se7ensport
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| posted on 5/5/12 at 07:08 PM |
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Balancing ITB's
I have an airflow meter, but getting it in a position that I can read and change the balance screws is a real challenge. So I was thinking about
taking the manifold off and balancing them on the kitchen table using a vacuum cleaner to provide a constant flow. Any reason this wouldn't
work well?
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lsdweb
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| posted on 5/5/12 at 08:10 PM |
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quote:
Any reason this wouldn't work well?
I think that if you add the word 'wife' to 'kitchen table' and 'vacuum cleaner' you may find a reason why it
won't work!
Not very helpful I know!
Wyn
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Toltec
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| posted on 5/5/12 at 08:19 PM |
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quote:
Originally posted by lsdweb
quote:
Any reason this wouldn't work well?
I think that if you add the word 'wife' to 'kitchen table' and 'vacuum cleaner' you may find a reason why it
won't work!
Not very helpful I know!
Wyn
and take another from Mrs Toltec
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se7ensport
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| posted on 5/5/12 at 08:46 PM |
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Fortunatley my wife is used to this by now, de-gunking a sump in the bath when we first got together pretty much set her expectations!
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austin man
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| posted on 5/5/12 at 08:48 PM |
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could I share your wife please, putting overalls on in my house is a no no lol
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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pjay
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| posted on 5/5/12 at 08:49 PM |
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Love the responses!
Is it possible to remove the trumpets instead (just thinking that would be less hassle than remove the inlet)?
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se7ensport
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| posted on 5/5/12 at 09:07 PM |
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Incredibly it's less hassle getting the whole set-up off v's taking the trumpets off, also due to the wings I can't see the guage
without looking through the wheel arch.
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Strontium Dog
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| posted on 5/5/12 at 11:18 PM |
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Have you got something you have to hold over the inlet? If so, bin it and make yourself a decent manometer out of aquarium pipe, some aquarium valves
a few T's and a bit of ply. You can then plug into the ports on the tb's and see all four at once. Google diy manometer or diy carb
balancer. There's loads of links and you'll soon get the idea. Very locost and completely accurate! 
http://s187.photobucket.com/albums/x319/zephyr2000/General%20forum%20uploads/?action=view¤t=3DEngine.mp4
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whitestu
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| posted on 6/5/12 at 08:29 AM |
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Do the ITBs have a vacuum take off?
If so invest in a Morantune balancer. The cost a few quid but work brilliantly.
Stu
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se7ensport
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| posted on 6/5/12 at 08:51 AM |
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Yes my TB's have a vacuum take off and borrowing a inlet gauge, making a manometer looks pretty simple which I'll do to get it set quickly
today and order a proper one on Tuesday. The Morgan Carbtune Pro seems to get the best reviews and isn't going to break the bank for the
convenience that it provides.
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Strontium Dog
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| posted on 6/5/12 at 10:05 AM |
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Once you've made a manometer I doubt you'll want to waste your money on a set of gauges that'll be no more accurate. In fact, if the
particular Bourdon gauges used aren't well matched to each other they could be less accurate than a diy one. The level of the fluid in the tubes
does not lie! I have balanced many carbs and a few TB's like this over the years and it really is one of those things were the simplest thing
works best.
A Bourdan gauge is merely a coiled tube that tries to straighten out under pressure/vacuum which in turn swings a needle. Water, or even better in
this case alcohol (I use methanol with a little food coloring in it) levels are accurate to the curvature of the earth so pretty hard to beat!
To help you you usually need to balance the tb's as two pairs, left pair and right pair, then balance the two pairs together. Don't skimp
by not fitting the aquarium valves or you could suck the fluid out of one of the tubes if your tb's are very unbalanced. Start with all four
valves closed and open them just enough that they start to effect the fluid levels and your away!
Don't forget to keep checking your tick over as it will change as you set the tb's.
[Edited on 6/5/12 by Strontium Dog]
http://s187.photobucket.com/albums/x319/zephyr2000/General%20forum%20uploads/?action=view¤t=3DEngine.mp4
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