Thoughts on the 4" exhaust - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 04-27-2007, 05:24 PM Thread Starter
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Thoughts on the 4" exhaust

After a little more than a month with a new 4" exhaust, I must say it does make a difference. My mileage is between 19 and 20 MPG, 16 when towing my 5th wheel, and it doesn't seem to struggle on the hills as much. I've also started using the Lucas fuel treatment, which seems to have cleaned things out. I do notice the injector rattle a little more, but everything is running smooth.

This is a Diamond Eye exhaust, and it seems to work well. However, there is a rub, the installer used a piece of the old exhaust to make the connection between the 3" down pipe and the 4" exhaust pipe. Another Pwr stroker pointed this out to me. Makes me wonder if this is normal or the installer took the easy way out. Has anyone else seen this with Diamond Eye exhaust? My way of thinking is, if you pay for "NEW" turbo back, no used parts or portions should be involved in the process, hence the description " NEW Exhaust from the turbo back". Sorry for the brief rant, I have one of those anal moments every now and then.( cause I'm older than dirt)

Bottom line, 4" is much better than stock, I'm a believer!

The best defense is a good offense, and I'm really offensive!
2000 F-350 Super Duty Crew cab dually, 7.3 PSD, 6 speed, airbag overloads,Prodigy brake control, 120 gal aux fuel tank, Zoodad, HX crossover pipe, DYI intake
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post #2 of 7 Old 04-27-2007, 05:35 PM
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Congrats! How is the sound?

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'97 F-350 "FORDOR" 4X4 (Dually Conversion, Shackle Reversal, Technicooler , Auto Meter Gauges, 4" DIY Dual Exhaust w/ '08 tips, 4" DIY intake w/ AEM filter, Wicked Wheel 2, 360 thrust bearing, Homemade E-fuel conversion, Wildman Chip, 160cc DIY injectors , DIY IDM mod) 230K and counting...
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post #3 of 7 Old 04-27-2007, 05:46 PM
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I put a FBD 4" exhaust on mine, gutted the cat, installed a free-flow muffler, and installed an upgraded intake elbow. There is a noticable difference in throttle response, a little more power and much better sound. I did it myself, so, no used parts. If you are happy with it, I wouldn't worry about it. Enjoy it.

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Mods - 4" FBD Turbo-Back Exhaust with Free-flow Muffler. Power Intake Elbow from Dfuser. Bug Shield. Vent Shades. Aries Step Bars. Custom heavy-duty floor mats. High Idle Mod (great!).
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post #4 of 7 Old 04-27-2007, 07:42 PM
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Nice to hear gramps, are you happy with the sound as well? Oh yeah, and whats next on your list?

1995 Reg Cab F350
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post #5 of 7 Old 04-27-2007, 08:12 PM Thread Starter
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The sounds great, deep and throaty. I forgot to mention, I did put a 5" MBRP stainless tip on as well.

As to what's next, I'm not sure. Thinking about an electric fuel pump in line to use as a lift pump. Will that help reduce air in the fuel? Also wondering about HPOP's. Is FoMoCo the only source for these or are there after market products out there?

The best defense is a good offense, and I'm really offensive!
2000 F-350 Super Duty Crew cab dually, 7.3 PSD, 6 speed, airbag overloads,Prodigy brake control, 120 gal aux fuel tank, Zoodad, HX crossover pipe, DYI intake
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post #6 of 7 Old 04-27-2007, 08:45 PM
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Not too sure on the elec. pump pushing on the mechanical pump???? Hopefully Tubzz might shed some light on this subject. I would think it might cause the mech. pump to malfunction, but I'm not too smart so I could be way off. As for the HPOP's check with the vendors here, and beansdieselperformance.com I know there are Delphi units out there, however I do not know if they are just reman ford units?? So sorry I'm no help.

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post #7 of 7 Old 04-28-2007, 09:40 PM Thread Starter
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Stroked95,
Believe me, every response is helpful. Just knowing someone is trying gives you the feeling that someone cares. Good thing in this day and age. I Googled "Delphi", and found several better deals than from the dealer. Dealer here wants $798 , I can get one on line for $366, reman. or $520 with a new IPR already installed. Thank You Sir, you have helped greatly.

On the electric pump, seems to me, I read something about using it as a lift pump, so the mech pump works less keeping fuel pressure more stable and helping to reduce the amount of fuel vapor ( air) generated to a minimum. I'll have to research it some more.

The best defense is a good offense, and I'm really offensive!
2000 F-350 Super Duty Crew cab dually, 7.3 PSD, 6 speed, airbag overloads,Prodigy brake control, 120 gal aux fuel tank, Zoodad, HX crossover pipe, DYI intake

Last edited by Gramps; 04-28-2007 at 09:45 PM.
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