Attention: TDR Forum Junkies Thought I would share my story regarding my new Super B turbo installation. About 2 weeks ago I was traveling on the highway and stepped on the pedal pretty hard to avoid getting into a tight spot with an 18 wheeler... BOOM! Had to pull over as I was pushing out some heavy black smoke and a strange and ugly whine coming from under the hood. Long story short, blew my factory turbo! After a few hours in the 110 degree HOT Texas sun the factory turbo was out and I could see the obvious issue, broken shaft and compressor wheel lodged in the housing. What a sight!
I ordered a new "Super B" Turbo and 2 piece manifold from BD Diesel and the installation went pretty smoothly. It came with a new HX40 downpipe that married up to my existing 4" MPRB exhaust system just fine. After all was installed I fired up my truck and took it for a test drive. NOT HAPPY!! Had my Smarty TNT on level three and my MP-8 about 30%. EGTs were up about 100-200 degrees, increased black smoke and the boost pressure could only be maxed at about 25 PSI. Very laggy and the PEP was gone!! My factory turbo could hit about 35-40 PSI easy. I did some reading on TDR and Cummins Forum and all seemed to point to boost leaks. The factory wastegate is supposed to be set for 40 PSI so I figured don't mess with it. I also wound up ordering a complete set of new red silicone boots from Extreme PSI and installed. I also fabbed a pvc leak tester, sprayed some shaving cream on all joints and pressured up with my compressor with no leaks anywhere. I was beginning to think that maybe I need bigger injectors... not enough fuel??? Even with the MP-8 turned up to 100% I could still only get about 23-25 PSI of boost. . WTF! I was beginning to think, did I get a bad turbo? Then I thought, what if the wastegate really isn't set from the factory at 40 PSI?? Should I trust them??? Well after about 2 weeks of this worry I figured I would finally pull the wastegate hose off and hook up a barbed connector and shoot some air to see how much pressure it takes to move the wastegate rod. Well low and behold, I could see that the wastegate rod moves up at about 20 -25 PSI. I think it is impossible to get at that rod with the turbo installed so I removed the boost elbow and plugged the hole with a threaded plug, pulled the hose off and capped the air input to the wastegate. Took my baby for a test drive and damn... . I am back in business! EGTs are now lower by about 100 or so degrees and the PEP is back with a vengeance! Boost can max out about 35 to 40 PSI with my Smarty alone! Add some rail pressure with the MP-8 and this Turbo spools up very fast now with boost pressures that are definitely normal for a turbo like the Super B. I know this is a long story but others may some day be in the same boat. Don't trust the factory. . check the obvious, and in this case it happened to be a wastegate NOT set at the 40-45 PSI as stated. I do plan to hook up the wastgate hose again by removing the turbo/manifold so I can properly adjust the wastegate rod using compressed air. I'll do this when the temperature here in South Texas is no where near 110 degrees so I don't sweat my arse off again. Thanks for reading and thanks to all the contributers to this fine resource!
I ordered a new "Super B" Turbo and 2 piece manifold from BD Diesel and the installation went pretty smoothly. It came with a new HX40 downpipe that married up to my existing 4" MPRB exhaust system just fine. After all was installed I fired up my truck and took it for a test drive. NOT HAPPY!! Had my Smarty TNT on level three and my MP-8 about 30%. EGTs were up about 100-200 degrees, increased black smoke and the boost pressure could only be maxed at about 25 PSI. Very laggy and the PEP was gone!! My factory turbo could hit about 35-40 PSI easy. I did some reading on TDR and Cummins Forum and all seemed to point to boost leaks. The factory wastegate is supposed to be set for 40 PSI so I figured don't mess with it. I also wound up ordering a complete set of new red silicone boots from Extreme PSI and installed. I also fabbed a pvc leak tester, sprayed some shaving cream on all joints and pressured up with my compressor with no leaks anywhere. I was beginning to think that maybe I need bigger injectors... not enough fuel??? Even with the MP-8 turned up to 100% I could still only get about 23-25 PSI of boost. . WTF! I was beginning to think, did I get a bad turbo? Then I thought, what if the wastegate really isn't set from the factory at 40 PSI?? Should I trust them??? Well after about 2 weeks of this worry I figured I would finally pull the wastegate hose off and hook up a barbed connector and shoot some air to see how much pressure it takes to move the wastegate rod. Well low and behold, I could see that the wastegate rod moves up at about 20 -25 PSI. I think it is impossible to get at that rod with the turbo installed so I removed the boost elbow and plugged the hole with a threaded plug, pulled the hose off and capped the air input to the wastegate. Took my baby for a test drive and damn... . I am back in business! EGTs are now lower by about 100 or so degrees and the PEP is back with a vengeance! Boost can max out about 35 to 40 PSI with my Smarty alone! Add some rail pressure with the MP-8 and this Turbo spools up very fast now with boost pressures that are definitely normal for a turbo like the Super B. I know this is a long story but others may some day be in the same boat. Don't trust the factory. . check the obvious, and in this case it happened to be a wastegate NOT set at the 40-45 PSI as stated. I do plan to hook up the wastgate hose again by removing the turbo/manifold so I can properly adjust the wastegate rod using compressed air. I'll do this when the temperature here in South Texas is no where near 110 degrees so I don't sweat my arse off again. Thanks for reading and thanks to all the contributers to this fine resource!
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