FOXSAKE Barra-powered Fox-body Mustang

If you don’t mind our saying so, Street Machine Drag Challenge has been a runaway success since its inception in 2014. Everyone who tries it loves it, and that extends to our valued sponsors, most of whom have been supporting the event for a good many years.

First published in the September 2022 issue of Street Machine

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Jason did plenty of research to end up with a mix of parts to ensure FOXSAKE has the right stance. Viking coil-overs at each end combine with a tubular front crossmember and 2in drop spindles to ensure the body is slung low over 15x4 front and 15x8 rear Weld wheels, the latter wearing Enemies Racing Australia beadlocks and 235 drag radials

One such sponsor is Tuff Mounts – purveyors of fine, Aussie-made engine mounting hardware – and while proprietor Jason Waye has been a keen backer of Drag Challenge since 2016, he has never been content to sit on the sidelines.

“I love Drag Challenge because it’s relatively fresh here in Australia, and it provides a platform to prove that our products really work,” Jason says. “It helps competitors understand what we’re about, and there’s a great sense of camaraderie that only comes from getting away from work to do stuff we all enjoy. It’s a week of awesomeness; driving, fixing and racing cars and helping out others along the way.”

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After piecing together a 10-second Barra-powered VS Commodore ute for the event some years back (SM, Sep & Nov ’17), Jason became aware that Barra Fever was sweeping the United States of America, and reasoned that there would be significant demand for a Barra conversion kit to suit what is arguably America’s most popular drag racing platform, the Fox-body Mustang.

With that in mind, he managed to source a grandma-spec, 2.3-litre four-pot-powered ’89 Muzzy from Warrnambool, Victoria, and used it to engineer a comprehensive Barra-into-Fox-body kit. He then figured that a turbo Barra-powered Fox might make for a fairly handy small-tyre tearer in the aptly named Tuff Mounts 235 Blown class at Drag Challenge.

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Like most recent projects, FOXSAKE was somewhat delayed due to the impact of the spicy cough, but it was a relatively straightforward build. Step one was mounting the engine and transmission, which was naturally handled in-house at Jason’s workshop, Muscle Garage in Adelaide. The suspension side of the equation was fairly simple, given the vast array of aftermarket options available for the platform.

“We started studying and talking to the Americans about what they were doing to get their cars down the track, but also to get the right aesthetic,” Jason says. “Fox-bodies either look great or they don’t, and it’s all about the stance. We set the car up so it looked right, and then built the suspension around that.”

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Here you’ll find the battery, the tail end of the ’cage and the Enemies Racing Australia anti-roll bar. There’s still plenty of room for luggage – an important consideration for Drag Challenge – as the fuel tank and twin Bosch 044 fuel pumps are mounted below the floor. On the subject of fuel, the Mustang returns an amazing 10L/100km on the highway

Jason opted for a UPR moly-tube front end wearing Viking coil-overs and Team Z two-inch drop spindles. The rear end uses standard pick-up points with aftermarket arms, Viking coil-overs and an Enemies Racing Australia anti-roll bar. The diff is a bulletproof 40-spline nine-inch with 3.5:1 gears and a full spool – far heavier duty than the Mustang requires with its current stock-bottom-end Barra, but it was all about future-proofing the car. “We’re hoping to build a motor for it down the track and make 1000-1200rwhp, and we shouldn’t need to do much aside from suspension tuning,” Jason says.

At that point, the Fox was shipped off to Adam and the boys at MPW Performance in Melbourne for the bulk of the fab work, including the rollcage, mounting and plumbing the intercooler, and building the exhaust system and the parachute mount, before returning to Adelaide to have the body coated in the factory Oxford White by 3R Technik.

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Aside from what you can see with your own two eyes, the FG Turbo-spec Barra is bone-stock, save for the usual boost-proofing mods of Dominator Motorsports valve springs and oil pump gears, and an Athena MLS head gasket. That you can readily and reliably coax 690rwhp out of a Barra just with bolt-ons and careful tuning goes a long way towards explaining the popularity of the Aussie Ford six

In went the Haltech Elite ECU, which was wired up using a terminated loom, employing a bunch of sensors and engine protection trickery. “I focused a lot on that stuff because I was conscious of looking after not only the SBE engine but also the built engine that will go in down the track. I didn’t want to have to worry about adding that stuff later on,” Jason says.

Impressively, most of the interior, including the carpet, headlining, door trims and plastics, is all factory-issue stuff in original condition. Jason got super lucky; not only was the car in great condition for its age, but it also came in a particularly cool factory colour combo. All that needed to be retrimmed was the factory rear seat and the Kirkey fronts, which was a hell of a win. Aftermarket additions include the Haltech iC-7 dash, B&M Pro Stick shifter, Velo harnesses, and a marvellously era-appropriate Momo steering wheel.

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The car was then shipped back to MPW so Adam could apply the finishing touches, corner-weight it, bolt it to the hub dyno and carry out the tune. Other than the usual supporting mods of valve springs, oil pump gears, head studs and an MLS head gasket, the motor is a bone-stock FG Turbo Barra. The externals are a different story, however, with the main party piece being a BorgWarner SXE369 turbocharger perched atop a Jonny Tig turbo manifold with a Turbosmart wastegate. There’s also a billet Plazmaman inlet manifold and air-to-air intercooler, and twin Bosch 044 fuel pumps supplying E85 to a set of 1250cc squirters. Pretty straightforward stuff, but enough for a properly healthy 690hp at the hubs through a Turbo 400, as it turns out.

Soon thereafter, it was time to debut the car at the Tuff Mounts Holden Nationals at Heathcote Park Raceway. Some issues with the transbrake hampered progress, but the car ran into the 10s multiple times off the footbrake, which was a solid shakedown for the car and for Jason ahead of Street Machine Drag Challenge Weekend, where he really got the chance to lean on it.

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“Drag Challenge Weekend was surreal!” says Jason. “I didn’t have space to haul much in the way of spares or tools, and I’d never driven the car on the road prior to the event. We started out in the 10s and struggled with traction early on, but the car ran well and averaged 10 litres per hundred kilometres between tracks, which was great. At Heathcote on Day Three we ran into the nines, and then the car just kept getting better. We didn’t go backwards at all across the weekend and ended up with a PB of 9.4@146mph, and finished third in class. I couldn’t have asked for a better debut event for the car!”

Mid-nines are super impressive for a stock-bottom-end street car on 235 radials, but Jason is quietly confident there’s more to be had out of the current combo before he makes the move to a built engine.

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At Drag Challenge Weekend 2022, the Mustang clocked a PB of 9.4@146mph on 235s, while making just shy of 700hp at the hubs and weighing in at 2736lb. Jason and tuner Adam Rogash from MPW Performance hope to improve on the car’s 1.46sec short time, coupled with some more refinements in the hunt for an 8sec pass. Then they’ll ditch the SBE Barra, insert a built motor and wind up the boost

“Adam and I want to get the car to Sydney Dragway and see how far we can go as it sits,” he said. “We’d love to get it into the eights if we can get it off the line a bit better; that would be pretty impressive for an SBE car. Hopefully we can do that before Drag Challenge this year, and after that we’ll build a motor for it.”

It’s enough to make a bloke want to build a Barra-powered Mustang, to be honest…

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JASON WAYE
1989 FORD MUSTANG

THANKS
Tuff Mounts; Muscle Garage; MPW Performance; Haltech; Turbosmart; 3R Technik; GCG Turbo; Quality Motor Trimmers; Enemies Racing Australia; Dominator Motorsports; Jonny Tig Industries; Plazmaman; GJ Drivelines; Mackielec Industries.