This may only be a mild boost application, but remember the engine internals are left untouched and, after heavy testing, APS' own data shows that Nissan has rather over-engineered the VQ engine for a possible power increase at a later date.

The compression ratio of 10.3:1 is quite high for any turbo motor drinking premium unleaded. APS have countered this with the use of a large, bar-and-plate, twin-entry intercooler, anda uniquely upgraded fuel system. Utilising a 700 hp Walbro pump and 4-Bar fuel pressure regulator (3.5-Bar as standard), APS 500 cc injectors mate with their own loom to avoid any cutting or soldering of the original injector loom.

A UNlchip plug-in computer monitors boost pressure and ignition mapping. The only engine modification is the fitment of an APS 7-litre sump that helps reduce oil temperature and comes with twin oil return drains for the turbos.

So what's the result? Well considering a standard 350Z will push out a respectable146 kW to the treads, David's Zed is now cranking out an impressive 300kW to the ground. That's well over15 kW per pound of boost pressure! Remember, this is a completely street legal car designed for every day use. But it's not just the peak power figure that tells the story - leaving the engine's compression ratio as standard has resulted in an extremely driveable car, as there's no lag to speak of. David comments that the car punches from any point in the rev range, and has a huge torque band. "In general every day use the fuel economy is good, if not better than before. There's much more torque, thereby enabling the use of higher gears - I'm using sixth a lot more. On a recent road trip to Sydney, the car used approximately 80 litres of fuel. You could say it has a range of approximately 700 km per tank, which is pretty dammed good."

Since the addition of the twin turbos, David has ventured to Calder Park where he found that, like many factory clutches, the 350Z's was the least forgiving part of the drive train. I caught up with David the night he raced the car. "It's not designed for this much power as I've obviously found out tonight." Easing it off the line, David still produced a tidy time slip reading in the thirteens (The Nissan ran 14.4 at 96.8 mph in N/A guise). "The clutch was really slipping badly in second and third gear on the last pass, so I had to short shift it. With a good clutch I'm confident it'll run a low 12. The APS test car ran an 11.98 running at 9 psi." At the time of writing, David had just fitted an APS triple-plate carbon unit to a significantly lightened flywheel, before finishing this upgrade with a short shifter (25% decrease) from Rogue Engineering in the US.

David is quick to point out that he didn't build the car for Straight line activities. The twisty stuff is what the 350Zchassis is renowned for. The big Nissan is home to many upgraded Nismo parts including the suspension. Nismo S-Tune coil-overs Lower the body a sensible 20 mm and render a classic stance Without compromising ride quality. S-Tune front and rear sway Bars are also fitted, while David sourced a sweet enhancement From the USA in the form of a set of Rays Engineering Nismo LM-GT4 lightweight wheels. Measuring 18x8.5-inches up front and a wide 9.5-inches down back, 245 front and beefy 275 rear tyres do a great job of transmitting the Zed's broad torque band to the tarmac. The GT4's are also the lightest forged aluminium wheels Rays Engineering makes in an 18-inch, while the body kit is mostly Nismo (the Aero-spec kit). David wasn't keen on the rear bar, so he's added a modern touch in the form of the C-West carbon fibre guard pods. "Most of the Nismo parts are available through Nissan, but I purchased mine over seas as it's much cheaper. It really pays to shop around," David adds. As David's 350 is the Track Spec version he was lucky Enough to receive the Brembo brake upgrade as standard equipment. Combined with some Endless pads, David adds that braking cohesion is more than adequate, even with the vast power Increase.

Peering into the cockpit conjures up images of how Comfortable this car would be to drive hard. David had Ideal Seat Company bolt in the Recaro SRIII bucket seats. They look So factory that you just assume the yare. Also snugly fitted is An array of products from Defi. The Defi instruments are among Some of the funkiest-looking in-car accessories on the Market today and David's got a Defi Link controller II, Link BF boost, fuel pressure, oil temp and sensors, water temp, oil pressure and of course the Defi Link display.

So what's next on the agenda for the Nissan, David? "Now that the new clutch is in, I'm looking forward to some more track time. It's really at home on a quick circuit like Sandown. This car has far exceeded my expectations as far as enjoyment and excitement. The two-year journey has been just great and I hope it will continue into the future. If I ever get bored with it, Maybe I'll look at some forged internals and up the boost, but I think that time is a long way off yet."