Crappiest tuning box?

[AlexD333]

Just saw this and made me chuckle :lol

http://www.ebay.co.uk/itm/Tuning-NISSAN-Terrano-Qashqai-Primastar-Pathfinder-GTS-Patrol-Serena-SLX-Qashqai-/141373745478?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item20ea882946

[Sweety]

Wow I better buy 10 of them then i'll have a sports car:lol:lol:lol you would be far better off beefing up the ground cable to the body, chassis & engine as they are silly thin on the T2 & if you want to do the whole hog you replace the positive lead from the alternator to the battery with 2-0 gauge wire won't make your motor any faster but the electrics will get all the current they need & it's a job i'll be doing

[rustic]

The theory behind this, is there is electrical noise in the 12 volt system, caused by the alternator, ECU taking current several thousand cycles per second etc.

So you need some thing to stabilise the voltage and get rid of this noise and smooth it out.

The battery is not the best place for it, as you have resistance in the cabling to the battery.

This device is probably nothing more than a large capacitor, 68,000 uf or more.
In fact to meet their claim "it is not a capacitor," then it probably comprises several...:augie These will then filter out a wider bandwidth of frequencies.

The problem with electrolytic capacitors is that in time they dry out, and can short out, now do you want a short circuit across the battery... without a fuse?

The greatest effect with the kit, is using the sand paper to clean up the terminals, this probably has the greatest improvement alone.:thumb2

As in the previous thread, improving the cable sizes and reducing the resistance at connections will help to smooth out these voltage fluctuations. :thumb2

[AlexD333]

The theory behind this, is there is electrical noise in the 12 volt system, caused by the alternator, ECU taking current several thousand cycles per second etc.

So you need some thing to stabilise the voltage and get rid of this noise and smooth it out.

The battery is not the best place for it, as you have resistance in the cabling to the battery.

This device is probably nothing more than a large capacitor, 68,000 uf or more.
In fact to meet their claim "it is not a capacitor," then it probably comprises several...:augie These will then filter out a wider bandwidth of frequencies.

The problem with electrolytic capacitors is that in time they dry out, and can short out, now do you want a short circuit across the battery... without a fuse?

The greatest effect with the kit, is using the sand paper to clean up the terminals, this probably has the greatest improvement alone.:thumb2

As in the previous thread, improving the cable sizes and reducing the resistance at connections will help to smooth out these voltage fluctuations. :thumb2

Where did you get all that info from Rustic? Very informative! :clap

I didn't actually want one myself just thought its gotta be bad for 20 quids.

I do however fancy the beefing up the battery cables :thumb2

[rustic]

Where did you get all that info from Rustic? Very informative! :clap...

It's my background... Electronic Engineering was my first career.:thumb2
I designed electronic instrumentation, I did a lot of work in interference, CE approval of electronic instrumentation.
I also ran an EMC test chamber, which was a screened room, no RF could get in or out.
It was used for transmitting RFI at equipment, and measuring interference from them, so they wouldn't interfere with other equipment and modifying them so they were not affected and also zapping with high voltage up to 16kV and spikes on the electrical supply.
We also had equipment that plotted the interference, frequency and field strength.
I found the most interesting part was designing a cheap solution that solved the problem. :thumb2

Rustic