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why difference in brands engine sounds?

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Old Feb 14, 2006 | 01:51 PM
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why difference in brands engine sounds?

a couple of months ago i walked by a duramx running and noticed how quiet it was, it really amazed me it being the size of the engine it is. but i guess my question is, despite how dumb it is, why the different sounds? i understand the dodges sounding different, but why would the chevy and ford be so different? and how is it quieter? by the way, i am no diesel expert at all, just got my first one and this is not intended to be a debate on which engine is better, i am happy with my ford.
 
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Old Feb 14, 2006 | 02:53 PM
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I believe pilot injection is the main reason. Isuzu got it right and Navistar programmed it out of early 6L's due to problems.

Seems I read that one of the programmers has pilot injection? Is that right?
 
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Old Feb 14, 2006 | 03:03 PM
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i heard of this injection stuff before, what is it all about and whats the difference?
 
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Old Feb 14, 2006 | 03:14 PM
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The Duramax runs Common Rail injection if I recall. Pilot injection means that the injection stage isn't one "shot" of diesel, but a couple. It doesn't create such a huge clatter.
 
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Old Feb 14, 2006 | 10:15 PM
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That is correct. Pilot or Pre injection is two shots of fuel. A small one preceding the main charge. It was found to reduce the noise, spredding out the clatter over two separate detonations. Ford had problems with it and removed it via the software. This is why the PS is louder than the Dmax. If I am correct, originally the PS was the quietest diesel, but Ford had to many problems with it. It is the wave of the future though as diesels must get quieter so more people will use them. Eventually, you will see them in cars in the US like you can already in Europe. That is the basics of it anyway, all I know about it.
 
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Old Feb 14, 2006 | 11:35 PM
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I may be wrong but didnt the alumin (spelling) heads verus cast iron of fords have a part in it also?
 
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Old Feb 15, 2006 | 01:14 AM
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Not really. They do, but few people could tell the difference.
 
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Old Feb 15, 2006 | 06:25 AM
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If this is true... couldn't, at least in theory, an aftermarket tuner make your truck quieter?
 
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Old Feb 15, 2006 | 06:57 AM
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I hope they don't get quiter...I like them loud
 
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Old Feb 15, 2006 | 08:13 AM
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I agree big dog if I wanted quiet I would have got a gasser!
 
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Old Feb 15, 2006 | 03:05 PM
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Originally Posted by stebab
If this is true... couldn't, at least in theory, an aftermarket tuner make your truck quieter?
You can get PI back with a SCT custom tune by Innovative Diesel, not sure if anyone else can but I know ID can.
 
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Old Feb 15, 2006 | 03:41 PM
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wow, interesting info, i had no idea that the comp was so involved with the diesel, i wonder why ford decided to scrap it all togeher? is it they couldn't at all get it to work or just went the cheaper route? and is there an advantage/disadvantage to either system?
 
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