Ignition Introduction
As a starting point, I tried to use Alien logging via the secondary trigger to learn what the dizzy actually does. This wasn't very successful due to a couple of factors...
- Alien logging was broken in the firmware I am using. I got something working, but I don't trust it all that much...
- The vac advance on the TVR distributor is not all that sensible - it has a delay in it, meaning that a given RPM and manifold pressure is not enough to say what the total advance should be.
[Add 1D table]
I do have an approximate ignition map from this, based purely on RPM which will do to start with. I will then apply "vac advance" as required during mapping. The new scheme should prove much more successful than the original system. (I will eventually get the car to do more than 20 miles to the gallon on local roads, even if I have to push it!!)
Ignition Hardware and Wiring
I have ordered 8 coilpacks from http://www.034motorsport.com/ in the USA.
Possibly worth thinking about stocking them in the webshop for those of us who don't have coilpacks in the car as standard? Even with tax and stuff paid, they should only cost 50 euros or so. (Maybe less if they're bulk ordered.)
[Pics: Urgent addition!!]
The first job is to get some brackets made up to support the coils. They will be placed on the left hand rocker cover, as this is the only flat space I have left in the engine bay! (The right hand side will be used for the twin throttlebody plenum)
I hope to get the brackets machined from aluminium this week.
[Pics]
Coil Polarity
There is a turret for the HT lead and a 3 pin connector on the coil. The 3 pin connector contains ground for the secondary and both the primary connections.
No wiring instructions were supplied, so coil polarity will be worked out by either guessuing or applying a step change of voltage to the secondary and seeing which way the primary voltage moves... It does make a difference if the polarities are correct - the centre of the plug electrode should be +ve wrt the engine block. Q Is this correct?
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