My 1984 D50 4X4 Turbo Diesel Build/Modify/Correct

[coyotefiveoh]

pull the down pipe off and take it to a shop get them to cut it and weld 2.5" as close to the collector/adapter as possible & shape it the same! or get one made which would be expensive i imagine?

[thillskier]

I Agree with Cyote...The closer and more uniform the bends etc as to the turbo outlet the better the flow and scavenging. You may even want to get someone (Corky Bell does a GREAT job on this and is reasonable read cheap for what he does) to port the turbine (exhaust) housing of the turbo. This will help the power, mpg's, torque, (especially lag reduction at boost initial spool up),make it safer as the waste gate will operate smoother (less turbulence), and lower EGT's as exhaust gets away from turbine and down pipe faster and with less turbulence. Try and run the exhaust as straight as possible, for less backpressure, lower EGT's, faster spooling, less delay on boost(lag), and higher boost pressures.
ALL good things!

[83Ram50TDinPA]

Ok, I'm looking at upgrading my exhaust, so tell me more about the coupling point. Could I put a 3" exhaust on ? If not, why so ? I haven't looked to closely at the turbo and the exhaust yet.