jeff48

According to my reading, the J&S Safeguard will not protect against "hot spot" detonation, overboost or bad gas (low octane). It would appear that the only detonation the company claims the unit can protect against is the "lean condition" variety. As a result of the reading I have two questions:

1. How can any microphone based unit discriminate between the cause of the knock? It would be logical that while hot spot and overboost might cause high intensity "spike" types of detonation that the retardation of the spark could not affect in time to protect, the "lean condition" and "low octane" detonations would be similar in duration and should allow the unit to retard the spark sufficiently to provide protection.

and

2. Given the fact that my NipponDenso upgrade drop in fuel pump provides plenty of fuel to the stock primaries and 1300cc secondaries, what if any advantage is there to purchasing and installing the J&S unit.

BTW even though I have not yet replaced the infamous Apexi wastegate, to control the possibility of overboost I am running both a Profec B set to 12 and 14 psiand a pop-off valve set to 15 psi.

I have no problem spending the money to protect my engine, I just want to know that the money I spend WILL protect the engine and turbo

My other specs are in the sig.