Engine:
Az Automasters built, Supercharged 406 cubic inch Tuned Port Injected
small block chevy
Rated 440
Horse power, 450 ft. lb. torque , normally aspirated, before supercharger
boost
Highlighted internals:
Block: cast iron , high nickel content Chevy 400 small block, .030
over bored, race prepped including torque plate honed cylinders, enlarged
oil returns, deck surface plugged, milled and orficed for improved
cooling, oil pump block feeds radiused
Oil pump:
Melling high volume
Oil pan:
GM 69 Z28 road race pan, including crank scraper, internal baffles
& windage tray
Rotating
assy. : Eagle performance forged crank and connecting rods, including
ARP rod bolts
Pistons:
10.5 to 1 compression ratio hypereutectic’s, high temp rings
gapped for boost
Timing chain:
double roller
Balancer:
Custom fluid dampner
Camshaft:
Comp hydraulic roller, custom grind 224/230 dur.@ .050, .524/ .524
lift on a 112 degree lobe sep angle , TPI specific
Cylinder
heads: Trick flow, twisted wedge aluminum heads featuring 2.02 intake,
1.60 exhaust, stainless steel necked down and swirl polished light
weight valves, stage 3 port job, Installed with ARP head bolts
Pushrods:
Comp cams hardened .080 wall chromemoly
Rocker arms: Comp cams aluminum 1.6 ratio full roller rocker, red
anodized
Intake manifold:
lower is stock TPI, max ported to equal “big mouth manifold,
& port matched to runners, Upper plenum is max ported to runners
& throttle body
Intake runners: TPI specialties high flow tubular runners, proven
the best available on the market in multiple dyno comparisons. Beats
the Accel’s flow slightly & stay cooler due to thin OEM style
tubing, not thick casting
Throttle body: Az speed & marine 58 mm, shaved shaft & titanium
blades
Oil filter:
deep high capacity, with clamp on aluminum finned cooler
Engine mounts: Custom solid steel mounts were installed, eliminating
any engine torque loss thru absorbsion, and further strengthening
the frame rigidity, creating a new tie point
Supercharger
/ Air intake system
Supercharger:
Vortech, reverse rotation, T trim blower, engine oil cooled, max capable
boost 20 psi. Current set up with 8 rib belt, pulley calibrated to
make 10 psi boost at 6000 eng. Rpm.. This enables the supercharger
turbine impeller speed to be ran at roughly 50% of maximum rated speed
at engine rpm redline, keeping the air discharge temps in the most
efficient range possible.
Oil supply:
Supercharger oil is fed from engine, thru a dedicated oil cooler designed
to be large enough to cool an entire engine, with it’s own cooling
fan. It is mounted to driver side front fender vent area, with fan
blowing hot air out the vent. Keeps a constant cool supply of oil
to blower, aiding in keeping air discharge temps down.
Intercooling:
Water/ alcohol injection system provides “gasious intercooling”
. Uses 50/50 ratio, and drops intake air temps 50 degrees F. in 1
sec. & 100 Degrees in 2 seconds after engagement. Kicks on at
2 psi boost, and is adjustable.
Air intake
system: Air is pressure fed to supercharger thru a Breathless performance
Ram Air kit. The ram air scoop is forward facing, located in the front
license plate area, forcing air into the air filter assy. , that is
custom hand modified to exit the pressurized air thru sealed tubing
directly into the supercharger inlet. This Ram air kit does not interfere
with airflow to the radiator, and id the best on the market for C4
Vettes. It adds horsepower thru pressure, and by supplying the blower
with only cool outside air, unlike any blower kits made for these
cars, truly unique and custom.
Blower mounting:
this is a custom Az Automasters engineered mounting set up, similar
to the LT1 kits, but nothing like this was ever offered for the C4
Vettes.
Exhaust system
Headers:
Hooker super competition long tube headers , 1 3/4" primaries,
3" collector. Ceramic coated.
