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24 Valve 2nd Gen Dodge Cummins 98.5-02 Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps

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  #1  
Old 01-23-2009, 11:03 PM
johnboy's Avatar
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Default Boost Elbow

Boost elbow

is this only an option if youre running the edge juice? because i have these brass fittings at work that i can get for free so i dont have to pay the 25 bucks these guys are selling it for. will it matter or do anything if i do this without an edge?


im just trying to find all the things that i can do to my cummins for cheap (or free) to help build power and what not.

johnboy's Sig:2001 Dodge Ram 2500 SB 4x4 24V; silencer ring MIA; BHAF; cut up exhaust; bald rear tires.

next to come; J-Hook, gauges and programmer

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  #2  
Old 01-24-2009, 12:16 AM
Uncle Bubba's Avatar
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Theres several options for these elbows but yoy do need to use a real one. they may look like a plain ole elbow but they have a vent hole in them that slowly releases pressure and thats what fools you truck sensors.

Uncle Bubba's Sig:

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99 Quad Cab, 4wd, Drag Comp W/Pump Wire & Boost Elbow installed, K&N Air Canon, MBRP exhaust, Belt Drive Lift Pump and bottom Bulkhead feed from the tank, Isspro EV Pyrometer, Boost Gauge, Fuel Pressure Gauge, DT Pro Fab Trac Bar, South Bend 13-1.25 Con O Clutch, Ranch Hand Bumper, Borgeson Steering Shaft, Black Silicone Boots, 2" Lift Soft Ride Front Coils, Solenoid High Idle Kit, Bilstein 5100 HD Shocks, Rickson 19.5 Wheels w/Hancoock Rubber, HD Maxx Link Sway Bar Links, Superlift dual front stabilizer, EGR Brakes Front and Back, RV275 Injector's, Blue Chip VP44, Prodigy brake controller, B&W Gooseneck hitch and more I can't remember right now. Not to mention more to come I'm sure.
374.2/846.7 at 30psi

Have front end or steering problems, read this through thread: http://www.dieselbombers.com/5-9l-24...d-rebuild.html
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  #3  
Old 01-24-2009, 03:06 AM
Fishin2Deep4U's Avatar
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An adjustable elbow will give you more control.

The function of the elbow is that a very small bleed hole allows some boost pressure from the compressor to be lost. This lower boost threshold is "seen" by the wastegate. So, if you have 20 psi at the compressor and you bled off 5 lbs, the wastegate will only get 15psi. This allows the compressor to build higher boost levels.

Essentially, the wastegate still opens at 20 psi. It just doesn't see the real compressor pressure. An adjustable elbow allows for more air to be bled than the Edge type elbow alone. If you have some precision drill bits, the Edge elbow can be opened up slightly and this will raise boost. Went too big? Peen the hole with an old check ball or a good punch.

These elbows do NOT raise boost on their own. This is the mechanical means to do so. The engines ECM will still defuel to 22 or so psi measures at the MAP sensor unless you have an aftermarket box or some boost fooler device plugged into the MAP sensor.

Dave

Fishin2Deep4U's Sig:'02 Dodge CTD - Mostly stock.

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