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The Alnor Velometer Jnr

Posted on May 23rd, 2004 in Opinion by Julian Edgar

I have always liked gauges and instruments. My first car – an air–cooled Honda Z – gained an oil temperature gauge. It was a daring move for someone who knew nothing about cars. Subsequent cars were equipped with gauges including auto trans temp, intake air temp, boost pressure, oxygen sensor output and intake air restriction.

And my interest in instrumentation hasn’t been confined to those gauges normally found under the ‘automotive’ tag. Instruments from completely different fields also often have a place in car modification. The Dwyer Magnehelic gauges, for instance, are useful in assessing aerodynamics, radiator and intercooler flows, and pressure drops through intakes. (For more on using the Magnehelic gauge, do an AutoSpeed site search.) 

But the trouble with non-auto gauges is that in the past they have often been very expensive. Primarily because they’re made in small numbers, these specialist gauges from other industries have often retailed for more than they’re worth. More than they’re worth for automotive use, anyway.

But on-line auctions have changed all of that. On eBay, for example, you can find the most obscure instruments and gauges at bargain prices. They’re mostly being sold by people who don’t know what they are, what they do, or how they work. So that makes the starting price low. And if they’re really obscure, then bidding will be lukewarm too…

I’d like to give you the details but…

Posted on May 9th, 2004 in Opinion by Julian Edgar

I think that I am largely an instant gratification personality. I build it, then I like to immediately sample the results.

When I edited a print magazine, one of the excruciating aspects was waiting for the issue to come out – sometimes that would be months away. (It was even worse when I freelanced for magazines: in that case, you could wait over a year to see your work in print!) Of course, working with a web magazine like AutoSpeed has meant that if I want to see something published a week after I write it, that’s possible.

However, the major projects that I have been working on for the last year fall into the, er, distant gratification basket…

As I mentioned in my September 2003 Driving Emotion, I’ve been working on an electronics book that I am preparing with Silicon Chip, an Australian electronics magazine that we at Web Publications now also publish on-line. The book will cover a range of DIY electronic modification kits designed for performance cars. In that article I mentioned a brilliant new kit interceptor that can allow the alteration of air/fuel ratios across all loads – mentioned there was the Mark 1 version; electronics designer John Clarke and I are now up to Mark 3.

And each version just keeps getting better and better.

Testing cars

Posted on April 25th, 2004 in Opinion by Julian Edgar

One of the areas that AutoSpeed varies very substantially from other automotive media is in our new car tests. Basically, we try very, very hard to tell it clearly and bluntly like it is; something which when we do, often puts us into hot water. For example, Nathan Huppatz, our man who contacts car companies to organise the cars for tests, is currently having difficulties getting cars from Subaru, Mazda, Kia, Alfa Romeo, and Citroen. (That’s why you no longer see tests of those cars in AutoSpeed.) You see, those importers – and/or the distributors associated with those cars – didn’t like a test on one of their cars that we ran previously. So, no more cars for this non-complicit media. (Other companies place conditions on cars – Ford, for example, won’t lend me any new cars to drive – instead, Michael Knowling does those tests!)

Given that Michael and I have a completely zero bias for or against any manufacturer, it’s all pretty bizarre.

But how do we go about testing the new cars, anyway? Every new car test is a little different, but primarily we try to use each car exactly as we would a ‘normal’ car. The length of a road test is a week, so we try to use the car for that week much as we would our own. That includes going to the shops for groceries, having our partners drive the car (perhaps to work for a day), going out in the evenings, and so on. Additionally, we try to do a long country drive, make sure that the car goes through some rush-hour heavy traffic, and we push it hard on roads to test braking and handling. Additionally, if a car has a special function or aim, we try hard to exploit that as well – so a load carrier carries loads, a sports car is driven hard on winding roads, and so on.

Over the week we normally rack-up about 1000 kilometres. (Of course, no time can be set aside specifically for driving press cars – it needs to be fitted in around other work!)

Musings on new cars

Posted on April 11th, 2004 in Opinion by Julian Edgar

One of the problems with changing new car fashions is that the goal posts keep getting moved. Hey, that’s a problem? Well it is when the judgements being made within certain categories start being applied universally.

The joys of finding a single wire…

Posted on March 28th, 2004 in Opinion by Julian Edgar

Today I spent nearly six hours trying to find a wire. Odd, you say? Wasn’t there plenty of wire available at the local electronics store…cable, even? Well there was, but this particular wire was contained in the loom of a car. And the wire that I was looking for had a very specific signal on it. It was the speedo input on a mid-Eighties BMW735i.

It had all seemed easy enough…

Part of the very exciting range of DIY automotive electronics kits I am developing with www.siliconchip.com.au magazine is a speedo interceptor. It’s a small box of tricks that will let you adjust your speedo reading up or down, giving you the facility to not only correct errors but also make appropriate changes when the gearing of the car has been altered. The concept is easy – it’s just a frequency-altering device – but as always, actually developing the kit has been another ballgame altogether.

So the module that today I was trying to fit is actually the second prototype. The difficulties with the first design came about when it was realised that there’s a whole host of different design speed sensors, and if the kit was to have any pretence of being universal in application, it was going to need to be able to be configured to work with all those sensors. Not to mention, be happy working into the speedo or the ECU.

