Ignition module again

stina

stina

New Member
Hi Folks .
Went to see my mate Jules today . He posts here occasionally when his carer helps Him .
He has an early S2 V8 that he rescued from the island of forgotten toys . He has posted before with hot restarting issues , and decided to go for a powerspark ignition module to rule out any points/condenser issues . I was intending to get over during the Holls and have a look . Due to other commitments and the weather i never made it until today .
In the meantime another friend of ours ( with a rather nice 2000 TC He's restored ) had a look . The upshot being the module only looks like it'll fit with the advance plate removed :? I seem to remember reading of this before , but not really taking it in as mine has the later dizzy and fitting the kit was simple . Something about drilling the base plate :? :?
I can talk to Simon at BBC in the week but wondered if any of you Guys could shed light in the mean time ?
I took a pic of the dizzy on another old beast slumbering in His resting Home , Series one V8 but same Dizzy .
Phone pic , it's only taken me 3 years to get pics from fone to lap top , good eh !
I set it up on points again so it'll run for now so as to keep the old lady usable :D
 

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O.k folks . Still trying to work this out in my head before i talk to the supplier . How does the vacuum advance work on the earlier dizzy ? it looks like you have to remove the triangular base plate to fit the kit on this dizzy from the pictures on the suppliers question page , Would the vac advance still work ? ( does it operate by rotating the lower plate ? ) Is there more mechanical advance with this earlier dizzy and less vac advance ? I have been looking at the Dizzy in the workshop parts book , but the car is 10 miles away , hence the questions , i can't pop out and have a look :?
This link might help explain what i mean
http://www.simonbbc.com/faq-page/#link9
:D
 
One type the end of the vac rod is located by the pin on the bottom of the points, on the other type the end of the vac rod is on a pin sandwiched between the two parts of the baseplate, so the baseplate has to be split to remove it.
 
stina wrote,...
Is there more mechanical advance with this earlier dizzy and less vac advance ?
Click to expand...

Hi Stina,

All distributors will always deliver more mechanical advance than vacuum advance, but if you are comparing this early distributor with the one in your car, then yours will deliver less total mechanical advance and less total vacuum advance.

In terms of actual figures, the early distributors left the factory with an absolute maximum of 28 degrees of mechanical advance (as measured at the crankshaft) built in, which is rather less than ideal, whilst the vacuum advance delivered a maximum of 16 degrees (as measured at the crankshaft). The actual degrees when measured at the disributor will be one half of those figures.

Ron.
 
harveyp6 said:
One type the end of the vac rod is located by the pin on the bottom of the points, on the other type the end of the vac rod is on a pin sandwiched between the two parts of the baseplate, so the baseplate has to be split to remove it.
Click to expand...
Hi Harvey . I'm assuming that you mean the type with the location pin on the bottom of the points is the later dizzy as i have on mine ? on the type i have pictured above the vac rod is sandwiched between the top and bottom part of the base plate ? Which part does the vac rod /unit move to advance the timing as it looks like the only way to fit the electric module is to do away with the triangular part of the assembly ( as pictured in the questions page of the simon bbc site ) and fit the mobule to the lower part of the plate . But would this render the vac advance inoperable ?

Ron i'm not interested in the advance stats at the moment other than is the total advance on the earlier dizzy made up of more mechanical and less vacuum advance compared to the later type , hence loosing the use of the vac unit operation not being seen as a problem with the ignition module fitted . i can't see much room for the base plate to move in the earlier dizzy looking at pics and drawings in the books with the way that sprung pin connects the two parts of the plate . As i said the car is too far away to look at the moment :?
 
stina said:
Hi Harvey . I'm assuming that you mean the type with the location pin on the bottom of the points is the later dizzy as i have on mine ? on the type i have pictured above the vac rod is sandwiched between the top and bottom part of the base plate ? Which part does the vac rod /unit move to advance the timing as it looks like the only way to fit the electric module is to do away with the triangular part of the assembly ( as pictured in the questions page of the simon bbc site ) and fit the mobule to the lower part of the plate . But would this render the vac advance inoperable ?
Click to expand...

There are three types of points. The early small set. Then the larger ones, one without the pin, where the vac rod is sandwiched between the two parts of the baseplate, and the ones with the pin on the bottom that goes directly into the end of the vac rod.
I've not heard of dismantling the baseplate to fit electronic ignition, and I would expect the vac advance to be retained and functional on anything I fitted.
 
[/quote]

There are three types of points. The early small set. Then the larger ones, one without the pin, where the vac rod is sandwiched between the two parts of the baseplate, and the ones with the pin on the bottom that goes directly into the end of the vac rod.
I've not heard of dismantling the baseplate to fit electronic ignition, and I would expect the vac advance to be retained and functional on anything I fitted.[/quote]

That's what i would of thought , i think a phone call needed now to sort it out :?
Cheers . :D
 
My '72 3500S has that type of baseplate in the distributor and I had no issues fitting electronic ignition (Pertronix Ignitor) with no need to remove anything but the points and condenser.

Dave
 
Thanks All . I think i have it sussed now . The kit my Man was sent is for a Rolls V8 which has a similar 35D dizzy . but with no vacuum advance , hence no triangulated part to the base plate . That is where my confusion set in , the module sent would fit with the triangulated bit removed , but then you would loose the vac advance mechanism . Not a problem on the roller as it doesn't have it . So basically the wrong bit sent :D It's amazing how difficult you can make something easy if you put your mind to it :LOL:
 
stina said:
The kit my Man was sent is for a Rolls V8 which has a similar 35D dizzy . but with no vacuum advance ,
Click to expand...

I suppose if you can afford a Roller, you don't need any help from an economy device....
 
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