Concours Restoration
Concours restoration back to original factory livery of Argento 25090A (silver) with Negro Franzi (black) interior
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I was very pleased to come across the very first Ferrari 330 GTC prototype on display in Las Vegas. Chassis number 6431 was originally built on a 275 GTS chassis and was apparently regularly used by Enzo Ferrari himself. The car has dozens of detail features not seen on any other 330 GTC.
We know from service records that this engine had been rebuilt back in the 1980s and has been driven very few miles since. Unfortunately, the quality of the rebuild leaves much to be desired, and we therefore have a full rebuild underway. Inappropriate valve springs were used, resulting in coil bind, the valve stem to guide clearances are huge (over .004″), and piston skirt clearances range anywhere from .004″ to .009″. One of the most telling signs that this car did not receive the engine rebuild it deserved was the presence of a knurled piston. Knurling pistons is an old school practice designed to give extended life to worn pistons. Knurling a piston skirt actually helps ‘take up the slack’ in the case of loose skirt clearance, but the high spots created by the knurling process wear very quickly, so the remedy is very short lived. Despite the use of the knurled piston, the skirt clearance in that particular cylinder was .009″, or .005″ out of spec.
Seatback work
Repair and reconstruction of
left front fender/ quarter panel
Headlamp locating ring fabrication
Final fitment of front fenders and nose
prior to priming and installation
Front bumper mounts and nose panel mounts
Nose panel mounting bracket
Engine bay panels and front superleggera
framework primed
Priming of front fenders
Nose panel ready for installation
Installation of nose panel assembly
Installation of front fenders
Trial fit of hood prior finalizing
nose placement
Installation of rear cowl panel
Trunk floor completed and
ready for installation
Engine bay panels
completed and installed
Factory from shock tower upgrade
Rear quarter panels and
tail panel installed
New nose primed and fit to chassis
Rebuild of tail panel assembly
Disassembly of rear bumper/
fuel tank mounting assembly
Installation and repair of fiberglass floor,
footwell and firewall panels
Seam sealing of floor pan,
footwell and firewall pans
Floor assembly,
footwell and firewall primed
Inside of rear quarter panels, tail panel,
and interior close out panel primed
Trunk floor panel support brackets, fit,
primed and ready for installation
Rear cowl panel primed
and ready for installation
Rocker panel installation
Rear quarter panel repairs
Rear wheel close out panel installation
Seam sealing inner rocker close out panels
Fitting doors, rear quarter panels,
and tail corner panels
Trunk floor construction
Right rear quarter panel repairs
Previous primer failure after media blasting
Preparing chassis for primer
Chassis primed
Fitting of new engine bay close out panels
New flange panel for rear cowl panel
Rear wheel well close out panel construction
Trunk floor reconstruction
Continuation of rear roof and cowl sub panel repairs
Rear wheel well replacement panels
Left engine bay close out panel reconstruction
Engine bay close out panel reconstruction
Rear roof and cowl sub panel repairs and fitment to body
Rear wheel arch panel removal
Rear shock tower gussets and installation
Rebuild of outer rocker substructures
Inner rocker cover panel replacement
Rear Shock tower cover panels
Engine bay side panel reconstruction
Rocker Substructure reconstruction
Engine bay close out panel
New nose panel fitting and repair
Body panels refit to the chassis for evaluation prior to panel work
Forward picture frame has been removed
for repair
Plotting the location of the upper shock mount
New lower engine bay brace fabricated and
welded in place
This section has suffered damage from both
impact and corrosion
Frame is now symmetrical, straight and sound
Forward picture frame has lost its symmetry
Double walled chrome-moly tube now welded in
place for rear shock mounts
Transaxle will be fully rebuilt
The following sequence of photos show the transaxle rebuild underway and also Jake repairing and reinforcing the front and rear shock mounts.
Upper front shock absorber mounts will be
repaired and reinforced
Jake welded a piece of angle iron behind the shock
mount panel to add strength
All surface rust was ground away before being
sealed and coated in Wurth Body Wax
Removing the front right mount revealed minor
rust lurking behind
Welding the reinforced panel in position
Rear shock bar has been reconstructed using new,
heavy walled chrome moly tubing
Setting cam timing
Using infrared beam to ensure rear shock bar is
perfectly straight and level
The first new panels being fabricated
Restored oil pan and baffle
I am delighted to report that Jake now has the Ferrari body restoration underway.
Assembling the short block and installing the rebuilt cylinder heads.
