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Ran into this last year on a friends circle track (Mopar) effort. Mid season an MSD box was installed due to ingition issues---Ran the whole season with sluggish performance that did not match the expectations---Checked the timing with 3 races to go and found out it was 8 yes EIGHT degrees retarded! Of course the last 3 races were rained out so we can only speculate --coulda/woulda/shoulda. You should observe a retarded timing condition. J.Rob



Help a guy out here. Are you saying with just a box change the timing will change? Educate me, how could the timing change if the distributor wasn't moved? The box does something to the timing even though the distributor isn't moved? How would you set the timing then?


And to answer your second question you advance the timing by advancing the distributor, you just need to send the signal sooner to the MSD so the plug fires when you want it to. IE, you need to account for the delay due to additional MSD processing.



Ok, so for the sake of discussion, I set the total timing to 36, you are saying I need to set for say 37 or 38 to allow for the delay? Or if I wanted 18 initial, set it for 20 or 21? How do you figure what the delay is? I may be making this harder than it is.