Steve Baur
Former Editor, Modified Mustangs & Fords
December 1, 2007
Photos By: Bob Watson

Guys and gals, grab your safety goggles; we're going to show you a great way to make big power and do it safely using two relatively new safety devices. Obviously, practicing a little self-restraint when it comes to tuning your supercharged or turbocharged ride will go a long way, but we wanted to tune you in to a couple of neat safety devices that can save your motor in the event of engine knock, detonation, or in our case, the lack of water/methanol flowing freely into the engine.

We've worked with Woodland Park, Colorado-based Snow Performance before and have shown you the benefits of using the company's water/methanol injection kit on both pushrod and modular powerplants. In this article, we'll once again show you what the water/ methanol injection can do-this time on a super-charged Two-Valve powerplant-in addition to showing you how Snow Performance has taken the next step in its water/meth system's develop-ment with its new SafeInjection control unit.

"Water/methanol injection is great, and our systems are engineered for reliability," says Matt Snow of Snow Performance, "but in the case where you run out of fluid with an aggressive tune, many want the peace of mind that this system provides."

The chemical intercooling properties of the water/methanol mixture allows the end user to run more ignition timing than normal. If you run out of the boost juice, though, an aggressive timing table can mean bad things for the engine.

The user-friendly nature of Snow Perfor-mance's Boost Cooler system means a lot of people use it on their street cars. Let's face it, we've all run a few miles over our next oil change at some point, so what's to say you won't forget to fill up the Boost Cooler reservoir? Snow Performance is here to prevent anything bad from happening should you have an absent-minded moment.

Snow's SafeInjection is a handy piece of hardware that monitors the flow of the water/ meth mix. If the mixture stops flowing, the unit sends a 12-volt signal which, in addition to illuminating a warning bulb, can be used to trip numerous devices that can activate a bypass solenoid or wastegate to open and dump boost or, as in our case with the J&S Electronics SafeGuard, reduce timing.

The J&S SafeGuard control unit is a handy piece of hardware that retails for about $600 and is wired into the coil packs of your '96-'04 Mustang GT. It can detect engine knock using the available Bosch sensor and pull timing through the coil packs to save both your engine and your pocketbook from melting down. What's better is that the J&S unit can be triggered to work via a 12-volt source, such as the one from Snow Performance's SafeInjection, so in effect, you'll have two safety devices working together to protect your underhood investment.

Insert the high-pressure line from the output of the pump into the quick-connect fitting labeled PUMP on the front of the SafeInjection unit. Pull on the hose after inserting to ensure a tight connection. Insert a second high-pressure hose into the quick-connect fitting labeled NOZZLE on the front panel-the other end of this hose is connected to the nozzle itself.

It's important to note that the J&S SafeGuard is designed to pull up to 20 degrees of timing when reading through its knock sensor, while its switched timing retard (triggered by the Snow Performance SafeInjection in this test), offers only 2 or 4 degrees of timing retard. In this test, we were able to increase total timing from 19 degrees to 26 degrees for a total increase of 7 degrees. Obviously, the 4 degrees of retard built into the SafeGuard will not be sufficient, but J&S informed us that the unit can be reprogrammed to provide even more timing retard. Based on your engine combination, this will be something you'll want to consider when ordering the unit.

Our subject vehicle for this test was an '01 Bullitt Mustang belonging to Bob Watson of Jacksonville, Florida. Bob's Bullitt (No. 5094) has the distinguished honor of being the second fastest Bullitt Mustang (according to in the country, thanks to its big-bore 302ci, Vortech-supercharged powerplant. It has run a best elapsed time of 10.01 at 136 mph.

We followed along on the install as Matt Snow and HP Performance's Jason Combs handled the SafeInjection installation. HP Performance in Orange Park, Florida, also provided the Dynojet dynamometer for our testing purposes, in addition to SCT custom tuning by HP's Tony Gonyon.

The installation of these two components is fairly easy, though we don't recommend it for the novice. Working in tandem, the SafeInjection and SafeGuard allowed us to crank up ignition timing by 7 degrees, and safe horsepower escalated as a result. Should the water/meth mix run out, Watson now knows that the safety devices he has in place have his back.