Piping: Starting
at the header collectors, there is a gradual collector cone that reduces
the 3" diameter down to 2 ½" over about 10 “
distance, connecting into true 2 ½ dual exhaust pipes. These
are smooth mandrel bent sections, with a custom X center section,
that allows cross-feed between the 2 sides, but does not neck down
the flow into an x merge, but merely joins the already parallel running
piping with an available crossover point.
Mufflers:
These are custom built, starting with flow master super 40 series,
they were modified for higher flow, and less internal deflection resistance.
The tail pipe tips are dual per side 4 “ that are full size all
the way into the mufflers. You can literally put your hand down these
tips & into the muffler. No flow restrictions here. The result
is a deep cam’d sounding rumble that is not to loud at idle or
cruise, but has that deep muscle car sound. Under heavy throttle,
it becomes much more aggressive sounding, being that of a mix between
a NASCAR and INDY car type sound. It has a very unique roar. It does
not sound raspy or poppy. It has been described as “wild”
or “wicked” sounding. Everyone will be impressed. AZ Automasters
hit the nail on the head with these mufflers!
Cooling system
Radiator:
Ron Davis racing radiator, all aluminum with 2 rows at 1.25"
each, grounded
Water pump:
Ac Delco aluminum pump, with modified impeller for 20% higher flow
Thermostat:
Stant super-stat 160 degree rating, drilled vent
Cap : secondary
16 # cap installed in upper hose, high point to eliminate all air
pockets
Air flow
: Stock cooling fan , low temp kick on, a/c condenser deleted, custom
aluminum side panels to seal all air from going around radiator, M1
Prowler air dam / deflector, featuring a deeper, steeper angle for
increase air flow, along with brake cooling ducts built in
Transmission,
4 speed auto. Az Automasters built Max performance 700R4
Highlighted
internals:
Trans Go
shift kit, including custom governor re calibration
Clutches:
All are high friction red Alto’s, with upgraded 8 disc 3-4 pack
Steels: Alto
black high temp Kolene
Band: Extra
wide 2 5/8" Alto red 2-4 race band
Sun shell:
Heavy duty “ Beast “ sun shell
Input drum: Best GM LS1 input drum , designed for C5 Vette / truck
Planets:
5 pinion Delco front & rear planetary gearsets
Torque converter:
custom full size 12" converter with 1800 RPM stall, high torque
stator, and Kevlar lock up clutch
Pump: Upgraded
to 13 vane with hardened high RPM “Unbreakable “ rings
Suspension system :
Springs /
shocks: Bilstien adjustable height coil over spring and shock set
up. Sport tuned bilstien shocks. Front springs are 425 # rating, rears
325 # rating. This combination gives superior balance, control and
stability over the stock transverse mono leaf system that has been
eliminated. The spring rate while definitely being stiffer than the
stock Z51 springs, are the perfect balance between being comfortable
enough for street use, while still being a road race capable combination
designed to control the heavier tire / wheel combo, while still adequately
utilizing the softer road race compound tires. Eliminates all cross
talk between sides that was an issue with stock mono leafs, going
over bumps, while cornering hard. Creates a true independent suspension.
The altered front rear weight balance was also taken into account
when choosing spring rates. Ride height has been set with corner weight
scales for best balance.
Bushings:
Energy suspension, polyurethane. All front & rear suspension bushings
have been replaced with this brand, and lubricated with thick silicone
grease. These are the best brand. They make no noise
Stabilizer
bars: Front is factory 32 mm solid, ZR1 bar, with Aircraft grade steel,
adjustable heim joint end link kits installed , poly frame bushings,
relocated for proper geometry due to lowered ride height. Rear bar
is factory 26 mm solid, ZR1 bar, poly frame and end link bushings.
Both are the largest bars ever offered for these cars from GM.
