downpipe routing - Dodge Diesel

artieb · 09-21-2010, 09:50 AM

Hi, I was looking at my parts truck that is striped down to the frame. I looks like if we were to route the downpipe to the outside of the frame, it would allow much more room, larger diameter pipe, and sweeping bends. Also, I could put another inside frame mounted fuel tank. Anyone tried this?

Onemoparnut · 09-21-2010, 10:58 AM

Well you will have a tight fit near the tire still. And you will have inner fender to deal with.

unixcowboy · 09-21-2010, 02:39 PM

I went under the frame close to the end of the downhill portion - right alongside the engine adapter plate.

It's a bit of an angle you're looking at in the pic but clamp holding the 90 off the DP - behind the frame and higher than you can see - bumps the trans mount ears if I don't get it positioned correctly.

The setup lets me run my 5" exhaust - pic 2 - right behind my running boards up under the cab and bed. Keeps me from having to run the 5" under the frame and have it hang out vulnerable road debris and rocks - and allows me to cut across curbs easier

09-21-2010, 10:58 AM	#2
Onemoparnut Registered User Join Date: Apr 2007 Location: Southern New Jersey Posts: 3,856 My Photo Gallery My Classified Ads	Well you will have a tight fit near the tire still. And you will have inner fender to deal with. __________________ Bill 91.5 D350 regular cab dually 3.54, Built 518,Goerend convertor,potentiometer, isspro tach, 60psi boost gauge, pyrometer, trans temp gauge, fuel pressure gauge, 4" de exhaust, bd killer b 63/68/14, arp studs, ported and polished head, 3 piece manifold, 366 spring, DennyT II, Half turn from runaway, dap 5x14's, grid heater delete, custom air box and bhaf. Fass and 1/2" fuel lines . 208,000 mi. Kdp killed.

09-21-2010, 02:39 PM	#3
unixcowboy Registered User Join Date: Apr 2007 Location: Central Mi Posts: 666 My Photo Gallery My Classified Ads	I went under the frame close to the end of the downhill portion - right alongside the engine adapter plate. It's a bit of an angle you're looking at in the pic but clamp holding the 90 off the DP - behind the frame and higher than you can see - bumps the trans mount ears if I don't get it positioned correctly. The setup lets me run my 5" exhaust - pic 2 - right behind my running boards up under the cab and bed. Keeps me from having to run the 5" under the frame and have it hang out vulnerable road debris and rocks - and allows me to cut across curbs easier Attached Thumbnails __________________ '93 D250 Auto CC HX-40 60/65/17 w/hx50 flange - hit 57 held 55 psi OOPS => 6x16's <=, PS IC, CoolerTubz, 366 spring w/2 turn clipped, power screw bottomed-backed off 1 1/2 turn, M2 power pin, smoke screw fully out, custom AFC spring, modified top to get pin higher, '94 built trans - clutches and some hard parts, trans cooler under bed in front of rear wheel, 4510 w/4 1/2" intake and heat shield, htr grids MIA, 4" dp -> 5" pipe -> 5" Stack, 285's rear 265's front

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