JUST WHAT EVERY SENIOR NEEDS - A $20,000 RIDE TO SCHOOL
by Paul
Zazarine
MUSCLE CAR REVIEW, MAY 1987
We had one rich kid in our high school. Since his
family could easily have sent him to a private institution, I never understood
why he was in the public school system. As befitting a child born to wealth, he
had the best of everything - the best clothes, plenty of money for dates (and
plenty of dates) and he drove a new car. So when the new Camaros were introduced
in February of 1970, the rich kid dragged daddy to Ourisman Chevrolet and picked
out a brand spanking new Z/28.
That was the year the Camaro was redesigned, and the Z/28 received as
standard equipment the Corvette's LT-1 350 cubic inch engine, which was
advertised at 360 horsepower. When the rich kid drove that Z/28 into the student
parking lot the next morning, it created a stir worth the $4000 it cost daddy to
keep the rich kid happy and off his back. Visually, the Z/28 was a killer, with
European inspired curves, bold stripes, spoilers and a genuine sportscar
instrument panel. The rich kid looked good in his high dollar ride, while the
rest of us seniors bemoaned how unfair life was as we slogged around in
rusted-out Chevys and VWs.
Now it's a generation later, with new fashions, new fads and new ideas. And
for the first time in a long time, there are performance cars that kids can
dream of owning. Cars such as the 1987 IROC, which still creates pandemonium in
high school parking lots just like the LT-1 Z/28 of 17 years ago. And just like
that 1970 Z/28, the hot ticket for today's IROC is the 'Vette engine. But
instead of LT-1, the code word now is L98. For the unindoctrinated, that's the
5.7 liter (350 cubic inch) tuned port injection Corvette engine which finally is
available for the IROC.
Chevrolet was forced to make compromises so this package could come to
market, and while the 350 IROC is a vast improvement over the 305 engine, after
driving the L98, we can't help but think with 350 cubes on tap there would be
more substance here. For L98 engines slated for installation in F cars, an iron
cylinder head is employed as opposed to the Corvette's aluminum head, and the
Camaro's more restrictive exhaust manifolds and pipes are required.
Consequently, the 350 only rates a 220 horsepower rating, as opposed to 245 hp
in the 'Vette.
The L98 receives some improvements for 1987, like the use of hydraulic roller
valve lifters to reduce engine friction and pick up one to five horsepower. To
ensure proper orientation of the roller lifters to the camshaft lobes, Chevy
engineers added a lifter guide, guide retainer and a camshaft thrust plate. The
lifter guide prevents the lifter from rotating and skewing off the camshaft
axis. The thrust plate absorbs thrust loads from the cam, and also "locates" the
cam, ensuring that the lifters are correctly centered on the cam lobes. Like
most 1987 Chevy V-8s, the F-car L98 receives a new cylinder head with a revised
combustion chamber design for more efficient flame propagation.
All of these improvements are to increase engine efficiency and fuel economy.
However, after putting nearly a thousand miles on our test IROC and calculating
the fuel mileage, we assume Chevrolet had to crank out more gas sipping
Chevettes to balance their CAFE requirements. We'd suggest you thank the next
Chevette owner you see; because of him there are L98 IROCs for sale. The IROC is
most definitely a musclecar, if just by virtue of its ability to swig unleaded
premium to the tune of 13.9 mpg on combined freeway and city driving, with a
stint at the dragstrip thrown in for good measure.
The only transmission available is a four-speed automatic with overdrive, and
that's tied to the one rear axle offered, a 3.27:1 ratio. The combination works
together as well as any we've driven. The transmission shifts with authority,
there's no lag in downshifts, and in overdrive the 350 putters along at 1750 RPM
at 55 mph. When the call to action is sounded, the IROC gathers up the ponies in
a furious rush that comes on steady and strong. The IROC is not a beast; it
doesn't bludgeon the road. Without doubt, it is a powerful automobile with lots
of muscle. It's not the fastest new car we've tested, but it would dust off
plenty of old, big block musclecars.
Cornering in the IROC can be an interesting experience. With 57% of the
weight on the front, the Camaro likes to track with some extra toe in the
throttle, but uneven surfaces instantly point up the IROC's rear end
skittishness. Under almost all driving conditions, however, the IROC's
suspension is drum tight. It's a competent setup, as evidenced by the fact the
only necessary modification done to the IROC's suspension to accept the Corvette
mill was a caster adjustment to the MacPherson struts.
