John Brett

John is a professional engineer with 50 years experience.

John has designed and built many cars, trucks, and vehicle assembly facilities.

John has worked on design of roads, bridges, cranes, transmission towers, and buildings, and operation, maintenance and upgrade of hydro and gas turbine power stations.

John was a LVV Certifier for 13 years. John has long been a whistle-blower, expressing the view that the LVV system is dangerously deficient. John’s authority was revoked in December 2012.

John rides a 1992 Yamaha FJ1200ABS, and is also a keen road and off road cyclist.


“The LVVTA has brought it to my attention that statements I have made in relation to it and its employees may have been perceived as defamatory.

I sincerely regret that and apologise for any harm caused. I have taken down the statements identified by the LVVTA of concern to it.

I have strong views about the low volume vehicle certification process and intend in the future to direct my energies into the public inquiry now being held in relation to it.”

John Brett 7th October 2015


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Suzuki Cappuccino- All power, no grip

Power without grip is nothing!

No matter how much horsepower you have at the wheel, it’s only the power you can get onto the ground that counts.

Tyres are what transmit the power to the ground, and the measure of grip is the “Coefficient of Friction” (usually called Mu).
This is the ratio of down force to Horizontal force.

A Mu value of 1 is about as good as car tyres on a good surface ever get.

This means that you could park on a 1 in 1 grade (45 degrees) without sliding.
This means that in acceleration, you could accelerate at a maximum of 1G if all your weight was on the driving wheels, (as in a dragster, motorbike, or a 4wd car)
This means that there is a practical limit to ¼ mile drag times, of about 9 seconds, no matter how much power you have.

This is worked out from the acceleration formula
T=square root of 2s/a , where T= time, s = distance(403 meters) and a= acceleration (9.81 m/s/s)

This link shows ¼ mile times of some very fast cars on very sticky tyres-
1/4 mile times

All those people who claim to have done faster times must have some MAGIC tyres, or more likely – slow watches.

There ARE ways of going faster though……….

Top Fuel Dragsters
This a whole other thing- these machines achieve 4 G accelleration with assistance from rubber on rubber grip, and aerodynamic downforce increasing grip
3.58 1/4 mile
Which is just plain old rocket science!

Or- if YOU want to accellerate this fast- just go to
Tower of Terror
Tower of Terror Video
This uses linear magnetic motors which give you 4.5 G accelleration, MORE than a Top Fuel Dragster, but without all the noise!

1 comment to Suzuki Cappuccino- All power, no grip

  • An outstanding share! I’ve just forwarded this onto a friend who had been doing a little research on this.
    And he actually ordered me breakfast simply because I discovered it for him…
    lol. So let me reword this…. Thanks for the meal!! But yeah, thanx for spending the time
    to discuss this matter here on your web site.

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