GILES MORTIMER XR FALCON

GILES SOON REALISED THAT IF HE WAS GOING TO KEEP UP WITH THE COMPETITION, THE XR NEEDED A SHOT IN THE ARM

STORY TAS MCMILLAN PHOTOS JORDAN LEIST

EXTERIOR:

The only external visual cue that this is more than a neat cruiser is the 100L aluminium drop tank, though Giles swaps the rear tyres for 225/50/15 drag radials on race day. I sacrificed tyre size for not molesting the body, he says. I like the sleeper look; it looks like nannas car!

ENGINE:

The engine bay is the only part of the XR that needed paint after Giles bought it. I had the intake milled down so I could fit everything under the bonnet, he says. Ive acquired another bonnet to cut up so I can run a decent carb spacer for racing. It should be worth another 70hp at the tyres!

IF YOU spotted Giles Mortimers XR Falcon on the street, youd be forgiven for thinking it was a neat cruiser, probably powered by a mild 302 Windsor with barely enough grunt to pull the skin off a delicious rice pud. And youd be very wrong. Beneath the unmodified bonnet of this unassuming resto sits a 408-cube Clevo built to handle the rigours of burnout comps.

I was after an XW or XY, but a bloke in Waroona sent me some pictures of an XR he had, says the West Australian. I showed a friend and he told me to grab my money, get in the car and go buy it!

Giles handed over the folding stuff and returned with this mint XR in tow. The original six-banger and related driveline bits had been chucked in favour of a 289, C10 and nine-inch combo, and with 202hp at the tyres, it was enough fun for Giles for a few months. I took it to Racewars Cash Days and got thrashed by everything, but it was fun and the bug bit, he says.

Of course, Giles soon realised that if he was going to keep up with the competition, the XR needed a shot in the arm. The baby Windsor was thrown into the shed and replaced with a 351 Clevo wearing a Yates top end, which spat out 360hp at the treads. A few months before Racewars 2018, the C10 started to slip badly, so Giles swapped it with a tough C4 with a manual valvebody built by Perths FAT Transmissions.

Racewars 2018 was pretty hard on Giles and the XR; he drew Tim Nelsons UNCIVIL XA coupe (SM, Aug 16) in the first round and lost to the green methanolswilling monster.

Undeterred, Giles began the hunt for even more power and discovered that a friend was looking to shift the 408-cube stroker Clevo from his burnout car. Giles offered to trade a Harley 1200 Sportster Custom for it and the deal was done.

INTERIOR:

Though the XRs mostly stock inside, the B&M shifter, fire extinguisher and smattering of Speco gauges hint that theres something more going on.

My mate Gavin Chiesa died a few years ago, so I keep a photo of him and his HR in the glovebox. Hes been to every Racewars with me, Giles says

IVE FIXED THE THROTTLE; NOW IVE GOT FULL NOISE IM ITCHING TO SEE WHAT IT DOES!

GILES MORTIMER 1967 XR FALCON

ENGINE

Type: 408ci Cleveland

Induction: CHI 3V, Quick Fuel E85 950cfm

TRANSMISSION

Gearbox: Full-manual C4, 3800rpm Dominator

Diff: 9in, 3.55:1 S

USPENSION & BRAKES

Front: Lovells springs, Monroe shocks

Rear: Reset leaves, Monroe shocks

Brakes: Wilwood 280mm discs and four-pot callipers (f), stock drums (r)

WHEELS & TYRES

Rims: 14in five-slots (f & r)

Rubber: 215/60/14 (f & r)

South Street Auto Repairs in Perth built the 408 with a Scat steel crank, a big Crane solidroller, Lunati lifters, Trend pushrods, CHI 3V heads, Crane rockers and stud girdles. The two-bolt mains are strapped together with a stud girdle to help keep everything straight when Giles spins it to 6900rpm, and a Canton sump and Melling pump supply the slippery stuff. The engine chugs a steady diet of E85 distributed by a 950cfm Quick Fuel carb and a CHI single-plane manifold. The exhaust is the same twin 2.25-inch as the 289 from the headers back, so Giles is confident there are gains to be made there.

Giles commitment paid off at Racewars 2019, where the XR decimated a couple of wound-up late-model Falcons, imports, and an HK Monaro with a 400 Chev. I couldnt get full throttle at the time, so it only ran 176km/h at 6300rpm, but it just hooks up, he says. Ive fixed the throttle so I want to take it to Perth Motorplex; now Ive got full noise Im itching to see what it does!