Torque plate honing the cylinders to final size
Hanging rebuilt rods on the pistons
Honing rod wrist pin bushings to size
Balancing the flywheel and clutch
Pressure testing with custom head gaskets trial fitted
Heads now full rebuilt and ready to install
Assembling the cylinder head and setting valve lash
We have now received your custom forged pistons. It's always fun to see the finished product when so much work has gone into the design and production behind the scenes.
Corey has been busy designing and machining a piston mold from which a new set of custom forged pistons will be made.
Heating block in oven to aid removal of seized studs
Custom Ferrari V12 torque plate
Setting up for align hone with cylinder heads
bolted in place beneath block (essential)
Squaring main caps prior to performing a much
needed align hone
Magnaflux checking rods
Honing rod housings
Setting up to hone new pin bushings
Surfacing one of the cylinder heads
Preparing to trial fit main bearings
Rods now fully rebuilt
Machining for new valve seals
Honing new valve guides
Pressure testing the engine block
Measuring head cc
Complex timing chain idler sprocket
Ferrari rods of the era had the weight stamped
on them - in this case 514g
Weighing connecting rods after cleaning
Damaged timing gear
Timing gear idler assembly
Water pump bearings and gear badly worn
Crack in oil pan rail
Custom torque plate
Scary looking banjo bolt
Badly installed thread repair for oil pan drain plug
Oil pan has several previous weld repairs
Repaired pan looking virtually new once more
Several cracked/damaged fins will be welded
and reshaped
Disassembling the cylinder heads
No to valve jobs were the same!
All the valve seats had different widths
and heights
This line clearly visible on the bottom coil is
evidence of coil bind
This cylinder had .009" skirt clearance!
Pressure testing cylinder heads
Valve stems measured inconsistently
Stem to guide clearances were huge
Knurled piston is cost saving old school
practice
Engine tear down underway in the CJ machine shop.
Strong fuel smell in oil pan
First head removed
Signs of fuel wash and scuffing on pistons
and cylinder bores
The prototype Ferrari 330GTC
Koni have done a stellar job rebuilding
your original shocks
We have now received the restored fuse board and superb quality wiring harness that was made for us in Italy. It really is a very impressive piece of kit.
The original fuse panels have been restored
and completely rewired
Suspension and brakes will be completely rebuilt
Every terminal has been carefully labeled
Road springs will be replaced, Koni shocks
will be rebuilt at the Koni factory
Separating the springs and shocks
Back from being media blasted to back to bare metal, a few minor rust issues are exposed, and also evidence of some sub-standard 1960's Italian bodywork.
The Borrani factory in Milan have done
a fantastic job with your wheels!
Preparing the Ferrari for blasting back to bare metal..
Fiberglass dash/firewall is first to be removed
Framework of the dash exposed
Panel has slight damage around transmission
mound that will be repaired
Removing the fiberglass dash and floor pan in order to gain full access to the chassis..
Hundreds of rivets hold the floor pan and front
and rear bulkheads in place
Panel beneath rear window is aluminium
Removing rear window panel/upper rear bulkhead
Rear panel now removed
Removing pans was essential to gain full access
to the chassis
Main floor pan now lifted away
Chassis will be blasted back to bare metal, repaired
and refinished to new condition
Many rivets were broken or corroded
Lowering the 5 speed gearbox to the ground
Unusual view from beneath the car with the
floor pans removed
Chris Scarborough carefully extracting the compact
V12 from the engine bay
With the gearbox out of the way, removal of
the engine is a simple matter
Engine is angled in order to clear the firewall
on the way out
With the engine on the ground, the mechanical
tear down is almost complete
Almost clear...
Front suspension now removed
Removing rear suspension
Tear down continued, a glittering new Borrani wheel, and unspent shotgun cartridges hidden beneath the gas tanks...
Left rear strut mount
Note thick bondo lurking behind front bumper
Unspent shotgun cartridges, Italian newspaper
clipping, glue, lipsalve and screwdriver
Strange assortment lurking beneath gas tanks
Right rear strut mount slightly damaged and pushed
upward, causing car to ride low in right rear
Glittering new RW 4039 Borrani spare wheel
Tear down, continued...
The only significant rust so far..
Drain hole in left bumper tube requires minor
rust repair
I am pleased to report that this important restoration is now officially underway!
Next task is to remove the rear suspension
Some photos are for reference purposes only
First task is to remove all the glass and interior
Jake and Carlos double teaming the front
windscreen removal
One last inspection by the proud owner before we get this project underway!
One last opportunity for the proud owner to see the
car whole before the restoration gets underway