| Integra GSR VTEC 4 Throttle |
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Acura
Integra GSR VTEC 4 Throttle
Featured in the February 1994 issue of CARBOY, a Japanese car enthusiast magazine,
this car was modified with 4 individual throttle bodies. CARBOY featured the
vehicle because of the unique induction set-up for the VTEC engine.
(That issue was dedicated to U.S. Tuning of Japanese vehicles.)
The Honda VTEC engine design was introduced at the same time Toyota introduced
the 20Valve / 4Throttle 4AG. We
anxiously wanted to find the tuning potential of the variable cam timing design,
and there were no U.S. Toyota models. A custom intake was fabricated to align perfectly the throttle
bodies into the intake ports. An
Electromotive Tech II was used to easily program different fuel and ignition
curves- and also to test (and learn!) the affectivity of VTEC technology.
To fully document the results the engine was not modified.
To assure affectivity and complement the state-of-the-art intake, DC
headers and an HKS exhaust was used. The
result was a dramatic increase in throttle response- off idle, part-throttle,
and past the redline. A Formula
2, screaming engine!! The 4-Throttle
set-up proved a definite performance upgrade to the Honda engine, but was very
expensive, more than a turbo kit. In
retrospect, the Toyota 20Valve 4Throttle set-up, introduced in Japan a few months
earlier was short in HP! (and 200cc) and did not have a variable lift. The new Celica 2ZZGE engine finally catches up, a “little”
late- 9 years, but at least in the same decade.
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