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companies have more experience with aftermarket turbocharging than does HKS, and, even for
that firm, designing a good system is challenging. The elaborate plumbing around the
3.0-liter V-6 in this 98 Honda Accord Coupe indicates the convolutions and craft
that go into such a system. The
single turbo used here is a ball-bearing HKS GT model paired with the companys Super
Sequential Blow-Off Valve set to allow only 4 pounds of boost. Managing the system are an
HKS EVC IV Boost Controller and Turbo Timer, while an Electronic Peak Hold Boost Gauge and
Electronic Peak Hold EGT Gauge monitor the conglomeration. Inhalation is by HKS
Super Mega Flow intake, and waste gases pass through another HKS system. The goal, says
HKS, was a mild turbo setup emphasizing torque production more than peak horsepower. As it
is, though the stock fuel injectors run at only 80 percent of capacity, adding any more
boost would entail lowering the SOHC 24-valve engines 9.4:1 compression ratio.
Accompanying the
increased power, HKS equipped the Coupe with Hondas own dealer-available body kit
and rear spoiler, a set of 12.1-inch-diameter Brembo front disc brakes that retain the
ABS, Rays Engineering 18x7.5-inch wheels wrapped by P225/40ZR18 Toyo Proxes tires, and
HKS Super Sport lowering springs, which sink the coupe 1.5 inches. They also slapped
on enough graphics to keep a kindergarten amused for a month.
Because
of the relatively large turbo and low boost levels, the boost builds progressively and
goes into bypass mode early in the rev range. There seems to always be the distinct
whistle of the excess boost bleeding off. The big problem, though, is the four-speed
automatic transmission with which all Accord V-6s are equipped. Normally placid and
unobtrusive, the automatics torque converter goes into frenzied conniptions when the
turbo is pumping, causing much of the extra power to be wasted as the converter tries to
get itself together. Despite that handicap, the turbo Accord managed a 7.1-second 0-60-mph
scoot (compared to 7.4 seconds stock) and completed the quarter mile in 15.5 seconds at
87.2 mph (compared to 15.8 seconds at 89.9 mph stock). A happier transmission would bring
that 0-60 time down a few tenths and boost the terminal speed to reflect the additional 45
horsepower we figure has been added to the stock 200.
The suspension changes turn the car into a slalom rocket where it ripped a 67.2-mph
pass3.1 mph better than stock. Despite the lowering and microscopic sidewall height,
the car rides reasonably well and delivers instantaneous steering reflexes. The big brakes
hauled it down to a stop from 60 mph in just 117 feetthats 11 feet shorter
than stock. However, this Honda screams for more supportive seats to match its handling
prowess. Turbocharging any engine takes a big commitment, and HKS is just starting with
this car.
SOURCE:
| motortrend.com, HKS USA, Inc |
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