Dual carb set ups - ?
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11-13-2006, 03:15 PM
Post: #8
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eight-six Wrote:Am I right in thinking that with a ignition control unit like the MSD 6AL I could bin the ECU and the MSD would control the timing (advance / retard for maximum performance). Cant really find a huge amount about these sorts of set ups?The MSD 6AL is just a CDI (capacitor discharge ignitition) add-on and still needs an external trigger signal from some other system which controls the ignition advance. So it alone would still not allow the ECU to be removed. At least here in Finland, rallycars with carbs frequently use a modified vacuum advance 4K/5K distributor for ignition. I believe S.K. on this forum has done this - he might be able to tell how it's done. These distributors can also be used for triggering the MSD 6AL. I'm also going to be using carbs on my car and am currently working on building a stand-alone ignition computer using a PIC16F84A microcontroller. The first version will use only RPM as a parameter for looking up the advance angle from a table, so it won't be an optimal solution - more like a centrifugal advance mechanism with a twist. But it will allow the ECU to be removed and uses the OEM distributor, igniter and coil. I'll probably extend it to use 2D tables later on and add a TPS for the other parameter (at which point I'll also need to change to a microcontroller with an A/D converter). |
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Messages In This Thread |
Dual carb set ups - ? - eight-six - 11-13-2006, 12:31 PM
[] - firehawk - 11-13-2006 03:15 PM
[] - jamiemirror - 11-14-2006, 04:51 PM
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