The L98 cranks out 320 lbs.-ft. of torque, and with the front end weight
bias, that's more than enough to break the rear loose when dropping down a gear
and powering out of a turn. We discovered this trait one night while chasing
down a country two lane, hot on the heels of a 1987 Mustang GT five-speed being
driven by the editor of our sister publication, Mustang Monthly. The road took a
hard 90 degree left, straightened for 100 yards and then broke right into
another 90 degree turn. Going into the left, the Mustang pulled away from the
Camaro. Down the straight, the IROC regained lost ground. Upon entering the
right hander, we dropped the IROC into second and stayed right on the Mustang's
tail. At the apex of the turn the Mustang again pulled away, and as we powered
out, so did the IROC's rear, swinging around in an attempt to swap ends. We
developed a healthy respect for the L98's torque after that.
Don't get us wrong. The IROC is one of the best handling cars we've ever
driven, but it does have it's limitations. There's no limitations to the IROC's
superb four-wheel disc brakes, however. Stops are sure and straight with no
lockup, especially in panic stops from high speeds. In the event some joker in
front of you on the interstate decides to lock up his brakes at 60 mph, it's
reassuring to know you have a fighting chance of not ending up in his back seat.
We have nothing but praise for the interior and driver ergonomics of the
IROC. You don't get into the IROC as much as you put it on, and it feels and
looks good. It's comfortable and reasonably quiet, with well layed out
instrumentation that's clear to read. The front seats are fully contoured, very
comfortable, and with power seat adjustment and tilt wheel, anyone can find the
right driving position. The rear seat is actually two separate units that fold
down individually, and provide no leg or headroom for anyone larger than Kermit
the Frog.
We were really disappointed with the Delco-Bose sound system. The left front
speaker in our test car was blown, and the rear speakers located in the rear
cargo floor sounded muffled. The large dash pad, with its extreme overhang, drew
criticism from some MCR staffers. That didn't bother us nearly as much as the
sun's reflection off the pad onto the windshield. The glare was more than
aggravating, it was downright dangerous.
The fit and finish of our test car was top notch. The Bright Red IROC wore a
paint job that looked about three miles deep. We haven't inspected any others to
see if this is typical of assembly line work, but if so, the General is making
progress in quality control. Few cars are as stimulating to look at as the
IROC-Z. The lines are statuesque, and the slope of the hood is downright
sensuous. The IROC styling package, which includes the aerodynamic nose,
incorporates a set of fog lamps and a scoop that feeds cold air to a Y-shaped
plenum located at the top of the core support ducted directly into the intake
manifold.
Every American male over the age of 35 should have the opportunity to drive
the 350 IROC for at least a day. One turn behind the wheel is better than the
fountain of youth, because every time we strapped on the IROC we became 18 years
old again, shed 75 pounds and regained all our hair. And that's worth the price
of admission right there.
There are still rich kids in high school nowadays, and their parents still
buy them cars to keep them quiet, although it takes a little more pocket change
to buy a 1987 IROC-Z. It's been a long time since I've seen the rich kid from my
high school days, but somehow I wouldn't be surprised if he isn't driving
something boring, like a Peugeot. Maybe there is justice in this world.
DIMENSIONS SUSPENSION ENGINE DRIVETRAIN PERFORMANCE (two aboard) 1/4 mile @ mph Braking Peak braking G from 60-0
Wheelbase- 101.0"
Overall
length- 192.0"
Overall width- 72.8"
Height- 50.3"
Advertised weight-
3490 lbs.
Passenger capacity- 4
Base price- $12,675
Price as tested-
$19,749
Front- MacPherson strut, coil spring, lower control
arms, anti-sway bar
Rear- Coil springs, live axle, torque arms with Panhard
rod, gas shocks and anti-sway bar
Steering- Recirculating ball
Brakes-
Power assisted 10.5" vented disc front and rear
Wheels- 16 x 8" cast
alloy
Tires- Goodyear Eagle VR50, P245/50VR/16
Type- V-8, ohv
Bore and stroke- 101.6 x 88.4
mm
Displacement- 5.7 liters (350 cubic inches)
Compression ratio-
9.0:1
Advertised horsepower- 220 @ 4200 RPM
Calculated peak horsepower
219.48 hp
Advertised torque 320 @ 3200 RPM
Calculated peak rear axle
torque- 222.8 lbs.-ft.
Induction type- Tuned port injection, with cold air
induction and aluminum intake manifold with tuned runners
Transmission- Four-speed automatic
Gear ratios
4th
- 0.70
3rd - 1.00
2nd - 1.63
1st - 3.06
Rear axle ratio
3.27:1
Acceleration
0-30- 2.54 sec.
0-45-
4.54 sec.
0-60- 7.09 sec.
0-90- 15.06 sec.
14.88 @ 92.87
30-0- 31 ft.
45-0- 57 ft.
60-0- 124 ft.
1.048 G