This is a series of photos showing the installation of the CB Performance Quick-Tune EFI in my 1966 VW Bug. The EFI is a complete kit (minus fuel line plumbing). This replaces a pair of Weber IDF 40's, which were too restrictive at higher rpms for an engine this size, even with larger 32mm venturis.

Engine Specs:


The CB Quick Tune kit

The brain box and O2 sensor

Test fit the intake manifold and throttle body

Test fit the intake manifold and throttle body

I removed the engine so I would have room to work

Prep for Cylinder Head Temperature (CHT) sensor, which is mounted in head near #4 cylinder

Hole drilled for CHT sensor

CHT sensor mounted, checking rocker arm clearance

Trunk area, getting ready to remove fuel tank

Fuel tank removed. I ended up replacing the brake fluid resevoir with one that mounts on the master cylinder - see later photos

Locating the new electric fuel pump

Locating the fuel pressure regulator - CB says this should NOT be mounted in the engine compartment due to heat

Trial fit new "36hp" fan shroud, needed to clear injectors

Oil cooler ducting needs 1/2" extension to clear Type 4 cooler

Going to route two 3/8" steel fuel lines underneath in this channel

Hardline exits the channel and converts to flex hose in the back - much easier to route

Stainless hose clamps bolted to the channel

Hardline converts to flex hose in the front too

Electronics go underneath the rear seat (CB "brain box" and O2 sensor electronics)

Big hole drilled and wiring laid out

Engine compartment cleaned up

Dynaliner sound deadening installed

Fuel supply and return bulkhead fittings on passenger side

Engine tin powder-coated flat black

Engine tin powder-coated flat black

Type 4 oil cooler with foam sealing strips to prevent air leaks

Fuel injectors, fuel rail, and pressure gauge installed to throttle bodies

Fuel injector wiring has to be routed this way or it will interfere with fan shroud

Trial fit in engine compartment

A lot of wires on the driver side!

Ground wires attached to a common point on engine case

Fuel supply and return lines. Vacuum line goes to FPR behind wheel well

O2 sensor goes in exhaust and cable attaches to rear apron

Routing O2 sensor cable along fender well

And up along with main wiring harness to rear seat area

Throttle bodies installed, fuel lines and vacuum lines connected

Close-up view of MAP sensor

Close-up view of fuel pressure sensor

Magnecor KV85 spark plug wires installed to minimize electrical interference

Heater tubes installed and wiring organized

Mounting fuel pump and fuel filter. Also see new brake fluid resevoir

Close-up view of fuel pump connections

Zip-tied fuel filter. Hard to mount without kinking the hose

The fuel tank gets a T fitting for the supply and return lines. Braided hose and AN fittings are nice to work with!

Quick-Tune software running on my laptop, with engine running. Now the tuning begins!

Playing with the Air-Fuel Ratio (AFR) settings in Quick Tune software