Worse MPG with air intake??? - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 14 Old 01-12-2013, 07:24 PM Thread Starter
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Worse MPG with air intake???

Did anyone else notice a decrease in MPG after installing a air intake? I installed a S&B awhile back and noticed a decrease in MPG. I was looking back today at my records and there was a 2-3 MPG decrease since installing the air intake. I am going to reinstall my factory air filter and see if it increases. Did anybody else notice a decrease in fuel mileage after installing air intake????

Will

2004 F-350 Lariat Crew Cab FX4, Dark Grey, T3 Front and Rear replacement bumpers, Fumoto valve, Diamond plate running boards, Zoodad mod, Dieselsite coolant filter w/ ELC, Blue Spring Mod, LED cab lights, Edge Insight CS, SCT SF3, PHP FICM/ECM rollback, Sinister EGR Delete, 6.4 Banjo Bolts, ARP head Studs, Zone Offroad Leveling Kit, CCV Mod, Straight Exhaust, S&B intake, Atlas 40, 295/75R16 BFG,
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post #2 of 14 Old 01-12-2013, 09:32 PM
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Tell me when you put your stock filter on and get info on it whether it made a difference or not. I have an 04 but been a long time since I had a stock intake. If it doesn't make a difference I would like to work with you on it. I guess I just like the abuse, in trying to learn and figure the 6.0 out.

2004 F250 Ext.cab fabtech 5.5" lift,and traction bars 35" on 18".2005-2007 grill and LED headlights,58v FICM, Warren dual HPOP system, fuel reg. return system, areo 1000a fuel pump, dual fuel filters, ARP studded heads, CCV reroute, EGR delete, 225/75 Warren injectors, water/meth injection (cooling mist),SCT tuner with customs, banks intercooler. MTW stage 4 turbo, built trans by Andy Warren, 4:10 Detroit lockers.
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post #3 of 14 Old 01-13-2013, 12:16 AM
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This is really odd, is it from blended diesel?

My mpgs keep going down with every mod because I can't keep my foot off the go pedal. LOL

Cameron
2006 F250 Lariat CCSB
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post #4 of 14 Old 01-13-2013, 11:51 AM
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X2 on the mods = loud pedal = low mpg. What are you gonna do?

But seriously, I have the Zoodad and an Airaid filter. When I took the restrictive front off of my box the mpg went up. Although winter idling/warm up has been taking it's toll.

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post #5 of 14 Old 01-13-2013, 01:06 PM
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Have you cleaned it at all? I know the aftermarket air filters need far more attention because they can't hold but about 10% of the capacity of dirt as a stock filter before air flow decreases. Just a thought.
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post #6 of 14 Old 01-13-2013, 02:46 PM
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Quote:
Originally Posted by lawnguy130 View Post
Have you cleaned it at all? I know the aftermarket air filters need far more attention because they can't hold but about 10% of the capacity of dirt as a stock filter before air flow decreases. Just a thought.
While they do require cleaning/maintenance/changing like any other filter, I disagree. Mine has been pretty dirty, complete with bugs, and there was no noticeable change in performance. For that matter, my filter monitor hardly moves.

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post #7 of 14 Old 01-14-2013, 05:43 PM
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Quote:
Originally Posted by fishmanwill View Post
Did anyone else notice a decrease in MPG after installing a air intake? I installed a S&B awhile back and noticed a decrease in MPG. I was looking back today at my records and there was a 2-3 MPG decrease since installing the air intake. I am going to reinstall my factory air filter and see if it increases. Did anybody else notice a decrease in fuel mileage after installing air intake????

Will
If you are still in the process of swaping intakes, could you get a maf reading from stock and S$B. My peak maf reading whent down with the S$B.

Aaron 2005 f250 552/1040 45k miles
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post #8 of 14 Old 01-14-2013, 06:59 PM
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Originally Posted by bondajb View Post
If you are still in the process of swaping intakes, could you get a maf reading from stock and S$B. My peak maf reading whent down with the S$B.
Aaron what does that mean?? The amount of air going thru the maf sensor is less? I didn't notice any mpg decrease but when I installed my intake I wasn't driving around like a grandpa trying to squeeze mpg out either. I did notice more off idle power and throttle response.



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post #9 of 14 Old 01-14-2013, 07:06 PM
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I know it is not less but where the maf mounts in the newcai tube it is larger and so there is more volume but less velocity. I swaped back and forth to double check. my peak maf readings drop 100 g/s.. I think that is the right measurement, with the s&b. I have asked a few people to check this for me but no one has.

Aaron 2005 f250 552/1040 45k miles
S&B. 4" mbrp, Arp's, Dual oil bypass. CCV fltr, Clnt fltr Mag trans pan 08 diff cover. 4.10's, 315's MotoMetal 951 & 5" lift.TGC trac bar, Bislstien Shocks & Dual stear stabilizer. B&W . Air Rides. Snows MPG Max. Edge Insight, fuel sens. DC Eng.185 alt. 58v ficm 6.4 Juger pump Fass sump
NO more mtw turbo
AJB Custom R.R.
AJB Custom y pipe
AJB P&P Intake
PHP Gryphon
Banks IC
BARDER Stg2
Warrens 175/30
P.I. T.C & input.
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post #10 of 14 Old 01-15-2013, 06:35 AM
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Best intake...was your stock system..its all thats needed to 500HP.
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