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MG MGB Technical - V8 electronic ignition

Starting to put the engine back together and back into the car. Today I was cleaning up the distributor and thought I would check the vacuum advance. Using the tried and tested method of sucking the tube and putting my tong over the pipe to see if the vacuum remained. I was unable to create a vacuum so the unit needs to be replaced. The dissy is fitted with Lumenition electronic so I thought does the vacuum advance need to be replaced.
Your thoughts greatly received
a goldup

The Luminition is a points replacement device. It does not have any effect on the basic mechanical and vacuum advance systems. If your vacuum advance can is bad, it needs to be replaced.

Les
Les Bengtson

Correct, and very expensive they are too, although the criteria for replacement is if you can suck air *from* the capsule, i.e. through the diaphragm. It may be that you simply aren't sucking hard enough.

After replacing mine twice I realised the problem was fuel running down from the carb port, which is on the bottom of the throat, into the capsule and rotting the diaphragm. I constructed a small separation chamber which is mounted slightly above the carb port. Any fuel that gets as far as the chamber simply runs back to the carb, and none gets down to the capsule. Been fine ever since - http://www.mgb-stuff.org.uk/ignitiontext.htm#v8vac
PaulH Solihull

Damm you are right £64.75 from SCParts. MGOC list as NLA. Rimmer Bros list a replacement for 608194 as UKC1674 £48.95. Does any body have any experience with Rimmer Bros as I have not come across them before.
a goldup

I always go to Clive Wheatley first - 01746 710810.
PaulH Solihull

Rimmer and Clive are both very good news.
R Walker

Off to see Clive tomorrow as he has one in stock
a goldup

Mr Goldup,
I have fully mapped ignition on my V8 and I happen to have a brand new vacuum module if you want it. say a tenner plus postage call me on 01 929 553952.
Hi Paul long time no speak. Let me know if you are interested in how I did my mapped ignition. Its easy - but not cheap,
Bob

bob p

Thanks Bob
Purchased one from Clive last week thanks for the offer.
It would have saved me £40.00
a goldup

Hi Bob - thanks for the offer, but standard is good enough for me. I'd be happy if I could get rid of the hot tapping!
PaulH Solihull

This thread was discussed between 14/10/2010 and 28/10/2010

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