The day finally came in Feb 2020 that I dropped my car off at EFX Tuning to get a MAJOR engine overhaul for power gains. Many of my fellow members from CCNY also take their cars here for performance work and I previously had my timing chains done by this shop which had built my trust in their business to do a quality job. So let’s get down to it, shall we?
The following is a list of what is included in the kit, which was listed on Overkill’s website at the time I purchased it but info has been changed since then because he now offers Procharger Kits instead.
The Supercharger Kit Stage 3 includes—
- Vortech V3 Supercharger: Self contained oiling system (no oil lines connect to the engine), efficient supercharger, supports up to 16psi on the 3.6L
- Independent drive belt system: Separate pulley and belt system provides reliable performance, doesn't impact factory belt operation. A change of supercharger pulley then bumps the boost up to 11-12psi (from the 8-9psi of Stage 1). This provides the power to make 400-420 wheel horsepower, a 175-200 engine horsepower gain over factory.
- Full Intercooler system: Mishimoto brand air-air intercooler, Vortech MaxFlow Race blow off valve, custom machined MAF housing and full silicone/aluminum tubing with Tbolt clamps, top quality components for reliable performance in all weather conditions.
- HP Tuners suite with Overkill custom tuning available: includes HP Tuners VCM Tuning suite with each kit. While other supercharger manufactures may provide a base tune, we ARE the tuners and can provide custom tuning direct to you or your installation facility.
- Tracy Lewis Signature Series catch can: Best performing catch can on market, separates oil vapors to ensure clean engine and intercooler
- Full Intake system with air filter, new AC Delco spark plugs designed for boost, and a full complement of parts required for installation.
- A high flow fuel tank fuel pump replaces the factory V6 fuel pump and larger fuel injectors replace the factory injectors for additional fuel capacity.
I also purchased the following parts to be installed in addition to the kit—
- Overkill’s 76mm Throttle Body
- Circle-D HP Series 6L50 TC 3200 High Stall Torque Converter
- MACE Performance 210°/210° Camshafts with Modified Fuel Lobe
- MACE 90 lbs Valve Springs
- JET Mass Air Flow Sensor
- Accel Ignition SuperCoils

One of the boxes arrived damaged and of course it was the one with the SC in it *sigh* the supercharger mounting plate was chipped and scuffed up considerably but the pulley looked okay.

Contents of the damaged box that I took out to inventory and make sure nothing went missing through the hole during shipping.

Contents of another box I was asked to inventory by Will.

I don’t have any real install photos since the work was done at the shop which is a 5 hour round trip drive there (without traffic). I also got deployed overseas from May 2020–May 2021, so wasn’t able to get any updated content other than what was being shown to me by the shop.
Some of the major issues the shop encountered while installing the kit that I had to communicate with Will for him to address were:
- Reducing coupler/ring for charge pipe to supercharger is missing from kit.

SOLUTION: “The reducer sleeve I discontinued using due to the tendency to blow apart if the clamp wasn't perfectly positioned. The 3" silicone will compress and conform to seal to the 2.75" Vortech outlet, but since this Stage 3 Kit purchase I did have custom elbows made with a 2.75 coupling; if you wish to continue with the installation rest assured the silicone does compress and conform without issue to seal on the Vortech.”
- SC belt runs along the body of SC tensioner body.

SOLUTION: “From the pictures, it looks like the tensioner is at full tension for the belt to be that close to the body. A slightly longer belt should fix that; double check the belt but it should be a K080547, the next size up is K080550, and if the tensioner becomes too slack a larger pulley 38022, both Gates numbers, will take up the slack.”
- Washer fluid reservoir does not mount in appropriate mounting points.
SOLUTION: Provided brackets for intercooler and washer reservoir did not bolt-on properly and new ones had to be fabricated.
- Missing washer pump.
SOLUTION: “Washer pump was sent in a later package but it's for a 2000 Crown Victoria.”
- Incorrectly sized t-bolt clamps and coupler for throttle body to charge pipe connection included in kit.
SOLUTION: Had to source parts locally for appropriate fitment.
- Cannot get vehicle to idle with current injectors installed. Cannot confirm injector issue or data issue without good injector data (injector flow constant) for the E69 controller. Asked Will how many # the injectors were and any other info he might have
SOLUTION: Will did not give a direct response for injector data, instead requested we send factory tuning file from the vehicle so he could write Overkill starter tune and continue to provide remote support.
- Belt alignment issue with the supercharger. The belt is not riding center and is rubbing on a bracket bolt on the underside of the blower bracket. That would become an issue if it persists because it would cause the belt to wear prematurely. This problem has happened in a couple of spots and has been on going. The blower may need to be spaced forward to make this work out correctly.
REPLY: Can you take some pictures of the belt, in particular from the side, want to see what they might mean about not riding in the center, if they mean the crank pulley it's ok for the belt to be on the ribs that are furthest towards the engine. I've seen the belt contact the mounting plate bolt right below the supercharger pulley before, each setup is slightly different. Because there's three identical large bolts right below it and bolts behind the pulley, it's ok to remove this one bolt from the mounting to correct the contact issue.

Belt clearly hits one bracket bolt, belt rides off center on blower pulley, looks to be square or near square on crank.
SOLUTION: If the belt is walking that way, it's likely an alignment issue, and I assume the crank is running on the ribs towards the engine leaving bare the outer 2 ribs on the crank pulley? I had to make longer spacers for the Procharger switch, I think if I sent those that would fix this issue as well. I'll also include upper radiator brackets that were needed with the longer spacers, they're a quick swap atop the radiator.