Rear control
arm mounts: The rear control arm mount to frame brackets have been
replaced with high performance Doug Rippie pieces . These change the
effective instant center of the vehicle over the rear tires, thereby
applying more down force to them under torque. Basically traction
brackets, they can increase the squat under load, adding increased
off the line traction, and increased grip, while accelerating out
of the apex of a corner.
Front control
arms: Custom set up. A somewhat unique mod that can only be done to
the early C4 Vettes is a secret among racers. By utilizing late model
C4 lower control arms & steering knuckles, but leaving the early
stock upper length arms in place, it create an even larger differential
between the already unequal length upper/lower control arm set up.
The benefit of this set up is it rolls in increased negative camber
during hard cornering, causing superior grip without having to run
horrible extreme tire wearing neg. camber in the alignment settings.
Rack &
pinion: Z51 tight ratio quick response steering rack, 2.25 turns lock
to lock. Poly mount bushings installed.
Wheels: All
wheels are 17 x 11" chrome, with screw in short valve stems to
eliminate centrifugal force failure at high speeds. The rear wheels
are factory lightweight OEM ZR1 wheels, with a higher magnesium content.
The fronts are lightweight aluminum ZR1 replica wheels that weigh
2 lbs more each.
Tires: Rear tires are 335/35R17. Fronts are 315/35R17. All are street
legal, DOT approved, Kumho Ecsta V710 road race tires. They have a
tread wear rating of 50. Traction is AA rating, & A temp. rating.
They have a very soft rubber compound, far superior in g force handling
grip than max performance summer tires. Capable of holding just over
2 G’s when warmed up, these tires are categorized as competition
level tires, but have tread. Good acceleration grip as well. While
tire wear isn’t the best, it is well worth the impressive ability
levels when at play.
Weight balance:
While in stock form the C4 Corvette has a good front to rear weight
bias, this car has been worked much closer to the 50/50 mark. Weight
reductions to the front include but are not limited to deleting the
entire a/c system, including compressor, condenser, lines, accumulator,
evaporative core, and housing. Battery removal, relocation to the
rear. In the rear, some of the weight that has been added include
a 40 lb. Safety roll bar assy., 2 stereo amplifiers located under
the carpet on the far aft wall of the storage area, and the rear storage
compartments over the tire area, have been converted as a dual purpose
sub woofer enclosures, and battery mounting compartments. Both compartments
have removable, sealed top panels under the carpet, & each contains
one 10" sub woofer, and one marine optima battery.
Alignment:
The settings are a great balance between street or road race use.
Due to the control arm set up in the front, camber settings are quite
reasonable, allowing good tire wear for street use, while some negative
camber is incorporated for high G cornering. Front caster is cranked
up quite a bit to increase high speed stability and road feel . Rear
camber is set close to zero, as of a lot of neg. camber isn’t
needed for good cornering considering the rest of the combo. Also
this close to zero setting leaves the rear tires flat with the road
for the best compromise with off the line drag race traction. Toe
is set at zero on all 4.
Brake system:
Rotors: Front
rotors are cross drilled and slotted 13" ZR1 size units. The
feature directional internal fins to pump cooling air while turning.
They are not full of holes, but have a modest amount for cooling and
out gassing, while still retaining a good amount of surface friction
area. The rear rotors are 11" and are slotted only. This is done
intentionally to increase the amount of surface area on the rear disks,
while the slots take care of the out gassing. All rotors have been
thermally cryo treated, for increased friction, and to prevent warpage
under extreme use. All are high quality steel, with over a 300,000
psi tensile strength.
Pads: All
pads are Performance friction racing pads, 00 compound. These provide
great initial cold bite, while ramping up the friction torque output
as they heat up under hard usage. This combination gives highly impressive
stopping power to both driver and passenger, especially coupled with
the extreme grip of the tires.
