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Old 11-30-2010, 06:15 AM
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h&s and exhaust?

im looking to put a h&s tuner in my 08. my understanding is that no modifications need to be done to the factory exhaust for it to run properly, as it can "turn off" the sensors in the factory exhaust. my concern though is the factory exhaust to restrictive to run a 250hp file? will temps get out of control? i dont have any desire to squeeze every last horsepower out of the motor, make it loud or spend a bunch of money on a full turbo back exhaust. what are my options here? is an intake going to be required also? i read of filter minders in the factory housing coming apart under boost. thanks.
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Old 11-30-2010, 08:32 AM
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I did a H&S Mini and a Flo Pro downpipe back system.

Loud.... No

More rumble.... Yes

Lower EGTs.... Hell yes

Running the mild tune on an F450 with 4.30 gears driving the speed limit getting 17.5mpg vs the before of 12-13mpg.

Cost 1400 bucks.

Net difference 612miles to 35 gallons vs 437 miles to 35 gallons, and no more washing the cylinders with raw fuel on the exahust stroke. Driveability is way up as well.

Down side if you have to have the DOC/DPF for state inspection.... need to save em and reinstall once a year.
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Old 11-30-2010, 01:48 PM
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Quote:
Originally Posted by mikeym View Post
im looking to put a h&s tuner in my 08. my understanding is that no modifications need to be done to the factory exhaust for it to run properly, as it can "turn off" the sensors in the factory exhaust. my concern though is the factory exhaust to restrictive to run a 250hp file? will temps get out of control? i dont have any desire to squeeze every last horsepower out of the motor, make it loud or spend a bunch of money on a full turbo back exhaust. what are my options here? is an intake going to be required also? i read of filter minders in the factory housing coming apart under boost. thanks.
Yes, the H&S unit will keep the sensors happy, but you will need to remove the DPF in order to run the race files. You can run the regular files with the stock exhaust, but you are going to be limited to 120 HP. If you want to run the race files, I highly suggest getting a DPF/Cat delete setup at the very least. A full down pipe back exhaust isnt absolutely necessary, but it will do a better job of lowering EGTs. As far as an intake goes, I always recommend them with a delete kit. You can get by without one, but they definitely help with throttle response as well as overall efficiency. If you have any questions, feel free to give me a holler.
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Old 11-30-2010, 05:09 PM
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Quote:
Originally Posted by MD05 View Post
I did a H&S Mini and a Flo Pro downpipe back system.

Loud.... No

More rumble.... Yes

Lower EGTs.... Hell yes

Running the mild tune on an F450 with 4.30 gears driving the speed limit getting 17.5mpg vs the before of 12-13mpg.

Cost 1400 bucks.

Net difference 612miles to 35 gallons vs 437 miles to 35 gallons, and no more washing the cylinders with raw fuel on the exahust stroke. Driveability is way up as well.

Down side if you have to have the DOC/DPF for state inspection.... need to save em and reinstall once a year.

True but the other option for cheap and still quiet is to gut the internals of the DPF&CAT on the stock system, then unplug the sensors and run the DPF free race file.
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Old 11-30-2010, 07:54 PM
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Originally Posted by KB3MMX View Post
True but the other option for cheap and still quiet is to gut the internals of the DPF&CAT on the stock system, then unplug the sensors and run the DPF free race file.
I would not recommend doing this. While it can be done, if you ever need a DPF, you are looking big out of pocket money to get one. If you ever have a reason to return it back to stock, you will always be in Regen mode.

Just by a down pipe back exhaust. You can get one in the $400 range, and Nate can hook you up.
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