The suspension system is hyper-adjustable with a trick camber plate integrated into the set-up. However, it is the shock treatment that caught our attention. We first saw the car at the 2000 Tokyo Auto Salon and noticed a shock running inboard, longitudinally (front to rear) and parallel to the ground. There were also shocks placed in the traditional locations. We quickly surmised that these units would tend to work against each other.
Something had to give; something was not right. The traditionally mounted front shocks were dummies, which had no impact on suspension travel. The trick APEXi design is configured to provide enhanced grip at the moment of inertia as the Acura leaves the line. The suspension resists the tendency to unload the front wheels, which in theory, will help 60-foot performance. The APEXi N1 shock-and-spring combo provided 1.48- to 1.50-second 60-foot times in initial shakedown runs, which included as many as two dozen 0-60 foot runs at a time. It should be noted that the car's 8.84 had an off-pace 1.52-second 60-foot. So, how deep into the 8's the Integra will go remains to be seen.
This photo is not flopped....
This photo is not flopped. The valve cover looks upside down because the engine has been mounted backward to accommodate the X-Trac gearbox. The motor has been reverse rotated internally and mounted upside down just to bolt up to the X-Trac gearbox. The tranny better be dope.
This close-up of the custom...
This close-up of the custom fabricated exhaust manifold illustrates the craftsmanship that went into the system. The rear-facing exhaust system presented a challenge, but the APEXi crew was up to the task
The Integra's turbo system...
The Integra's turbo system is an off-the-shelf Skyline upgrade kit featuring APEXi AX53B70-P21 turbos, which are similar to a T28/T3 hybrid. Maximum boost of 22.8 psi is regulated by an APEXi race-spec wastegate and AVC-R controller.
Extreme, Yet Simple?
The engine and drivetrain are a strange tag team of extreme and simple. The engine, which has high-tech components, uses simple street electronics to control fuel and timing, not a mega- expensive, race-only engine management system. The transmission, on the other hand, is extreme. The Integra relies on an X-Trac sequential gearbox to put the power down. Using this gearbox in a Honda application brings to life many challenges so the APEXi Japan technicians had to don the thinking caps. A unique feature of Honda engines is that they rotate in the opposite direction of all other engines. This means the X-Trac would provide six speeds of reverse. To make it all work, APEXi built a reverse, or clockwise, rotating engine. That was half the battle. In order to attach properly, the engine was installed backward, with the VTEC moniker reading upside down and the header exiting toward the firewall, and not toward the grille. The X-Trac runs a triple-plate Ogura clutch, a lightweight Ogura flywheel and spins R32 Skyline axles.
Now how do you construct a clockwise-spinning Honda engine? APEXi started with a H22A engine, which was de-stroked by using 86mm forged billet APEXi crank in place of the 91mm stocker. The crank secures APEXi 8.5:1 forged pistons and billet APEXi rods. Most of the "conversion" centers around, reverse-engineering cams, reworking valvetrain timing to ensure proper firing in a clockwise rotation, a new starter that spins the flywheel the right way and properly set-up engine management. It sounds more intimidating than it is, as long as you have your own camshaft manufacturing facility.
With a bottom end built as strong as possible, attention was turned to the cylinder head. Under the "What did they do?" section of our tech sheet APEXi staff wrote "you name it." The head was ported for maximum flow and fitted with a number of custom-made APEXi parts. The cams were custom-fabricated to actuate the valves while spinning backward, which involved redesigning the opening and closing ramps of the cam lobe and repositioning the inverse flank from what would be the intake side of the lobe to the exhaust side. The valve springs and other critical components were also custom-made for the project.
The stock distributor has...
The stock distributor has been gutted and retained as a crank-trigger for the Power FC. The ignition system runs a direct-fire, wasted-spark strategy.
APEXi took the factory intake...
APEXi took the factory intake manifold and added an extension plate to increase volume. An Infiniti Q45 throttle body ensures the volume reaches the combustion chambers in short orders.
The liquid-to-air intercooler...
The liquid-to-air intercooler was a one-off extravaganza. Using APEXi air-to-air cores, the unit was constructed to fit perfectly in the intake tract. This direct line from the compressors to the intake system improved turbo response time.