VK Dizzy

[85berlina]

Hi guys
A few threads back I asked how to adjust my ignition timing and Slim told me how to. I did this and now it is going very very good.
Thanks a lot Slim.
Anyway, I have a black motor that has a blue motor distributor and anything else necessary but it still has the stock VK carby in it. The VK carby doesn't have a vacum port for the spark advance and mine is just connected right up to the manifold.
So, I was just wondering, on commodores with blue motors where the distributor connects up to the carby, is full manifold vacum applied to the spark advance system?
Thanks guys

[Goon]

Is the blue dizzy line connected as the vaccum advance system.. yes "spark? must be a black motor thing"

[vkberlina]

Ok Hook up the vac advance the same as a VH, see the attached diagram you will need a 40deg C TVS for the engine block, 104deg C TVS mounted in the thermostat housing or head also a 15degc TVS in your air cleaner.

Basically is the coolant temp is above 104deg full vacume advance is allowed, if the air intake temp is above 15deg ported/restricted advance is allowed, if its below 15deg but the bloc is above 40deg it will also allow ported/restricted advance but if the block is below 40deg then vacume advance is not allowed.

cheers
Scott

[85berlina]

Sorry Goon,
When I say spark advance, I mean the vacum advance. (I'm a bit used to the terms used with really old cars).


So, Scott, having the vacum advance connected directly to the manifold isn't a good thing.

It is actually accerating very good, I just noticed how it was connected last time I was working on it and was just asking.

Thanks for the help.

[vkberlina]

it will work, it just wont be the best way to have it thats all