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Old 01-14-2014, 12:02 PM
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jet engine!

So we have a customer that came into the shop a few weeks ago, and his truck (00 f350 with the 7.3l) sounds like a jet while warming up after starting. It was the greatest sound ever!
My question is what is needed to get that sound. I have a 99 f350 7.3l with a AFE intake, WW2, 4" magna flow down pipe into a 5" straight pipe exhaust and up into dual 8" stacks, and a TS-6Position Chip. I really would love to get that sound as its badass. I can get it when my truck is in the 100hp and 140hp setting only
Thanks!
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Old 01-14-2014, 12:08 PM
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Sounds like his Exhaust Back Pressure Valve is closed.
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Old 01-14-2014, 12:12 PM
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Haha so its not a good thing then is what that means
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Old 01-14-2014, 01:37 PM
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Because the engine doesn't warm-up easily, the EPBV is designed to cause a restriction making the engine "work harder" and produce Heat earlier. It's actually supposed to do that when it's cold.

I don't know why people object to that noise, I like it too!
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Old 01-14-2014, 01:52 PM
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Its a sound that just makes me smile ear to ear ha.
My truck likes to 'wet stack' when its cold out. Is there any way around that, my neighbors arent too fond of the noise it makes at 8am 6 days a week lol. Also my heater only works on defrost, I've read around the forum and seen how to check it outside under the hood and checking the vacuum lines but still am lost on it :/
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Old 01-14-2014, 01:59 PM
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yep what csipsd said
it just means the truck is cold trying to warm itself up.
there is a butterfly valve on the exhaust housing of the turbo.
it closes to create load to warm the engine up.
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Old 01-14-2014, 02:03 PM
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What else can i do to get more turbo sound. I read online some guys pull the heat shielding off the up-pipes and bellow-pipes and the hood liner as simple solutions. I've looked into changing out my piping and doing a techicooler from banks
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Old 01-14-2014, 02:36 PM
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As others have stated, it's the EBPV and it is completely normal when cold if the EBPV system is operating correctly. Most get rid of it because of it's potential issues (mainly oil leaks and sticking). I enjoyed the sound of it too when I had mine functioning. However, at 6AM my neighbors did not
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Old 01-14-2014, 02:45 PM
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Quote:
Originally Posted by StrokinAlaska View Post
What else can i do to get more turbo sound. I read online some guys pull the heat shielding off the up-pipes and bellow-pipes and the hood liner as simple solutions. I've looked into changing out my piping and doing a techicooler from banks
You can remove the insulation from the hot side of the IC...

A Banks IC will not do anything sound wise...

I cant understand why people want to listen to that crap for hours on end, must be just old...

Here is my truck with no hood insulation, no firewall insulation...



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Old 01-14-2014, 04:38 PM
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Damn Joe your truck sounds good. Mine does this weird thing where it sounds like it's opening and closing very rapidly, making a loping sound. It's annoying as hell.
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