Will an exhaust actually help with mpg - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 17 (permalink) Old 10-11-2007, 01:55 PM Thread Starter
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Will an exhaust actually help with mpg

After 6 years of the stock exhaust and almost 1 year chipped, I am getting ready to go for an exhaust. Will I see any mpg benefit? I just go back from a trip where I ran 17.5 mpg at 70 mph with my 33 x 12.5 inch tires and 19.3 at 65mph. With the stock tires I usually get 18.5 at 70mph. Thanks

2002 f-350 PSD, 4x4, cc short bed, 6spd, ccv mod, airdog, AIS filter, isspro ev and scangauges, detroit TT, ITP boost annihalator, ITP RR, bellowed up-pipes, ats housing, turbomaster, 3.5 dp magnaflow, very happy with ultra smooth and linear PHP 50t, 80DD and "whisper" tunes.
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post #2 of 17 (permalink) Old 10-11-2007, 08:23 PM
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Re: Will an exhaust actually help with mpg

I dont know how much it will help but I belive it would. I have a similar setup but have had a 4in since I bought the truck. I get similar milage with a auto and 33 12.50 mt's. so with that six speed I would think you would get a littel better. nothing great but at least 1 or 2 mpg on average

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post #3 of 17 (permalink) Old 10-12-2007, 12:24 AM
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Re: Will an exhaust actually help with mpg

I put a 4" DPPI exhaust on mine some time back. Made the truck sound nicer and run a bit cooler but I never noticed any improvement in MPG due to the exhaust.

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post #4 of 17 (permalink) Old 10-12-2007, 12:29 AM
 
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Re: Will an exhaust actually help with mpg

I would think with your set up your mpg would improve with a larger exhaust. Those tunes are great with a little more air flow.
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post #5 of 17 (permalink) Old 10-12-2007, 03:15 AM
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Re: Will an exhaust actually help with mpg

Run a hood stack.

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post #6 of 17 (permalink) Old 10-12-2007, 04:22 AM
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Re: Will an exhaust actually help with mpg

I don't really think it will help with your mileage but it should free up a fer HP and lower the EGT's.

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post #7 of 17 (permalink) Old 10-12-2007, 08:11 AM
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Re: Will an exhaust actually help with mpg

Quote:
Originally Posted by THEDIESELMAN View Post
I don't really think it will help with your mileage but it should free up a fer HP and lower the EGT's.
i agree

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post #8 of 17 (permalink) Old 10-12-2007, 12:21 PM
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Re: Will an exhaust actually help with mpg

It would sound a-lot better though!

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post #9 of 17 (permalink) Old 10-12-2007, 03:01 PM
 
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Re: Will an exhaust actually help with mpg

Only speaking from my own experience. When I had just intake and exhaust With Jody's tunes I was getting a little over 18 mpg. Now I am getting around 14. Before the intake, exhaust and chip I was getting 16 dry and 13 with a load.
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post #10 of 17 (permalink) Old 10-12-2007, 06:08 PM Thread Starter
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Re: Will an exhaust actually help with mpg

Any idea what caused your mileage to decrease from 18 to 14? Did you add the chip, exhaust and intake all at once? I would like to know if you were able to isolate out an exhaust difference.

2002 f-350 PSD, 4x4, cc short bed, 6spd, ccv mod, airdog, AIS filter, isspro ev and scangauges, detroit TT, ITP boost annihalator, ITP RR, bellowed up-pipes, ats housing, turbomaster, 3.5 dp magnaflow, very happy with ultra smooth and linear PHP 50t, 80DD and "whisper" tunes.
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