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 | Home > Maintenance & Modifications > Plug n Play Chip, which one ????? |
 
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| Bodsy Site Sponsor Member Since: 03 Feb 2007 Location: Shropshire Posts: 2162  
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pretty much all the plug and play boxes do is increase the diesel pressure and the boost pressure. These are complicated engines that really you need to get a proper remap that will take into account all of the engines characteristics and not just a couple that give the quick fix boost.
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Wed Jun 24 2015 11:36am |
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| Disco_Mikey Member Since: 08 Apr 2012 Location: Dundee, Scotland Posts: 4395 
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All the boost box does is ramp up the fuel pressure, and tell the engine it's cold.
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Wed Jun 24 2015 2:31pm |
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| dangerboy Member Since: 01 Jan 2015 Location: United Kingdom Posts: 38  
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None of them. As said previously they will make the car quicker but not with any control over the proper conditions, I.e Load, injection duration, torque limiters, temperature etc. etc. You'll get more problems in the long run than a decent remap, And remember that not all remaps are equal. Stick to someone who knows what they're doing like the guys on this forum. Trust me I speak from experience 
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Wed Jun 24 2015 4:01pm |
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| Paulcp Member Since: 18 Apr 2013 Location: Suffolk Posts: 327 
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Strange, when I put 2 words into the search engine it brings up 6 pages on the subject😉 Anyhow, as others have said, my opinion is leave well alone, but have a read of the following and then decide As I mentioned earlier, these boxes gain the extra power through over fuelling the engine. It works, but at the end of the day it's your engine, and some are more sophisticated than others in what they measure and what safeguards are built in. Many claim to be digital but contain no more than a simple resister. The less sophisticated ones can also cause more "diesel knock" when the engine is cold All of the limitations are overcome by a correctly calibrated remap since this will take into account adjustments to many other engine parameters monitored by the ECU. For clarity I'm not saying "don't buy tuning boxes" but having been there its a place I'd never go again! Diesels aren't too fussy about Air/Fuel ratios, they will often continue to make power when incredibly rich, and producing huge clouds of black smoke. Big BHP figures on a diesel are easy to make, and choosing the Tuner with the highest figure can sometimes be just picking the bravest. It's easy to be brave with someone else's engine. Intercepting the Rail Pressure sensor is the key to Tuning Boxes. The ECU/engine will control the pressure, and it uses its sensor to confirm this. This figure is vital for the ECU to know the fuel quantity. Adding a resistor into this sensor circuit passes the wrong information to the ECU. What was 1500bar is now reported as 1400bar, so the ECU will activate the high pressure injection pump to raise the pressure by 100bar above the sensor value. The extra pressure will force more diesel through the open injector, and as mentioned, for a diesel, more fuel = more power. There is safety factors and tolerances built in, but in all cases, the Injector pump is now doing more work providing the extra pressure, and the Injectors are now holding back greater forces. The Torque and Smoke limiters have been bypassed as the ECU doesn't realise the greater fuel flow, and more interestingly, the MPG is screwed! Economy and Tuning Boxes From the original calculations in the ECU, and the Vehicle Road Speed, the ECU will be able to calculate the quantity of fuel used per unit of distance traveled. But what happens if the quantity of diesel injected is higher than the value the ECU is expecting? In this case, the economy will be overestimated as the ECU thinks it is using less diesel than reality. As with most external changes, if one calibrated component is disturbed, the knock on effects will be far reaching. That's not to say that there isn't an increase in economy, there will be changes, and often the economy does increase, but certainly not to the level that the On Board Computer or Trip Computer thinks. |
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Wed Jun 24 2015 8:40pm |
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| DazC Member Since: 23 Jun 2015 Location: Monifieth Posts: 2  
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Thanks guys for the reply's, very helpful and Disco_Mickey I will call you when I get back. |
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Mon Jun 29 2015 11:28am |
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