Shown is our Marine/Racing version. Features include high energy inductive discharge ignition and adjustable rev limiter. This system is ideal for turbo, supercharged, high compression, or even nitrous applications. An optional display shows the amount of knock retard.

Using a single knock sensor, the system detects the onset of detonation and retards the timing on a per cylinder basis. A mode switch lets you select a maximum of either ten degrees or twenty degrees of knock retard. In the ten degree range, the unit retards one, two, or three degrees per ping. Double that for the twenty degree range. The system is always trying to re-advance to stock timing. In the ten degree mode, it re-advances at the rate of one degree every twenty revolutions.

The system does not need a cam or crankshaft reference to determine which cylinder to retard. The unit is programmed to "know" that the knocking cylinder is the one that just fired, and that it won't fire again for two more revolutions. When the knocking cylinder comes around to fire again, software dials in the retard amount for that cylinder. It does this as each cylinder goes by, building up a different retard amount for each cylinder.

The unit has a high energy ignition with constant energy dwell controller. The system monitors the coil current, and adjusts the dwell time to achieve seven amps of coil current. Compared to a GM HEI, this is a 62% increase in energy stored in the coil. The system can also be used to trigger an MSD.

The Marine/Racing version features an adjustable Velvet Touch rev limiter. At the selected limit, the system fires two cylinders, then skips one, and repeats this sequence. For six cylinder engines, the sequence is fire three, then skip two. If the engine goes 100 RPM above the selected limit, the system will skip as many cylinders as needed. A test point is provided to adjust the limit, scaled at one volt per 1000 RPM. For example, if you want to set the limit at 6250 RPM, adjust the knob so that the RevTestPoint reads 6.25 volts.

Standard automotive units are also available for single coil foreign and domestic vehicles as well as multiple coil applications, including Honda, Miata, Subaru, Eclipse, Toyota.

For engine builders and dyno operators, check out our Knock Finder Dyno Timing Controller.

Harold Bettes of Superflow showed the J&S Knockfinder Dyno Box at the 2001 Superflow Advanced Engine Conference. Already in use by top engine builders the unit sparked a lot of interest especially in the top ranks of NASCAR where every horsepower is hard to come by and where the schedule to meet races and develop dozens of engines is relentless. Major teams said the unit would save them valuable time considering their responsibility to develop so many combinations in that it was easy to hook up and the slide pots gave them instant control over each cylinder's timing.

New 1 Ch/2Ch "combination" unit for imports with one or two coils. UltraSafeGuard versions feature boost retard as well as knock retard, adjustable MAP Limiter, TPS trick, VTEC squelch

New Ultra SafeGuard Direct Ignition System for newer vehicles running two, three, or four ignition coils are available. The four coil version can be used on the '96 thru '98 Mustang. These units feature boost retard as well as knock retard. Closed loop timing control allows you to run aggressive timing and not risk blown head gaskets or broken pistons. For full details contact J&S or go to our Products page for more information on what a J&S Ultra SafeGuard can do to maximize your vehicle's potential and protect your investment!