Sound of the Scorpion - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 6 (permalink) Old 09-23-2009, 06:56 PM Thread Starter
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Sound of the Scorpion

Different to what I am used to hear from a V8-diesel I must say


Note that the engine is even not under a hood....
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post #2 of 6 (permalink) Old 09-23-2009, 10:07 PM
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what makes the sound change like that.

mine: 1986 F250 6.9 idi

dads: 2001 F250 platinum edition 7.3 powerstroke

also 1966 MACK B53.in the process of restoring.

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post #3 of 6 (permalink) Old 09-23-2009, 10:15 PM
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Quote:
Originally Posted by southtexasidi View Post
what makes the sound change like that.
The addition of the pilot injection

2000 F350 Ex cab Long Bed 7.3 Powerstroke

Late 99 F250 Reg cab long bed 7.3 Powerstroke


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post #4 of 6 (permalink) Old 09-24-2009, 12:46 AM
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I like the "old' diesel sound.
Hey Matt, we need a switch to turn off the pilot mode.

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post #5 of 6 (permalink) Old 09-24-2009, 09:20 PM
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ok.I know this is a dumb question. but what is pilot mode?

mine: 1986 F250 6.9 idi

dads: 2001 F250 platinum edition 7.3 powerstroke

also 1966 MACK B53.in the process of restoring.

american club # 31

singles club # 218

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post #6 of 6 (permalink) Old 09-24-2009, 09:27 PM
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Quote:
Originally Posted by southtexasidi View Post
ok.I know this is a dumb question. but what is pilot mode?
refers to pilot injection.

Sometimes called "pre-ignition," pilot injection eliminates the combustion spikes that cause the "rattle" traditionally associated with diesel engines, especially at idling speeds. Pilot injection introduces a small quantity of fuel into the combustion chamber prior to the main power-inducing explosion. This injection takes place within a few ten-thousandths of a second of the main explosion and results in a smoother combustion cycle and reduced clatter. Even at a standstill, an Audi, BMW or Mercedes-Benz diesel is now all but as refined as its gasoline sibling.

Garrett






BRING BACK THE OLD TDG!
oh well, i have a map to the darkside

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