Calipers:
Fronts are stock ZR1 dual-piston , rears OEM single piston PBR with
cooling fins
Brake hoses:
All hoses are dot approved Teflon lined stainless steel braided
Master cylinder:
New ‘96 Corvette master chosen due to it’s slightly larger
internal piston diameter than all prior C4 masters. Custom rear brake
pressure line bias proportioning valve spring has been installed to
increase rear brake force over stock calibration.
Fluid: Super
blue ultra high temp racing fluid
Cooling:
custom front brake air duct tubing originates from the custom air
dam to add some extra air flow for cooling rotors & calipers
Rear end differential
Rear diff:
Dana 44 unit is installed, 3.42 ratio gears. Posi-traction is upgraded
with slightly stronger springs, and fresh clutch packs. Runs synthetic
gear oil. Carrier beam mount bushings replaced with poly.
Drive shaft/
halfshafts : stock aluminum, with H.D. Spicer U joints installed
Body enhancements:
Hood: stock
hood has been modified with open slots, with black screen adhered
to the underside for two reasons. The primary reason, reduction in
lift at high speeds, resulting in increased down force. Notable improvements
at speeds in excess of 120 mph. Secondary reason, to aid in engine
cooling, by helping otherwise trapped under hood air to escape, especially
at idle and low speeds, helping to keep the engine, supercharger,
& intake runners cooler , among other things. It also adds a unique
and aggressive improvement to the appearance.
Rear spoiler:
Custom hand crafted rear fin was constructed in layers of custom formed
aluminum sheet metal both riveted and fiber glassed to the rear bumper,
then fiber glass was layered onto & hand shaped to form a stylish
and functional rear spoiler. It’s main purpose is to increase
down force at speed and is quite noticeable starting at about 80 mph,
during quick lane changes, or evasive maneuvers, the rear is much
more planted.
Rear bumper
fascia: This replica rear bumper is made of fiberglass, not rubber
like the OEM part. It upgrades the looks to that of the ‘91 and
up C4 Vettes.
Rear fuel
door: Emblem has been removed, and hand grip to open door has been
fiber glassed smooth for a better more unique appearance . A hidden
rod is pushed to open fuel door
Front fender
vents: Upgraded to the ‘95-96 style. Holes have been enlarged
some for more radical appearance, and better air venting.
Mirrors:
Side mirrors have wind shields installed, that only came stock on
convertible models. These improve high speed aerodynamics, and reduce
cockpit wind noise.
Front marker
lights: Front turn, park, & fog lights have clear lexan plexi-glass
inserts that have been fabricated and installed. This is to aid in
aerodynamics, as well as appearance. On the front of these inserts
black metal mesh screen ( that matches the hood vent screens ) have
been installed. It gives a nice black out effect, as well as not interfering
with the light output, as opposed to a tinted lens. The turn sig./
park lights have been upgraded to the brighter amber krypton bulbs
& sockets used in the C5 Vettes. The fog lights have been replaced
with seperate 65 watt high intensity blue driving lights that have
been re wired to come on with the factory switch, without the headlights
being on or up. This was not permitted from the factory.
Headlights:
High intensity “Hella” headlights with replaceable H4 bulbs
are installed. They can beam out up to one mile on high beam. Separate
high power relays had to be wired in as of it was too much current
flow for the stock headlight switch to handle . They have one step
above the legal intensity installed now. Many choices are available
for the H4 size.
Audio system
Overview.
Sound system has enough power to hurt most peoples ears and still
be crystal clear, without distortion, and plenty of thumping bass,
all that sounds great at even 100 mph, with top off & windows
down over the wind noise. No part of sound system looks non stock,
other than head unit. There is also a bass boost control knob hidden
in the cup holder area.
Subs: 2 rear
hidden Rockford fosgate HE2 subs are mounted in the converted rear
storage compartments. The grills are aimed to fire directly at the
rear of the seats.
Rear speakers:
Custom fit into the stock location are 2 Pioneer 6x9 200 watt high
power 4 way speakers. Stock Vette grills are retained.
