ZR-1 Corvette
The 1990- 1995 ZR-1 Corvette is a modern day
classic.
Back in the 80's, the on-board computers were
not as
sophisticated as today's chips. The only way
to increase
power output besides turbocharging, was
through
multi-valve cylinder heads. The ZR-1 32 valve
engine
was derived from one of GM's subsidiery
holdings, Lotus.
The power output was always directly related
to the
emissions level requirement and insurability
factors for
each appropriate model year.
When released in 1990, the ZR-1 engine,
code-named
LT-5, developed 375 net horsepower.
It was powerful enough to propel the Corvette
down
the 1/4 mile in 13.3 sec @ 108 MPH
As computer technology improved, and with the
help of
improved airflow and cam timing, the power
output
would grow the 405 net horsepower in the last
few
years of it's production run.
The increase in power resulted in 13.1 sec 1/4
miles
@ 112 MPH !!
The doors and rear fenders and rear bumper
were
unique to the ZR-1.
The overall width of the body was increased in
the rear
of the ZR-1 to accomodate the very large rear
wheels
and tires that were necessary to handle the
tremendous
power of this exciting Corvette.
17 X 11 rear wheels were used with 315/35ZR17
GS-C
Goodyear tires and 17 X 9.5 wheels were used
up front
with 275/40ZR17 GC-S Goodyears.
.9 G's of cornering strength were well in
grasp of even
the most timid drivers. 1 G was more the norm.
During it's production run, there were a total
of four
different factory wheels used.
1990
1991-1993
1993 40th Anniversary ZR-1
1994-1995
Besides the unique aluminum wheels, ZR-1
Corvettes
are adorned with different emblems as well.
Black lettering on light backgrouds.
Silver lettering on dark backgrounds.
Chrome 40th ZR-1 Emblem.
Even more elaborate and more powerful ZR-1's
were
available, but you'll have to wait till next
month...
when the customized ZR-1's hit the web !