Upgrades and Aftermarket - 7.3L EngineUpgrading and adding aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
As the President of the Dahl flippers club, I welcome you to our fraternity. You certainly could plumb your filter that way but there may be air released from the fuel as it passes all of the various hose to hard line to hose connections. My fuel pickup is a straight pipe to the OEM tubing which was dremeled and reemed out to remove the rolled metal edge and then 3/8" i.d. hose runs from the tank forward to the Dahl filter which is mounted right behind the transfer case for protection. A 3/8" hose then leads forward to connect with the pump inlet.
Maybe I need to update a pic or two. I'm plumbed straight to the tank from the filter. That is the pre-pump mod still in the pic. My hard lines are just along for the ride since the Dahl install.
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2002 F-250 S/C LB, Auto, VDH5, 3.73LS, My Truck
Complete fuel mods, coolent filter, Heater Cutout Valve, Walker BTM, Gauges(Pyro,Water,Trans), Jody's Econo tuned PCM, Turbo LifeSaver, AIS Severe Duty Filter Kit, Dahl filter and CCV Reroute to exhaust pics. CCV to exhaust since 4/27/03.
Here's a shot of one mounted outside of the frame. It uses the Diesel Innovations tank pickup with the 5/8" steel pickup tube going into -10 Marine rated hose also supplied in the DI kit. The -10 then makes its way on to the SX pump in the stock pump location which takes a -8 to the heads. Since it's a Dahl 150 it stuck down pretty far at the T-case location due to its being about 4 or so inches longer, but at the spot next to the tank pickup the frame is at its highest point and the bottom of the filter is above the lowest point of the frame down near the T-case and only slightly lower than the bodyline.
It's on the outside because the fuel tank is on the inside at the high point of the frame, and also because it doesn't make the fuel lines reverse direction at all going through the filter. It would be nice if it wasn't outside the frame, but it is pre-pump, so if it were to take an impact from a wreck or from some large debris, it would just pull air not spray fuel everywhere being on the suction side of the system.
The Dahl 150 was used because it is rated at 80gph and the SX fuel pump is also rated at 80gph. It should be fine. The Dahl 100 wouldn't have kept up with the SX pump, but I'm sure it's fine for the stock fuel system. Talk to Bob at Dieselsite about them if you have questions.
Yeah, I've been reading and it seems like some webpages are saying that the 100 is small, and 8 cylinder diesels should be using a larger filter... Not sure if this is relevant or not...
WHere is teh cheapest to get the Dahl setup?
Also, would it be better to run a larger dahl?
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02 F250 PSD 7.3L
Cobra 29 NW ST CB radio
5% tint everywhere with 20% down the whole front windshield
Tymer intake setup
4 inch DP to a 5 inch straight pipe
Air Bag w\ compressor setup
triple gauge pod w\ Di-Pricol Optix (EGT,Boost,tranny temp)
CCV Mod, In-tank mod, Harpoon mod, Airdog Kit, AIH Delete
ITP regulated Return (8LL replaced with AD)
Oilguard Bypass Oil System
Dieselsite Coolant Filter, Fluidampr
ITP boost Annihilator, BTS Trans and T.C.
DP tuner 6 position, ATS housing
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So you have one tube coming from the tank to the Dahl, then to the pump? rather than cutting and inserting hoses?
[/ QUOTE ]Exactly. Every time there is a transition, there is an opportunity to release air from your fuel. My hose runs straight from the pickup over the frame, curving gently forward under the fuel fill tube and then back over the frame to the Dahl which is mounted inside behind the transfer case. The outlet from the fuel filter goes directly forward to the pump. No hard lines at all. No air problems now unless I run the tank way down. Fuel pressure is rock steady at 71 psi and the measured restriction was measured in cm of H20 and was low single digits IIRC, ie. no restriction at all.
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2002 F350 Lariat CC 4x4 Auto 4.10 DRW, DP-Tuner F5 live tuned stock, quiet, 40dd, 40, 60, 80 tow, 80e and 120r, B&W GN, BrakeSmart, 'pooned tank, tank and pre-pump mods, 2µ Dahl 100 filter, regulated return, BTS dual HPOP, AC singles with EDM 34 lpm nozzles, AIS, H2e, Spearco 6.0 IC, Hypermax 3.5" dp--> MBRP 4" 304SS exhaust, BTS tranny, 203º T-stat, Chevron ELC, coolant filter, Oilguard bypass with Schaeffer 9000, WranglerNW 200 amp alternator & Optima group 31 batteries, Nippon-Denso starter, SPA gauges, SteveRacer mods, Hella 80/100W 9007s, Hella Micro DE foglights, 1000FF driving lights, 220W backup lights, Stancor contactor, Michelin XPS Traction tires, X-Springs, Bilstein shox, custom bumpers but otherwise stock. Nov 30 '99 build engine with 16 K miles, Fluidampr, Comp Cam 910 springs, Melling LPOP and ARP headstuds. Alien-Patrol Customer Service Sucks!
If you want to run a monster pump, then you may need a bigger Dahl. At WOT, my fuel pressure does not budge so the pump can keep up with demand. Talk to Bob Riley, he can tell you what you need for your planned mods.
