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post #1 of 6 Old 05-06-2012, 03:32 PM Thread Starter
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New 6.4 owner

Hi all i am a new owner of a 2008 F-350 crew cab long box 4x4 Lariat love the truck have ordered a Mini max dpf and cat delete am a farmer no e test for me and banks ram air and going to do a EGR delete also. Have a couple of questions nothing has been put on this truck but the ram air when i am driving it accelerating not hard it hisses very loud is that normal and did before the ram air
is there anything else anyone would suggest for this truck I pull draft horses with it.

thanks Jim
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post #2 of 6 Old 05-06-2012, 07:01 PM
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The sound is perfectly normal. Do a search for hairdryer sound and you'll get a number of posts describing it.

A 5in exhaust system will deepen the sound a bit, but not get rid of it completely. You can try adding a muffler our a resonator to help with the sound.

Sent from my EVO using AutoGuide app.

Shaun

'08 F250 6.4L Lariat 4x4 CC/SRW fully loaded, special ordered
6" Fabtech 2.25 dual shock lift w/18" AR wheels, 35" Toyo AT's
Avic-Z2 Nav/Stereo w/iPod, Bluetooth, XM NavTraffic
(2) Rear headrest mnt DVD entertainment systems
Line-X bedliner
Banks CAI, Dual Exhaust, Six-Gun, Speed Brake & iQ (test vehicle)
Bushwacker Fender Flares
Ravelco Anti Theft Device

Quote:
Originally Posted by Rick Santorum
We went into a recession in 2008 because of gasoline prices.
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post #3 of 6 Old 05-06-2012, 07:40 PM
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a packed muffler/resonator is the only thing that's really going to knock it down

I think it sounds cool
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post #4 of 6 Old 05-07-2012, 03:04 AM Thread Starter
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but this sound seems to be coming from the engine compartment and it is as soon as it goes above 10 psi on the boost basically when the turbos start to spool the hiss starts

thanks for your info
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post #5 of 6 Old 05-07-2012, 04:23 AM
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Larry
2015 F-350 CCLB DRW, Lariat Ultimate,
2nd Gen. 6.7L "Scorpion" Turbo Diesel,
440HP/860TQ, Torque Shift 6-speed,
Tuxedo Black W/Charcoal Black Int.,
14,000 LB GVWR,
3:73 Gears W/Limited Slip,
17" Polished Forge Alum. Wheels,
BFG All-Terrain Tires,
Factory 5th Wheel/Gooseneck Prep Pkg.,
Spray In Bed-Liner,
Supplemental Cab Heater,
Camper Pkg.,
Chrome Pkg.,
FX4-Off Road Pkg.,
Upfitter Switches,
Engine Block Heater,
9025 Lbs. on the CAT Scales.

"Mack Daddy Scorpion!"
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post #6 of 6 Old 05-07-2012, 06:04 AM
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Quote:
Originally Posted by ossjughead View Post
but this sound seems to be coming from the engine compartment and it is as soon as it goes above 10 psi on the boost basically when the turbos start to spool the hiss starts

thanks for your info
Yep, that's the turbo making the noise. The DPF/CAT would create excessive back pressure thus muting the sound of the turbos. With a free flowing exhaust, you hear the turbos more and the hairdryer sound out the back.

Shaun

'08 F250 6.4L Lariat 4x4 CC/SRW fully loaded, special ordered
6" Fabtech 2.25 dual shock lift w/18" AR wheels, 35" Toyo AT's
Avic-Z2 Nav/Stereo w/iPod, Bluetooth, XM NavTraffic
(2) Rear headrest mnt DVD entertainment systems
Line-X bedliner
Banks CAI, Dual Exhaust, Six-Gun, Speed Brake & iQ (test vehicle)
Bushwacker Fender Flares
Ravelco Anti Theft Device

Quote:
Originally Posted by Rick Santorum
We went into a recession in 2008 because of gasoline prices.
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