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Project NissanTitian - Supercharger Install

Part 1: A supercharged kick-off

Photography by Robin Stover
Back from a brief appearance at the 2005 TTC, she's armed with Bushwacker fender flares, 33-inch Nitto Mud Grapplers, a set of 18-inch Teflon-coated American Racing Mojave wheels, and a stunning graphic treatment from the creative minds at Ape Wraps.
Back from a brief appearance at the 2005 TTC, she's armed with Bushwacker fender flares, 3

If you've followed the buildup of our Top Truck Challenge-inspired Mega Titan, you already know how far we at Four Wheeler are willing to go to make Nissan's fullsize work well off pavement. And though our Mega Titan has received a great deal of praise from critics and readers alike, we've also found that some people have absolutely no interest in modifying a late-model pickup to that extent. Nor do all readers subscribe to the TTC style of four-wheeling. In fact, it's almost impossible for the majority of our readership to justify taking a perfectly good-not to mention expensive-pickup truck and changing it so heavily that it can't be driven legally on public roads. This is what sets our two Titan projects apart. We showed you our wild side with the first truck. Now, with the Everyday Titan, we're going for real-world appeal.

To help differentiate between our Titan twosomes, we want to identify the activities we plan to use our second Titan for.

Just as the name implies, the Everyday Titan will serve as a daily driver, a tow rig, a fun hauler, and a weekend trail rig. As such, we plan to highlight products that increase comfort, safety, performance, and utility. When all is said and done, we want this Titan to comfortably navigate thick L.A. traffic all week long, and then come Friday afternoon, hitch up an ATV trailer or toy hauler with all the necessities for a weekend away from it all. After all, that's why most Americans buy pickups, isn't it?

Here is our Everyday Titan's dyno data. We were surprised to learn we gained 118 hp and 82 lb-ft of torque in street mode.
Here is our Everyday Titan's dyno data. We were surprised to learn we gained 118 hp and 82

In this segment, we're going to address the Everyday Titan's need for additional horses under the hood. Now don't get us wrong-the Titan's stock 5.6L V-8 does a terrific job smoking the P265/70R18 tires. It's just when you add 60-plus pounds of steel and rubber at each corner and ask for the same performance, it's not going to happen. So we took a few steps to see how much we could increase our truck's performance. First, we started with a cold-air intake from NISMO. Next, we salvaged the Banks Monster after-cat exhaust system we removed from our Mega Titan (see Nov. '05) shortly before the SEMA show last year. Finally, we went to Stillen of Costa Mesa, California, for a brand-new supercharger. Stillen spent 13 months developing its Supercharger kit for the Titan, Armada, and Infiniti QX56. The system was engineered for daily drivers who want a reliable increase in performance for towing and street applications. The kit uses an Eaton positive-displacement twin-rotor compressor to develop 6 psi of manifold pressure. We were very impressed with this kit's completeness. It's also worth mentioning the system's CARB-approval certification.

