7.3 turbo whistle question - Ford Powerstroke Diesel Forum
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Old 08-10-2009, 06:09 PM
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7.3 turbo whistle question

ok I have a 2000 7.3 dually now as pf last week it has a 4" magnaflow exhaust I also did the foil delete the intake is the ais intake and was on the truck when I got it. I have read alot of the posts on here about the 7.3 and making the turbo louder. I have ran across 2 older gentlemen one with a 2000 dually and one with a 2003 dually both said they had 4" exhaust and both said they had a chip on the trucks and both were 7.3's the trucks looked mostly stock other than that I didn't get to open the hoods on them but they had no reason to lie both trucks were used for pulling campers. But anyway when they crank these trucks up and I was a good ways from the one they both whistled loudly setting there idling and just got louder when they pushed the throttle and this was with no load on them. Mine you can't hear it at all untill I get it up in the rpm's going down the road I was wanting to know what they did? I am waiting to chip my truck I was going to order it this past week but my gauges came in and ups damaged one of them so I wanted them in and working before my chip comes.
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Old 08-11-2009, 08:04 AM
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They probably don't have a muffler. That makes a big difference in exhaust sound.
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Old 08-11-2009, 11:11 AM
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That, or they have a wicked wheel, and/or turbo housing
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Old 08-11-2009, 11:21 AM
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all boils down to what kind of exhaust , ive never thought a 7.3 had alot of whistle per say anyway
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Old 08-11-2009, 11:23 AM
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Yep... just at idle you can hardly tell a difference between the WW, GTP38R, or a GT42 but you can tell a difference if the muffler is missing...
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Old 08-11-2009, 03:20 PM
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I may buy a straight pipe and try it not sure I would like to find those guys and look at the trucks Theres idling was louder than mine at full throttle under a load. It just baffled me. Thanks guys. I didn't think a WW made any differance in sound just the surging problem when towing.

To give you an example the trucks had a louder whistle than my mustang with a vortech supercharger on it and it has a loud whistle when idling.
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Old 08-11-2009, 03:42 PM
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Just keep your muffler... just incase you get tired of the noise.. LOL

The WW does make a louder whistle while you are driving around... but not much if any difference at idle.
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Old 08-11-2009, 04:08 PM
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are you sure that the 2003 is a 7.3 because the 03 6.0l turbos are really loud at idle and when u start and when u start rolling
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Old 08-11-2009, 06:49 PM
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No it was a 7.3l I stopped the guy and asked him he was just leaving when I did so I couldn't really at the truck he said he wouldn't have a 6.0 LOL. He told me he had a 4" exhaust and an edge programmer he didn't even have gauges in the truck.
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Old 08-12-2009, 03:21 AM
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Open air filter will add a little bit more whistle
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