Door speakers:
Custom fit into the stock locations are 2 Pioneer 6" 150 watt
high power 3 way speakers.
Dash speakers:
Custom installed, there were never any speakers installed in these
dash pads, although GM put grill mesh there to give the look of them
being there. Installed are 2 Infinity 4.5 “ mids, with separate
tweeters, mounted in dash , with crossovers.
Head unit:
Pioneer DEH-P680mp unit. It has CD , MP3 player, with blue background
programmable display, will play graphics, and has infinite audio adjustability.
Removable face plate
Amps: 3 amps
on board. 2 mounted to rear storage area wall, hidden under carpet.
Mounted with large safety straps from outside of wall, for retention
in the event of serious crash. Rockford Power series amp powers subs,
pro series Profile powers rear 6x9's. Infinity accoustic amp mounted
under dash, against firewall runs door and dash speakers.
Gauges
Instruments:
All stock digital dash gauges remain fully functional Added components
that replace the center a/c vents are as follows: an electronic Autometer
analog style fuel pressure gauge, a LED vertical bar graph air fuel
ratio gauge ( not the round style that are always erratic and annoying
) , an amber shift light, and a vac / boost pressure gauge.
Fuel system
& management
Fuel pumps:
The intake pump consists of a high volume high pressure pump. The
secondary inline boost pump is a Vortech T-Rex pump, mounted to the
frame, & powered by its own dedicated relay.
Injectors
: Fuel injectors consist of 42 lb. Per hour units.
Computer:
ECM has custom programmed chip, in stock GM computer. Late model TPI
speed density system. Old maf system has been eliminated. Cold start
injector eliminated.
Starting
/ Charging
Starter:
High torque mini- starter, header has thermal wrap close to starter
area for further heat shielding
Battery:
Dual optima blue top marine starting batteries, wired in parallel
to double the available cranking amps are on board
Alternator
: Upgraded to newer CS style 140 amp unit, large case, with H.D. bearings.
Ignition
system
Coil: Accel
super coil, removed from housing, and installed in GM cap
Control:
MSD 6AL multi strike discharge system , with adjustable timing / boost
retard. Knob mounted in cup holder area , and can be concealed by
closing lid.
Ignition
cables: Taylor 8mm high temp spiro pro wires, with a spiral wound
core, blue
Safety devices
Roll Cage:
A four point 2 “ heavy duty .180 wall roll bar set up, with horizontal
harness bar is securely welded to the frame at all four points.
Roof brace:
A custom fabricated unique piece. This roof brace can be easily bolted
on when the top is removed, at the 4 top mounting points. This bar
not only looks cool, it reduces chassis flex much more than when the
stock top is installed, and adds a good safety margin of support if
the vehicle was ever rolled with the top removed, giving the wind
shield pillars much needed support, & preventing them from just
folding in.
Seats: Custom
Corbeau seats offer good density, so you can really feel the forces
the car generates, unlike the soft absorbing stock seats. These seats
wrap around you, and really hold you in place during radical driving,
especially when using the 4 point harness safety belts that are a
breeze to fasten & unfasten.
Roof Panel
Factory see
through smoked plastic glass top is included
Basic specs.
Horsepower:
650 @ engine
Torque: 610 ft. lbs.
Quarter mile time: 10.7 seconds @ 139 mph, 1200 ft above sea level,
75 degree F ambient temp
Top speed 190 mph @ engine redline
Fuel economy: 14 mph city, calm driving
Fuel required : 92 octane absolute minimum. 96-98 recommended. A mix
of 91 and 100 octane unleaded can be used. Cannot use leaded fuel.
Octane boosters not rec.
Recommended
eng. oil: Mobil 1 15w50 full synthetic.
Cornering
lateral G force: 2 G’s, with current tires, heated up
Braking distance: 80 mph to 0 = 80 ft.
Most impressive acceleration area: 80 mph punch to 160 mph, very strong
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