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I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
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Distributor Vacuum Advance
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Fri, 26 July 2002 11:37
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i heard that with cars that run webbers you should disconnect the vacuum hoses to the distributor and run without them does anyone know if this is correct or not?
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Distributor Vacuum Advance
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Fri, 26 July 2002 12:28
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I'd be interested in hearing about this! I have a webber on my TA22 but I still have the vacuum hose connected!
I dont see what removing this would do, apart from making it pretty shitty to drive!
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I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
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Re: Distributor Vacuum Advance
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Fri, 26 July 2002 12:53
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well from what i know is you adjust the timing with it disconnected and leave it disconnected with all the pipes blocked off and its meant to improve power in the higher rev range except i just want to know if its true or not
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Location:
Tasmania
Registered:
May 2002
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Re: Distributor Vacuum Advance
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Fri, 26 July 2002 14:38
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In the higher rev range (under load), your vacume advance will not be working anyhow, so it does not effect max power, and was never ment to. The vacume advance improves take off torque, when the throttle is only partly open. Its best to leave it on I think, as the vacume advance should improve drivability. People that take it off don't understand what its for.
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Location:
Finland
Registered:
June 2002
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Location:
Tasmania
Registered:
May 2002
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Re: Distributor Vacuum Advance
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Fri, 26 July 2002 17:40
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They are some good thoughts 5K. Maybe if we got vacuum off more than one carbie? this would even the pulses and give more vacuum. I have a standard ballance tube on my 2TG, and it is running nice. Can I connect the vacuum advance to the ballance tube for full manifold vacuum? Or does the distributor need vacuum right at the throttle?
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Location:
Finland
Registered:
June 2002
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Re: Distributor Vacuum Advance
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Fri, 26 July 2002 19:29
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I have read that there are two types of vacuum advance dizzy arrangements. One works with full vacuum advance (i.e. vacuum outlet is from well below carburator butterfly). The other has no vacuum at idle, but even a slight throttle opening will open up vacuum outlet port, and vacuum is led to distributor.
The latter is more common.
No wonder why on Dell'orto and Weber carburators have vacuum outlet _above_ butterfly when it's at rest position.
Without knowing your distributor type, I feel confident saying your dizzy does not like any vacuum at idle.
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These are not my opinions/findings I loudmouth here, just being booksmart.
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Registered:
July 2002
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Re: Distributor Vacuum Advance
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Sat, 27 July 2002 05:29
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i have a 2tg and the diaphragm on my vacuum advance is punctured where can i get another one?, can i get a new one? no vacuum advance makes the car less responsive at take off, a rougher drive at low revs. Although at full throttle your dizzy will advabnce anyway, so this is only annoying at low revs.
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Location:
Tasmania
Registered:
May 2002
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Re: Distributor Vacuum Advance
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Sat, 27 July 2002 08:42
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I had the same problem. I used a good diaphram off a 18R-C or 4K distributor, and if it wasn't quite right I machined some part off it on the lathe, and cut and filed other bits to suit. It works, but I'm not sure how much it advances with the low vacume off one cylinder. I will go and see now.
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Distributor Vacuum Advance
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Sat, 27 July 2002 08:57
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im having the same fun at the moment with mine - 45 mill webers dont have any vaccum hoses or anythitng off them to draw vaccum for the distributor advance anyway ..
best way to overcome issues here i believe is to get the dizzy regraphed - and mechanically advance your timing to some degree ..
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