Category Archives: Electrics

Driverless Cars – People are literally 10 million times safer than a computer

The safety of driverless cars versus cars driven by

google_driverless_car

In 2015 the reliability of software and computers is nowhere near what is required for there to be a safe driverless car. For them to be considered at this time is stupid at best.

people in the UK. In short, only an idiot or a psychopath would consider driverless cars a good idea and here are the facts that show why.

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Primera MAF Problems – The Saga Continues

If you have read my past posts about the MAF sensor problems on the Primera you know it has been an ongoing problem.

I thought I had the issue licked but a few months ago the problem re-emerged, ie on off power delivery and stalling.

To cut a long story short it seems that problem was down to Continue reading

Car Alternator Information from Wikipedia

Alternators are used in modern automobiles to charge the battery and to power the electrical system when its engine is running. Until the 1970s, automobiles used DC dynamo generators with commutators. With the availability of affordable silicon diode rectifiers, alternators were used instead. Alternators have several advantages over direct-current generators. Continue reading

Car Battery Information from Wikipedia

An automotive battery is a type of rechargeable battery that supplies electric energy to an automobile. Usually this refers to an SLI battery (starting, lighting, ignition) to power the starter motor, the lights, and the ignition system of a vehicle’s engine.

Typical Car Battery

Automotive SLI batteries are usually lead-acid type, and are made of six galvanic cells in series to give a 12 volt system. Each cell provides 2.1 volts for a total of 12.6 volt at full charge. Heavy vehicles such as highway trucks or tractors, often equipped with diesel engines, may have two batteries in series for a 24 volt system, or may have parallel strings of batteries. Continue reading

Primera GT/Infinit G20 Test Feb 2012 – Stalling, Hesitation, AEM FIC

So I have covered this issue a few times.

The car is running an SR20VE and there is a AEM FIC8 controlling the fuelling and timing. Continue reading

AEM Coil On Plug Conversion Kit – Honda B-Series

AEM now offer a cost efficient way of upgrading the ignition system on Honda B-Series engines.

The original Honda B-Series ignition system can lose accuracy at high rpm, especially if the engine has been modified and is running a higher rev limit.

The loss of accuracy can be unpredictable meaning high revving B-Series engines may not be getting all the power possible, reliably. The AEM coil on plug conversion kit cures this problem.

Modotek – Manufacturer Performance Electronics, Boost Controller

Modotek was brought to our attention by Modified Magazine.

Modotek have just released their T7 boost controller which looks to finally offer something close to the features of the until now dominant Apexi AVC-R Continue reading

Primera P11 GT Long Term Test – October 2011

I have been runing the car with 15inch Rota Slipstreams for the past 2 years. The wheels were fitted with Toyo R888 205/50-15 which have a smaller rolling raidus than the standard 195/60-15 by some 3.75%.

This reduction made the car noticably faster and more responsive. In 5th gear the car had noticeable acceleration.

The grip from the R888s was fantastic and they were good in the wet but not so good in standing water.

The reason I bring it up is I have decided to go back to the standard wheels for the winter. The difference in stability is notiecable.

The side walls on the R888s were much stiffer than normal road tyres. Ride is much more floaty with the OE tyres so when the weather picks up again we will be going back to a track biased tyre. They are well worth any downsides.

A few months ago I cleaned the MAF sensor and all was well after. Unfortunately the rough running has come back in the last week. I will have to check the voltages from the MAF sensor to see if that is the problem or not but it feels like it could be. Either that of the fuel pressure regulator.

If it turns out to be the MAF I will be looking for a cheap larger bore alternative. The Hitachi MAF fitted to the GT from the factory is extremely expensive to replace which is the reason I will be gong for something different.

Other things this month, after 200,000 miles we have the first squeaks coming form the dashboard, so I suppose I cannot complain too much!

The poluyurethane engine mounts I have had fitted to the car for the last year still perform well. But I still think they are probably too stiff for a dialy  driver, like I said at the time one bush would have been enough.

I advanced the base timing on the car a few months ago and retarded the ignitoin via the AEM FIC to compensate but retarding the igntion with FIC seemed to knock the starting igntion timing.

By retarding the ignition on the AEM FIC by 10 degrees to counter the difference of advancing of the distibutor by 10 degrees I thought the starting igntion timing would be the same as before but that does not seem to be the case.

It is possible that the starting ignition timing is fixed in some way and is not adjustable or that advacing the timing by clocking the distributor does not have any effect.

To be honest I am a bit confused about the situation. When the ECU is put into static timing mode you can see that change the distributor did but the starting igntion timing does not seem to have been changed.

If you know whether the SR20DE FWD has a seperate map for starting please let me know, if it does it would explain why the staring ignition timing does not seem to have been changed even though the base timing has been.

Next month hoepfully some progress will be made on the MAF issue and hopefully I will have got to the bottom of the starting igniton timing.

AEM FIC Review

This review highlights things to watch out for when using an AEM FIC as well as general plus and negative points of the unit. The review is specifically for the FIC8 but the FIC6 should be similar. I am not going to cover what is already included in the documentation that comes with the FIC. Here is a link to the AEM paperwork. Continue reading

Electrical Systems

StrikeEngine – Links to manufacturers of automotive electrical systems and components such as connectors, cables and alternators.

Automotive Electrical Systems and Electrical Components

Alternators & Starters

UK

Brise

USA

Tilton Engineering

Cables

Century Cables
Performance Wiring Solutions

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Data Logging

Data Logger & Sensor Manufacturers & Suppliers

Data Logger & Sensor Manufacturers & Suppliers to top level motorsport from the UK and USA.

A data logger (or datalogger) is an electronic device that records data over time or in relation to location either with a built in instrument or sensor or via external instruments and sensors. Increasingly, but not entirely, they are based on a digital processor (or computer). They generally are small, battery powered and portable.

Dataloggers vary between general purpose types for a range of measurement applications to very specific devices for measuring in one environment only. It is common for general purpose types to be programmable however many remain as static machines with only a limited number of changeable parameters. Electronic dataloggers have replaced chart recorders in many applications. more from Wikipedia

see also:
Gauge Manufacturers
Clutch Kit & Flywheel Manufacturers
Motorsport Metal Suppliers Continue reading

MAF Sensor Cleaning

If your car is running badly or it is just not as smooth as it used to be your MAF sensor could well be the cause.

How does a MAF Sensor work?

A brief background on what a MAF does. A MAF sensor measures the volume of air entering an engine. By passing a current through a wire and measuring the change of resistance of the wire the ECU can measure how much air is entering the engine at a given time.

MAF Sensors are usually easy to locate and if they have done a lot of miles they could well benefit from being cleaned

Very simple, no moving parts and very reliable

Symptoms of MAF sensor problems and faults.

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