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For running a turbo, what will the J&S replace? I know you won't need a boost timing retard device like the MSD, but what else does the J&S cover. MAP sensor, a/f ratio, anything else???
~Andrew
 

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The j&s is used to retard timing (no msd boxes needed). To my knowledge, that is all it does. You're using it to tune with, and prevent knock ... thats about it. I've been looking into getting one. I'm not sure about one thing... does it use the stock o2 sensor, or do you replace yours with the wide-band? Or do you buy the wide-band as an after sorta deal?
 

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The J&S Safegaurd is a knock sensor/ignition retard. It retards your timing if knock is detected. Also, you can use it as a boost retard. Every boosted lude should run one of these.
You have no idea how often you are detonating even though you can't feel or hear it.
 
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