  • This cold-air intake can be purchased from any North American Nissan dealership. We like it because it creates a wicked sound and provides a noticeable increase in throttle response across the entire rpm range. Easy to install, this intake makes for a great weekend modification. We spent about 2 hours installing it in our driveway, and had no problems or issues to speak of. Nissan claims this kit adds up to 12 hp on all Titan and Armada applications.
    This cold-air intake can be purchased from any North American Nissan dealership. We like i
  • This supercharger is designed to be consumer-friendly and work right out of the box. However, we feel compelled to warn you that if you don't have a good understanding of mechanical things, it's going to be a challenge. We recommend a good understanding of basic wiring too. If you decide to do the install yourself, know that Stillen has a great customer service network standing by to help guide you through the process. Here you can see several superchargers lined up in Stillen's facility ready to be packaged and shipped. All complex assembly is handled in-house to simplify things for the customer.
    This supercharger is designed to be consumer-friendly and work right out of the box. Howev
  • This is the Stillen Stage II supercharger kit in its entirety. Note that the kit includes an aluminum intercooler to help lower post-compression air temperatures. This stand-alone air-to-liquid intercooler system is comprised of two individual coolers: A coolant pump and a molded plastic coolant reservoir. This intercooler system, along with an additional 1 psi of boost pressure, is the primary difference between Stillen's Stage I and Stage II supercharger kits. We picked the higher-powered, more expensive kit because we know how important intake air temperatures are to high-performance engines, especially when towing. The Stage I kit costs about $1,000 less than the Stage II kit, but you also have to sacrifice 35 hp at the wheels. We like that the intercooled system is CARB-approved and is also available with a 3-year/36,000-mile engine warranty.
    This is the Stillen Stage II supercharger kit in its entirety. Note that the kit includes
  • We're going to charge past the first few steps of this installation process because of our limited page space. These steps are covered in the instructions and have to do with upgrading the factory in-tank fuel pump. Basically, you drop the tank and install a higher-flow fuel pump (included with the kit), which provides a slight increase in fuel volume. Once that was completed, the stock intake manifold was removed and each intake runner tube was prepped with a solvent.
    We're going to charge past the first few steps of this installation process because of our
  • With the composite OE intake-manifold assembly removed from the engine compartment, it was necessary to remove a few items and reinstall them on the new aluminum Stillen intake manifold assembly. These included both of the stock fuel-injection rails, all of the fuel injectors, and all of the intake seals (shown).
    With the composite OE intake-manifold assembly removed from the engine compartment, it was
  • This kit requires a short sequence of wiring modifications to allow the Stillen piggyback electronic controller to interface with the stock ECU. The kit's instructions include a detailed wiring diagram of this, but the process does require some patience to complete. Overall, the wiring modifications are pretty basic.
    This kit requires a short sequence of wiring modifications to allow the Stillen piggyback
  • This is the Stillen piggyback ECU mounted to the underside of the fuse-block lid.
  • It's best to have two people when you lower the new supercharger assembly into the engine compartment. The unit is both heavy and awkward to handle.
    It's best to have two people when you lower the new supercharger assembly into the engine
  • Here is the new Stillen supercharger assembly mounted to the top of the engine. Note that there are two separate fuel-injection rails visible in the photo. The additional aluminum fuel rail (red arrow) provides fuel to the secondary set of injectors during wide-open throttle events. Otherwise, the stock fuel rails and injectors are doing most of the work.
    Here is the new Stillen supercharger assembly mounted to the top of the engine. Note that
  • Here you can see the Stillen tech tightening up the difficult-to-reach rear assembly bolts. These are hard to get at because of spatial limitations. Check out the stainless steel driveshaft running alongside the supercharger housing. This shaft transfers drive torque to the rear of the supercharger assembly, where the compressor drive pulleys are located.
    Here you can see the Stillen tech tightening up the difficult-to-reach rear assembly bolts
  • This is the new inlet neck. This piece was designed and built specifically to adapt the OE throttle body to the supercharger housing. This part was sealed with a special anaerobic sealer to prevent leaks.
    This is the new inlet neck. This piece was designed and built specifically to adapt the OE
  • The Stillen supercharger system has two performance settings. The first is more aggressive for everyday street driving. The second setting is for towing. Basically, this changes the mapping on the supercharger's supplemental fuel system so that the system does not overfuel the motor during heavy hauling. Here you can see the two-position toggle switch we installed on the center lower dash panel, on one of the unused switch blanks.
    The Stillen supercharger system has two performance settings. The first is more aggressive
This is the Stillen intercooler reservoir tank. This poly tank is plumbed into the closed-loop intercooler system adn housesa small volume of reserve coolant to allow for expansion and contraction at varied altitude and temperatures. It mounts right nest to the stock power-steering reservoir via a clean laster-cut zinc-coated bracket.
This is the Stillen intercooler reservoir tank. This poly tank is plumbed into the closed-

In a word, amazing! The seat-of-the-pants difference is unbelievable. This truck will light the stock rear tires a whole city block before hooking up. With the added weight of the 33-inch Nittos on 18-inch wheels, the truck still performs much better than stock. However, we're unsure how long the rest of the drivetrain will last with this much power on tap. The transmission is now our primary area of concern as the factory torque converter is no match for this kind of consistent torque. On the dragstrip, our Titan laid down an impressive 13.8-second quarter-mile time. And around town, the Everyday Titan is quicker than any big-block vehicle we've challenged. The sound produced by the supercharger coupled to the Nismo intake is downright scary. The Banks Monster exhaust sounded even more grown-up after the truck was supercharged. Long grades make us think we have a jet engine under the hood. The whine of the Eaton unit, in combination with the NISMO intake, is quite loud. Stillen says without the NISMO intake the supercharger upgrade is almost unnoticeable in terms of noise.

The only drawback to the Stillen supercharger is that it, like most superchargers, requires high-octane premium gas. Here in L.A., this added expense can run between $16 and $26 per fill-up. As for the supercharger's affect on everyday driving, we did notice a slight increase in fuel economy during light-footed highway driving scenarios, but these were short-lived as we couldn't help but stab the go-pedal on even the slightest of grades. We even used our Everyday Titan once to haul our project Teal-J to Las Vegas for the SEMA show. Needless to say, towing is now one of our truck's newest strengths. We only hope the Dana 44 rear axle will survive until we build it up.

SOURCES
Nissan North America American Racing
1275 Davis Rd., Suite 300
Elgin
IL  60123
8-00/-321-5489
3-10/-635-7806
www.americanracing.com
Bushwacker Stillen
3176 Airway
Costa Mesa
CA  92626
714-540-5566
www.stillen.com
Nitto Tire
Dept. MM&FF
6261 Katella Ave.
Cypress
CA  90630
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