Straight Pipe MPG? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 13 (permalink) Old 04-05-2014, 01:23 AM Thread Starter
Kris
 
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Straight Pipe MPG?

I'm getting fairly decent mileage with my SuperDuty at the moment but everyone keeps nagging me to pull my muffler and run it straight piped.

Is it worth it as far as MPG goes?

2000 F-350 4x4, 7.3L/6 Speed.
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post #2 of 13 (permalink) Old 04-05-2014, 01:30 AM
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Re: Straight Pipe MPG?

It will have no affect on mpg's. Sounds a lot better though


1997 F350 SRW CCLB 7.3 ZF5 4x4
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post #3 of 13 (permalink) Old 04-05-2014, 01:46 AM Thread Starter
Kris
 
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Re: Straight Pipe MPG?

None? At all? Everyone is always saying that it'll give ya more power and yadda yadda.

I don't want to do it simply to be louder. Grew out of that long ago, lol.

2000 F-350 4x4, 7.3L/6 Speed.
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post #4 of 13 (permalink) Old 04-05-2014, 02:06 AM
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Re: Straight Pipe MPG?

You will notice your turbo spooling a bit quicker, and truck may feel a tad bit more powerful, but nothing much. I say do it, 7.3's aren't loud unless they have 5" exhaust or stacks...


1997 F350 SRW CCLB 7.3 ZF5 4x4
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post #5 of 13 (permalink) Old 04-05-2014, 02:11 AM Thread Starter
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Re: Straight Pipe MPG?

Hmmmmmmmm. I was thinking of a larger diameter exhaust and a good muffler. May run straight pipes til then.

2000 F-350 4x4, 7.3L/6 Speed.
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post #6 of 13 (permalink) Old 04-05-2014, 02:20 AM
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Re: Straight Pipe MPG?

If you want just a little exhaust noise, go with a 4" kit, if you want a great sounding, slightly louder deeper exhaust note, go with a 5" kit. Stock exhaust that is straight piped just sounds raspy as hell, not in a good way imo...


1997 F350 SRW CCLB 7.3 ZF5 4x4
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post #7 of 13 (permalink) Old 04-05-2014, 02:28 AM Thread Starter
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Re: Straight Pipe MPG?

4" is about the largest I'd go. Just to make things flow well, not interested in it to be loud.

2000 F-350 4x4, 7.3L/6 Speed.
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post #8 of 13 (permalink) Old 04-07-2014, 03:52 AM
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Re: Straight Pipe MPG?

I've run straight 4" pipes for years.

Never noticed any improvement in MPG. Wish it did.

The turbo is a good enough muffler. Only difference is the turbo whistle.

2000 F-350 SC 4x2 6 speed
3.08 gears Gear Vendor Overdrive
Slammed 4"
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post #9 of 13 (permalink) Old 04-07-2014, 05:34 AM
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Re: Straight Pipe MPG?

I have a 3" dp and 4" sp with flow through muffler, not too loud running empty, but not too crazy when under tow. Hitting some hills though moving about 20mph will make some noise. :)

Kevin
96 F350 CC SRW 4x4 7.3 E4OD 4.10
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post #10 of 13 (permalink) Old 04-16-2014, 09:13 PM
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Re: Straight Pipe MPG?

So I started stock and that was a no-go due to the OEM muffler is a huge restriction, bad for EGT. Then I went 4" with straight through muffler. That was not too loud but the in cab drone was unpleasant, especially when towing, and especially when cold. Drone is no good. I added a resonator from ITE and now it is as quiet as stock but without the EGT and pluggage issues of the stock muffler.

I'm not a kid anymore either so loud and drone is not the right way to go. I could do loud but that drone. So lame.

2000 F350 SRW, 4wd, CCSB, PSD
Lowered rear end to F250 height, 4" exhaust w/ muff, foil delete, AIH delete, Ford AIS intake, tru-cool trans cooler, autometer under dash pod and gauges, Mile Marker hubs, 04 headlights, soft tonneau

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