The first design came and went, then electronics designer John Clarke completed the second iteration. And it looks a beauty – you can digitally increase or reduce the speedo reading in 1 per cent increments, simply by turning two multi-position switches. So if you alter the diff ratio so it’s 10 per cent taller, you simply alter the speedo correction by the same 10 per cent.

A week of cars

Posted on March 14th, 2004 in Opinion by Julian Edgar

Our recent editorial trip to Melbourne (well, recent as I am writing this), resulted in Michael Knowling and me driving a huge variety of cars – literally, from a 512TR Ferrari to a Japanese Domestic Market grey-import Toyota Hiace Super Custom Limited. In between there was the incredible APS Stage III (Phase III? whatever…), a Lancer Evo 7 and a current model 4.6-litre factory blown V8 Mustang.

We’ll cover (or have already covered) all these cars in full AutoSpeed stories, but here are some of my thoughts…

The APS car is the most impressive straightline street performer I have ever had the pleasure of steering.

You’ll have already read about the car in AutoSpeed but I gotta reiterate that the APS Stage III Falcon XR6 Turbo is really Something Else. Here is a car that in traffic is literally as docile as any ol’ auto-trans XR6 T, but with the foot down even half-way, can obliterate pretty well every other car on the road.

Push the throttle to the floor and it’s a case of feeling yourself flung towards the horizon. Get on the gas at 100 km/h and the nose perceptibly rises, the boost builds and – whoosh! – you’re gone. From one hundred kilometres an hour to 200 kilometres an hour takes, well, about as long as to read part-way into this sentence.

Figures? We’ve already run them but to remind you, try 327kW at the back treads, a standing quarter in the mid-Elevens, and a predicted kit cost of about AUD$9000.

Shopping for rubbish

Posted on February 29th, 2004 in Opinion by Julian Edgar

One thing that I’ve always been happy to do is go through other people’s rubbish. Simply, it seems to me – and has always seemed to me – that if you can get something for nothing because it is being thrown away, and that item is of use, it’s a win for you.

So right from the time I first got mobile as a kid on a bicycle, I’ve been happy going through bins and scouring the dump. In fact, I well remember early Sunday morning jaunts through the industrial suburbs near where I lived. The trips weren’t random; nope, I’d use the Yellow Pages to find the factories likely to be throwing away the items I was after, consult the street directory to locate the premises, draw up a map, and then head out to find my treasures. And very often come home with just what I wanted.

All pretty logical for a 13 year old.

One local factory made furniture and each week in their skip were five or so 1 metre-square pieces of plywood. They all had an odd keyhole-shaped cut-out in one corner but apart from that, they were completely pristine. So every Sunday I went and collected them, bringing them home on the pushbike. Another factory made insulation, and for no apparent reason discarded batt after batt of fibreglass. Another threw away copper tube, and another often had reasonable sized sheets of glass. Since my interest at that time was solar energy, it wasn’t a great step to construct my own plate-type solar water heaters, low temperature food warmers, and so on.

Thinking back, all I had to actually pay for was a few cans of matt black spray paint and some woodscrews…

Logging temps

Posted on February 15th, 2004 in Opinion by Julian Edgar

Those of you who have read the series (starts at Using Oscilloscopes on Cars, Part 1 ) will be aware that we’ve recently been exploring the use of digital scopes with cars. As we said in those stories, if you’re doing any modification work that involves input and output signals, the only real way to see what you’re doing is with a scope. Putting my money where my mouth is, I recently bought a digital handheld scope – a Fluke 123 Scopemeter. I got it secondhand but in as-new condition – it’s a product that I have spent nearly two years trying to find at the right price…

In addition to its abilities to display waveforms, it can also be used as a paperless chart recorder. That is, it can plot by means of a line graph the level of a signal over time. Both the time and level parameters auto-scaled, so it doesn’t really matter if you’re logging something for 10 seconds – or 3 days. You can’t download the actual logged numbers from the meter but you can dump the graph itself to a PC. So the logging function of the Scopemeter isn’t as good as you’d get with an adaptor working into a PC, but because of its speed of set-up and ease of use, it’s more likely to be used in everyday measurements.

When you don’t have a workshop manual and the car’s very complex…

Posted on February 1st, 2004 in Opinion by Julian Edgar

Took on a big job the other day. Well, it was big for me. As I have discussed in another column (Driving Emotion), my partner recently bought a 1985 BMW 735i – and I was saddled with the job of fixing the things that didn’t work. Things like the electric seats (which I have covered in a dedicated story), the trip computer and the climate control.

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Road versus track testing of normal cars

Posted on January 18th, 2004 in Opinion by Julian Edgar

For years I’ve thought that magazines that test road cars on the track are deluding themselves. The conditions on a typical race track are simply so far away from real roads as to make the judgements gained on a track worse than useless. And I deliberately say ‘worse’ because in many cases I believe that the outcome of a process that involves track testing road cars – and then writing a road test on that car – can be very misleading.

A road car is a car designed for roads. You don’t test a Formula racing car by driving it to the local shops and seeing how many groceries can be fitted in, so why test the handling of a road car on a race track? Race tracks are invariably smooth, they have one-way traffic, they have run-off areas (which immediately makes a nervous car feel less twitchy!) but most importantly of all, the driver always knows exactly the radius of the next corner, the length of the straight, what the blacktop does following a crest.

Simply, on a track you’ll enjoy a car more inclined to oversteer, with much faster responses, and with quicker steering than would ever be pleasant – and safe – on a road.