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Ported Factory Supercharger Install - Huffin' `N' Puffin' ...
...And Blowing Down The House Thanks To A Ported Eaton On Our '03 Cobra.
The magical numbers that pour out of Ford's latest supercharged mod motors make us look back and cry at the good ol' days of 5.0 racing. Looking back, you needed not one, but more often, two power adders to make anything over 450 hp at the wheels. Street racers, and even the big guns of Mustang racing used the hot setup of the time, which was to slap on a Vortech supercharger and a 100-shot of nitrous to dip into the 9s. Meanwhile, the most radical of EFI Mustangs sported big-dollar engine combos to get into the 8s, but often that resulted in unstreetable and often unreliable combos.
Fast-forward to 2009 and the early days of horsepower discovery are nothing but a long-distance memory, like cheese grater taillights, a short-belt, Pro-M 77mm mass air meters, and Reef Blue Metallic paint.
So when we say it's easy to make horsepower these days, we mean it. For instance, we've been able to witness this '03 Cobra make over 450 to the tires with nothing more than basic bolt-ons. As a matter of fact, this particular Terminator has already cranked out 453 rwhp and 453 rwtq with nothing more than a few normal bolt-ons, including a simple cold-air system, a cat-back exhaust, an overdriven supercharger pulley, and a quick reflash of the PCM.
Just 15 years ago, we would have given an arm, a leg, and maybe even a reproductive organ to make that much power. But when you can have it in a car that drives like it did when new, starts up every time to take you to work, and gets respectable fuel economy, it makes you happy enough to hug your local gas station attendant.
Even at $4 per gallon for hi-test, I can't think of any Mustang owner who's not looking to find a way to make their ride quicker. Aside from bragging rights at the parking lot of the local Choke `n' Puke (or Internet website), we all want to be slammed back into that seat and hang onto the steering wheel for dear life. We want to be scared and have things happen so fast that we barely have enough time to think. So, as addicted as we are to power, we decided to take a look at doing the normal thing that Cobra owners do next, which is to add boost.
After conferring with Mustang Magic's in-house tuner Joe Lauzardo and proprietor Joe Panciarello, we decided to install a ported supercharger. At our stage of the game, we were maxing out what the factory Eaton M112 can provide.
Even at 12 psi, the stock supercharger is limited by its outlet port size, which is a V-shaped opening that faces downward and dumps pressurized air into the intercooler core and the intake manifold. Total airflow and volume coming out of the stock blower is just about at its limit at 453 rwhp, so going to a ported unit would not only increase airflow and volume, but velocity as well, enabling us to increase boost pressures and ultimately, horsepower and torque. As luck would have it, a good friend of ours was upgrading to an aftermarket blower and we bought this ported unit, which was just sitting on his shelf, never used. He forgot who he bought it from but it looks like a rather professional port job. We figured there was no better way to see how it works than to dyno and drag test it.
With the blower in hand, we called Mustang Magic, where Lauzardo explains, "On a car like this, a ported blower will usually not give you tons of peak power, but rather big gains in torque, especially when driving around town. To make it work, you should put on more aggressive pulleys to get the blower spinning faster so that the power comes in early and it snaps when you hit the gas pedal. You should use a four pound pulley on the crank and leave the 3.0 upper pulley that's on there."