HOT CHIPS

HOLDEN COMMODORE VN SS V8 (Stage II)

Standard:

The standard VN SS Commodore is a quick machine, and comfortable too - but not smooth. The automatic transmission had a tendency to 'bang in' the next gear on upshifts (especially from first to second).

With Chip:

A rule-of-thumb with chip 'engineering' is: The bigger the capacity, the better the gain. It certainly worked for the V8 Holden - the SS showed improvement, with a smoother idle and the thump in the upshift thankfully eliminated. Shifts were also faster, resulting in faster times.

Powerchip says the SS chip liberates an extra 18kW (23bhp) at the flywheel (bringing power up to 183kW/245bhp) - one big gain. The increase in power can be felt in all ranges of

acceleration - from the first 30 meters (traffic light Grand Prix) to standing quarters and upper-gear punch. There's just more 'instant on' power available, with less lag at 'throttle mash' applications. Powerchip says the leap in power comes not from a remapped fuel delivery curve, but from more precise timing. Economy, therefore, is the same (unless driven harder).

Drive hard, and another feature of the Powerchip shows itself - a lusty 'deep throat' roar.

HOLDEN COMMODORE VN SS V8 (auto)


Stand Chip
0-100km/h 8.55 7.95
S 1/4 16.58 16.00
60-100km/h, 2nd 5.50 4.18
80-120km/h, 3rd 9.42 6.38

HOLDEN COMMODORE VP V6 (Stage II)

Standard:

The Holden V6 unit has always sounded a little harsh, but made up for this by being a willing revver and good performer. The times gathered for the standard set-up compared favourably with some of the other cars, so good gains were expected with the chip. Transmission shifts were a little a rough, and the V6 had a flat-spot around 80-90km/h.

With chip:

Fitted with the chip and air filter, the V6 took on a new feel. The idle improved, while gearshifts were smoothed out. The Commodore moved off the line faster, and now had wheelspin as an option. The redline was also extended by 900rpm to 5900rpm

(more noise than outright grunt at this height). Torque lock-up moved upstream (from 63 to 83km/h), and gave spectacular gains in 2/3 shifts and mid-range acceleration (good for passing or hill-climbing). Basically, the torque curve is now were it's needed most (see the 60-100 times)!

P-platers note: this V6 now SOUNDS like a V8 - just graft on some V8 badges!

HOLDEN COMMODORE VP V6 (auto)


Stand Chip
0-100km/h 9.31 8.80
S 1/4 16.54 16.37
60-100km/h, 2nd 6.75 4.95
80-120km/h, 3rd 8.55 6.83

6 - AR&T SUMMER 1995

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