This is not a rant or complaint, just and observation:
Dropped off the Excursion for driveshaft replacement this morning. Left her idling in the service drive. Along pulls up an F350 w/7.3 man those are way quieter than these 6.0’s after the flash. Then another F250 comes up behind me w/7.3, again I’d say half or more of the db noise. Next another F350 dually with the 6.0 still with his pilot injection on. All four were idling two by two and you could pick mine out with ease and it was the farthest away from where we were standing. We all got to talking a little the two 7.3 guys commented that they thought the new diesels were supposed to be quieter ( talking to me) I just shook my head and said, it were…. . Just thought I’d share that little story. It was interesting having four Ford diesels there idling and actually hearing the differences. I’d be nice to get pilot back some day. Oh well back to work.
i have noticed the exact same thing.... although, alot of 6 ohh owners here REFUSE to deal with the truth, the non p.i. 6.0 is LOUDER than the ole 7.3's, alot louder.
where i work, i am out front of the building alot helping customers, i can tell when a 6 drives by, or stops at the light witout ever looking, it is kinda like a 5.0 stang, i can tell those as well
And we have guys all over taking off the mufflers and cats to make them louder. What's up with that???
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2005 F250 Supercrew Lariat, 2003 F250 4x4 Supercrew Lariat. 1999 F150 hunting truck(ragged out but pulls like a tractor). 2005 C6 "arrest me red" vette convertible (to save fuel )
Non p.i. 6.0l and I absolutely love the sound of it, to me it sounds like a truck. Never had p.i. and never drove one with it, so I can't really compare, but I am just very pleased with the sound of the non p.i. 6.0l.
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F-250 CC Fx4 Lariat PSD 6-Speed with moonroof, camper package and AIC. Medium Wedgewood Blue over Arizona Beige. Retrax bed cover. Cabelas Trail Gear floor mats. Edge Juice Platinum with Attitude. Airaid Intake. MBRP exhaust.
Come to think of it I too would of been stoked being in a garage bay with 4 diesels running. Did you all let out a grunt like Tim the Toolman Taylor?
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F-250 CC Fx4 Lariat PSD 6-Speed with moonroof, camper package and AIC. Medium Wedgewood Blue over Arizona Beige. Retrax bed cover. Cabelas Trail Gear floor mats. Edge Juice Platinum with Attitude. Airaid Intake. MBRP exhaust.
I just traded the 7.3 for a new 6.0. one of the reasons i got away with it (with the wife) was how much quieter it is. This may just be in the cab (better insullation?), but it works for me. Don't understand the PI thing but would like to know.
just before the main burst of fuel is injected into the cylinder, a small amount of fuel is injected first. the noise you hear a diesel make is the combustion process. PI quiets it down. hope that helps.
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04 F-350 PSD, Super Cab, Short Box. 9' 2" Boss V-blade. 72 Bronco getting rebuilt.
In laymans terms "pilot injection" is a preliminary shot of fuel into the combustion chamber approxamately 5 degrees before TDC. This preliminary injection shot preheats the cumbustion chamber to improve combustion and removes the low rpm knock associated with a diesel. Bosch common rail systems such as the system installed on the Duramax neutralize pilot injection at 2500 rpm where the preheat of the cylinder is not necessary. Pilot injection is less than a 5% of the main injection shot but at the same pressure. Roughly between 22 and 27,000 PSI at the injector.
None of the 6.0s have pilot injection any more. Only the early 03s that have not been flashed.
Pilot injection is controlled by the PCM and FICM. PI injects a small amount of fuel to start the ignition, pauses, then injects more fuel for the power. Hence the name Pilot injection. I makes for a quieter diesel. There is a mechanical injector that does the same thing but is called split shot injection. PI only worked during idle speeds for a quieter idle. Ford disabled the PI due to associated problems. PI was removed from all the programming.
Ford used some EGR techniques to help quiet the idle. Tim Lamkin did some db readings that did not bear out the idea that the 6.0 was noisier with the PI removed than the 7.3's and some of the other diesels.
This was sent to me by a very good friend, I submit it for a great laugh................as to the lack of quietness (haha) about the 6.0. Now these are real numbers so read and heed.
It seems our 6.0 really is quiet
My son and I test drove three new diesels tonight and took all the readings with the same calibrated sound meter (slow setting). All readings were taken with A/C and stereo off, no conversation. Outside readings were taken 10' directly in front of truck and 25' away at a 45 degree angle, about where my neighbor's bedroom window is. Readings on my 2001 F-250 Crew Cab V-10 gasser were included for comparison. All vehicles were crew cab, and built within the last six weeks. From what I can tell, the F-250 still had split shot injection, raising idle 100 RPM or more and there was a noticable change in the tone of the enging noise. The temp was 59 deg, humidity 60%, if that matters.
Ford F-250 6.0L PowerStroke Diesel (no hood insulation)
Inside @ idle 52 db
Inside @ 70 MPH 68 db
Outside 25' @ 45 deg 62 db
Outside 10' @ 0 deg. 72 db
Chevrolet Sierra 2500HD 6.6L Duramax Diesel(hood insulation)
Inside @ idle 54 db
Inside @ 70 MPH 68 db
Outside 25' @ 45 deg 65 db
Outside 10' @ 0 deg. 71 db
Dodge Ram 2500 5.9L Cummins HO Diesel (no hood insulation)
Inside @ idle 58 db
Inside @ 70 MPH 70 db
Outside 25' @ 45 deg 66 db
Outside 10' @ 0 deg. 69 db
Ford F-250 6.8L Triton V-10 (2001, mine)
Inside @ idle 45 db
Inside @ 70 MPH 68 db
Outside 25' @ 45 deg 58 db
Outside 10' @ 0 deg. 63 db
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None of the 6.0s have pilot injection any more. Only the early 03s that have not been flashed.
Pilot injection is controlled by the PCM and FICM. PI injects a small amount of fuel to start the ignition, pauses, then injects more fuel for the power. Hence the name Pilot injection. I makes for a quieter diesel. There is a mechanical injector that does the same thing but is called split shot injection. PI only worked during idle speeds for a quieter idle. Ford disabled the PI due to associated problems. PI was removed from all the programming.
Ford used some EGR techniques to help quiet the idle. Tim Lamkin did some db readings that did not bear out the idea that the 6.0 was noisier with the PI removed than the 7.3's and some of the other diesels.
i still dont get this..how do you know new ones do not have this? it has never been confirmed, by ford or ANY tech. why are new 6.0 still quiet when you get them, but then after the flash they get louder?
some say it's b/c of the egr valve that makes it quiet on the newer ones...funny how if this is true, ford chooses to turn this off TOO to make it work right.
A story of noisey diesels
. Just thought I’d share that little story. It was interesting having four Ford diesels there idling and actually hearing the differences. I’d be nice to get pilot back some day. Oh well back to work.
