AT SPEED MOTORS / WORKSHOP JOURNAL

Inside the
workshop.

Mechanical preparation at At Speed Motors, caring for a survivor from engine-out servicing to final setup.

Stainless heat exchanger and open exhaust outlet beneath the engine

STAINLESS STEEL / A VIEW FROM BELOW

Making room.

The car on the lift. The engine on the trolley. A familiar shape begins to reveal the machinery underneath.

Metallic green Porsche 911 S beside a workshop lift — 01
At Speed Motors
The green S arrives at the lift, ready for the engine-out work.
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Mechanic lowering the drivetrain beneath the raised 911 S — 02
Lowering the drivetrain
The engine and gearbox come down together onto a trolley, opening up access to the rear of the car.
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Empty rear engine compartment beneath the raised engine lid — 03
Room to work
Behind the rear seats, the empty compartment awaits the flat-six. The open lid frames a view normally filled by the engine and its air cleaner.
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Mechanic reaching up beneath the raised car — 04
Working underneath
With the car overhead, the underside is within reach for cleaning and close inspection.
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The flat-six, up close.

With the engine removed, the fan drive, intake linkages and cooling tinwork are exposed for servicing.

Cooling fan and engine covers on the removed flat-six — 05
Cooling at the center
The belt-driven fan sends cooling air over the engine. Beside it, the covers and surrounding metalwork are accessible with the flat-six out of the car.
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Engine fan, drive belt and lower pulley on the workshop trolley — 06
Fan, belt and pulley
The fan dominates this view. Below it, the crankshaft pulley drives the belt that turns the fan and alternator.
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Exposed fuel lines and intake hardware around the cooling fan — 07
The mechanical arrangement
Fuel lines, intake hardware and linkages surround the fan. These are the working parts behind the S’s mechanical fuel injection.
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Mechanic working beside the engine with black air-cleaner housing fitted — 08
Hands on the flat-six
The black air-cleaner housing is back above the engine as work continues around the intake assembly.
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Mechanic reaching across the side of the engine on its trolley — 09
Access from every side
With the engine on the trolley, the cooling tinwork, exhaust connections and intake assembly can be inspected before refitting.
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MFI drive renewal

Beneath the bodywork.

Usually out of sight: the brakes, steering connections, gearbox supports and heat exchangers that keep the car working as a whole.

Front brake disc and red KONI strut housing with wheel removed — 10
Brakes and KONI Reds
A new front brake disc beside the refinished KONI strut housing—two parts of the chassis refresh.
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Brake refurbishment

Tie-rod end attached to the red steering arm beside the front brake disc — 11
The steering connection
The tie-rod end links the steering rack to the wheel’s steering arm. Its joint allows movement as the wheel steers and the suspension travels.
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Steering work

Removed transmission crossmember with mounts laid alongside it — 13
The crossmember, removed
The removed crossmember and mounts can be examined together. The mounts support the gearbox while isolating vibration from the body.
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Installed black crossmember and mounts beneath the ribbed gearbox case — 14
The crossmember, back in place
Now installed beneath the ribbed gearbox casing, the refurbished crossmember carries the transmission on its mounts.
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Crossmember refurbishment

Coming together.

The flat-six returns to its place behind the rear axle. There is still work to do around the installed engine and underneath the car.

Engine reinstalled in the green 911 S with trolley underneath — 15
Back in the chassis
The flat-six is back behind the rear axle, with the lifting trolley still beneath the car.
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Reinstalled cooling fan and air-cleaner housing in the green engine bay — 16
The engine bay, filled again
The fan and black air-cleaner housing return to their familiar positions beneath the rear lid.
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Mechanic leaning into the engine bay over protective bodywork covers — 17
Attention to the engine bay
Protective covers drape over the rear bodywork while the mechanic works around the installed engine.
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Assembled front suspension with red KONI strut housing and brake disc — 18
The front end, assembled
The red KONI strut housing and steering arm stand out beneath the car, with the brake disc and steering linkage alongside.
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Fit and final tuning.

The old muffler looked much like the right part. Its fit was another matter. A factory-correct replacement now sits beneath the engine, while Rich adjusts the injection settings following the valve adjustment.

Removed rear muffler and curved exhaust outlet on the workshop floor — 39
The muffler that came off
The removed silencer rests on the workshop floor. Its shape resembles the stock unit, but its fit and position prompted the replacement.
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Stock rear muffler replacement

Gray replacement rear muffler fitted below the engine of the raised 1973 Porsche 911 S — 40
The replacement, fitted
The new factory-correct rear muffler is installed beneath the engine. With the rear bodywork still apart, its gray finish and mounting position are clearly visible.
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Stock rear muffler replacement

Rear quarter of the green 911 S with its engine lid raised and protective cover around the engine bay — 41
The engine during MFI tuning
The flat-six is back in the car, with the engine lid raised for access. Following the valve-clearance adjustment, Rich is working through the mechanical fuel injection settings.
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Final MFI tuning

THE CONTACT SHEET

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41 photographs

Mechanic beside the rear of the green 911 S — 02
Preparing for the lift
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Engine underside and heat exchangers before removal — 03
Before the engine comes out
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Red rear shock absorber beside a heat exchanger — 04
In close quarters
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Transmission crossmember beneath the gearbox — 05
The gearbox support
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Floor pan viewed from beneath the car — 06
The floor from below
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Front suspension and steering behind a fitted wheel — 07
The front end, before
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Removed engine viewed diagonally across its fan and intake hardware — 10
The engine, uncovered
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Opposite side of the removed engine with intake hardware exposed — 12
Around the other side
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Open front wheel well with suspension components removed — 13
Inside the front wheel well
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Open front luggage compartment with lining lifted back — 14
Under the front lid
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Front of the green 911 S with luggage lid raised — 15
A familiar face
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Empty engine compartment viewed from below — 16
Looking up into the engine bay
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Mechanic working at the open front wheel well — 20
At the front corner
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Open front wheel well with parts arranged on the yellow lift arm — 21
Parts within reach
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Front brake disc and red strut inside the green front wheel arch — 22
Front brake and strut
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Engine on a trolley behind the raised green Porsche — 24
Car and engine, apart
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Side of the raised Porsche with rear wheel removed and brake disc exposed — 30
The rear corner
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Installed engine case between two stainless steel heat exchangers — 33
The flat-six from below
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Close view of engine case and adjacent stainless heat exchanger — 34
Case and heat exchangers
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Front steering and suspension beneath the floor pan — 35
Across the front axle
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KEEP EXPLORING

Every part has a purpose.

Factory specifications The service history The workshop films

Inside theworkshop.

Making room.

At Speed Motors

Lowering the drivetrain

Room to work

Working underneath

The flat-six, up close.

Cooling at the center

Fan, belt and pulley

The mechanical arrangement

Hands on the flat-six

Access from every side

Beneath the bodywork.

Brakes and KONI Reds

The steering connection

Stainless steel heat exchangers

The crossmember, removed

The crossmember, back in place

Coming together.

Back in the chassis

The engine bay, filled again

Attention to the engine bay

The front end, assembled

Fit and final tuning.

The muffler that came off

The replacement, fitted

The engine during MFI tuning

Take another look.

At Speed Motors

Preparing for the lift

Before the engine comes out

In close quarters

The gearbox support

The floor from below

The front end, before

Lowering the drivetrain

Cooling at the center

The engine, uncovered

Fan, belt and pulley

Around the other side

Inside the front wheel well

Under the front lid

A familiar face

Looking up into the engine bay