Electronic boost retard?
Hey guys, I have this Mallory 685 ignition box that has an optional plug on it for a MAP sensor. I guess you connect a vacuum line to the MAP sensor to read boost and you can retard a selected amount per lb of boost.
Would this be a good way to control the timing?
Here are whats in the instructions:
Mode 8 - Boost timing retard degrees per PSI of boost. If you have an optional MAP sensor connected, the HYFIRE┬« 685 will retard the timing as the boost pressure increases. Mode 8 tells the system how many degrees to retard the timing for each pound of boost. The MAP sensor plugs into the 3 wire connector that comes out of the front panel.
Mode A - MAP sensor select. There are two MAP sensors available that are compatible with the HYFIRE┬« 685. One is a 2 Bar sensor (Accel P/N 74776), which is good for about 15 PSI of boost, and the other is a 3 Bar sensor (Accel P/N 74777), good for about 30 PSI of boost. Use mode A to tell the HYFIRE┬« 685 which sensor you are using. If you dont have a MAP sensor installed, this function has no effect.
Twin turbo 94 cobra in the making.
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