
Actually 40DCOEs are really ease to balance accurately with a bit of heater hose used as a stethoscope, much easier than SU or Zenith-Stromberg CD
carbs.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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britishtrident
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| posted on 26/10/07 at 04:25 PM |
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quote:
Originally posted by 02GF74
thanks thomas but you missed the part that these are side draught DCOE; There is only one vacuum pick up for the distribututor so only 1 barrel can be
measured.
I need something that fits across the open barrel, liekk t he gunsons one
I think you miss the point the tube is used to listen for the "hiss" at the carb bellmouths --- always hold in exactly the same relative
position for each carb barrel.
An ancient skill but easy when you know how.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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rusty nuts
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| posted on 26/10/07 at 05:57 PM |
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I tend to use a mechanics stephoscope ? with the metal probe section removed, cheap as I already had it and useful for findings noises
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Confused but excited.
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| posted on 26/10/07 at 07:16 PM |
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quote:
Originally posted by v8kid
I just use a piece of rubber tubing to listen to the hiss. When I compared it to a pucca balancer it was spot on.
Suprising the difference in hiss with even a little change in butterfly setting
Can also be used to identify snakes, with a little practice. 
Tell them about the bent treacle edges!
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britishtrident
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| posted on 27/10/07 at 02:00 PM |
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http://www.holden.co.uk/displayproducts.asp?sg=3&pgCode=095&sgName=Maintenance&pgName=Tools&agCode=0826&agName=Carburettor+Adjusti
ng+Tools
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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