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2002 F350 Lariat CC 4x4 Auto 4.10 DRW, DP-Tuner F5 live tuned stock, quiet, 40dd, 40, 60, 80 tow, 80e and 120r, B&W GN, BrakeSmart, 'pooned tank, tank and pre-pump mods, 2µ Dahl 100 filter, regulated return, BTS dual HPOP, AC singles with EDM 34 lpm nozzles, AIS, H2e, Spearco 6.0 IC, Hypermax 3.5" dp--> MBRP 4" 304SS exhaust, BTS tranny, 203º T-stat, Chevron ELC, coolant filter, Oilguard bypass with Schaeffer 9000, WranglerNW 200 amp alternator & Optima group 31 batteries, Nippon-Denso starter, SPA gauges, SteveRacer mods, Hella 80/100W 9007s, Hella Micro DE foglights, 1000FF driving lights, 220W backup lights, Stancor contactor, Michelin XPS Traction tires, X-Springs, Bilstein shox, custom bumpers but otherwise stock. Nov 30 '99 build engine with 16 K miles, Fluidampr, Comp Cam 910 springs, Melling LPOP and ARP headstuds. Alien-Patrol Customer Service Sucks!
It looks like it would be hard to drop the bowl for filter replacement. Can you still get to the top to unscrew it?
I still have a brand spanking new 150 just sitting on the bench, complete with heater. I don't know if it would be a good idea to plumb the fuel line from the sump (bottom of the tank) up to the top of the Dahl, then back down to the pump. Would this be self defeating in regard to the positive pressure the sump was designed to deliver?
DZ
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2001 F250 Lariat, Super Cab, Shorty, 4x4, Harvest Gold, 7.3PSD, BTS Auto, 373 Posi, Tow & Camper Pkg, Heated Bun Warmers, 6 Disk With Kicker, Alpine, & Kenwood, TTM, Isspro EV, Gutted EBV, BB turbo, LED's, ARE Topper, Oilguard Bypass Filter, Coolant Filter, Tymar Intake, DP Chip, (Kim Lux's Lousy Injectors-GONE), Mini Me's, Water Injection, BWD Spearco 6.0 Intercooler, DP 6 position chip, live Tuning, DI FASS System, And A Few Other Toys. Factory Installed Knock. (PMT3) More To Come:
460/950 Corrected Prior To Water Injection and Spearco IC.
13.974 @ 95.65mph on PMR's
'07 Duramax Classic, Leather, Sunroof, Bone Stock.
No, it's easy to drop the bowl. There's actually about 2 inches above the T-bar. It was the best location I could find for a filter so long that has to be mounted vertically.
Good Luck
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Hybrid_Away is now know as Hybrid: Gone 0 hours and 0 minutes [img]/ubbthreads/images/graemlins/tongue.gif[/img]
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Every time there is a transition, there is an opportunity to release air from your fuel.
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Can somebody enlighten me a little on this? I am looking into a fuel system on my truck and want to avoid problems. I knew you guys eliminated the quick connect fittings and modified the pickup but what about this?
Tom
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96 F250SC 4X4 AUTO
F-6 live tuned, BTS Transmission, TN BB, Stage One Injectors, Custom electric fuel,
Sharp bends in the hose, sharp edges on fittings etc, cause turbulence and generate an air bubble stream if the flow rate is high enough. Take a look at the video I posted the link to above. Those bubbles are from the transition between the pickup outlet pre-dremel/reeming and 3/8" id. tubing. What do you think the velocity is in the significantly smaller i.d. hardline. Some have found better fittings for the Dahl filter than Bob Riley provides in order to avoid the 90º bend before and after the filter.
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2002 F350 Lariat CC 4x4 Auto 4.10 DRW, DP-Tuner F5 live tuned stock, quiet, 40dd, 40, 60, 80 tow, 80e and 120r, B&W GN, BrakeSmart, 'pooned tank, tank and pre-pump mods, 2µ Dahl 100 filter, regulated return, BTS dual HPOP, AC singles with EDM 34 lpm nozzles, AIS, H2e, Spearco 6.0 IC, Hypermax 3.5" dp--> MBRP 4" 304SS exhaust, BTS tranny, 203º T-stat, Chevron ELC, coolant filter, Oilguard bypass with Schaeffer 9000, WranglerNW 200 amp alternator & Optima group 31 batteries, Nippon-Denso starter, SPA gauges, SteveRacer mods, Hella 80/100W 9007s, Hella Micro DE foglights, 1000FF driving lights, 220W backup lights, Stancor contactor, Michelin XPS Traction tires, X-Springs, Bilstein shox, custom bumpers but otherwise stock. Nov 30 '99 build engine with 16 K miles, Fluidampr, Comp Cam 910 springs, Melling LPOP and ARP headstuds. Alien-Patrol Customer Service Sucks!
Some have found better fittings for the Dahl filter than Bob Riley provides in order to avoid the 90º bend before and after the filter.
Can someone post more information on the fittings that have smoother curves than a 90º bend? Photos, specs, part numbers, etc.
I plan on doing the intake modification from ITP. I also have the Dahl 100. I haven't done it yet, but the Dahl and truck seem to have a perfect bolt pattern match behind the transfer case. I think I just need to widen the holes on the bracket, and purchase 2 nuts. Hope it works out this easily .
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2000 F-250 7.3L Powerstroke. Build date 08/99.
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