Join Date: Aug 2005
Location: North Central NJ
Thanked 151 Times in 105 Posts
Based on your signature, I assume you own the 2003, and you are comparing it to someone else's 2005. There are a lot of things that will make them sound different. Would help if you told us the mods to both trucks. For starters, your 2003 has a 10-vane turbo, whereas the 2005 has more vanes (not sure if it is the 13 or 15-vane variety). More vanes means LESS "F-16" type sound. There are many who have swapped their 05' and later 6.0 turbos to get an 03' version with less vanes. Just for the sound!
Anyway, the turbos make a big difference in sound. Now, another factor is the exhaust. If you 03' has no aftermarket exhaust and the 05' does (or vice versa) there will be a huge difference in how they sound.
Please tell us the mods/set up and we will be able to tell you what you are hearing.
Regarding it taking time for your 03' to behave normally, that probably means your turbo is sticking. Could be other things, like a fouled up EGR valve, etc. If you are handly, rebuild and clean the turbo and see if that fixes it. I'd also clean the EGR valve. If you're not handy, bring it to a diesel tech to get that work done. I assume it is no longer under warranty.
Black 2003 F350 Dually, Nothing Stock
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