Hey all,
Sorry it took so long to write this…just been real busy lately…anywho…
Turbo arrived Monday afternoon, but didn’t get off work till about 4 P. M. We were supposed to have some ‘fabricators’ from an auto shop help us out w/ the project, but they didn’t want to wait around for Denis to get done loading hay-trucks, so we decided to go at it ourselves. Actually got started on the project at about 7:30 P. M. (Hindsight being 20/20, we should have waited till Tuesday).
First thing was to yank the old turbo off
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Once it was off we decided to first cut the old flange from the HX-40 off right behind the weld…plasma cutter in hand, Denis went to work…not the cleanest cut, but he got the job done.
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Luckily for us, a buddy showed up w/ more experience in the fabrication/welding department and he was there to help the rest of the night. We cut off a good chunk of the new flange that was bought w/ the B1 and then started measuring for precision w/ the B1 in place. We ended up leaving 1” of the new flange on the top and 7/8” of it on the sides for the angle to fit and the two pieces to align evenly enough to weld. There were many MANY measurements and twists and turns and pushing up on the downpipe from below and moving things around and changes before we finally got where we wanted, but in the end it worked out
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Finally w/ the flange securely welded it was time to remount the turbo and check everything once more
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When everything aligned good we bolted it all back up and primed her with oil. Finally fired the blue-Cummins back up and let her sit and idle for 10 minutes while we cleaned up the shop. We finally got to this point at 11:20 P. M. It took us 4 hours to do this “small” job of cutting the old piece off and putting the new one in…when I order mine for my pickup, it WILL be coming w/ an entire downpipe!!! With the engine warm we headed out on the road…now the fun part!!!
The KSB1-B hadn’t been bolted up and running for more then 15 minutes when it was put to a WOT test…. boost went straight to 42 PSI and then steadily climbed, maxing out at 44 PSI w/ the regular Comp. We had done some checking w/ the old HX-40/16/80 and it took 4 full seconds from a dead stop before it spooled and started making good boost…w/ the B1, it is at least a full second faster and feels more like 2 seconds faster. At this altitude we are severely over-fueled and under-aired until you’re getting 30+ PSI boost. Also w/ the old HX-40 it took roughly 15 seconds to build 20 PSI boost while holding the brake pedal…w/ the B1, it’s about 7 which is the same as my HY-35/9.
We saw that once spooled the turbo pulled very hard…it was difficult to compare to the old turbo once it was spooled as that turbo ran great after she started spinning. EGT reduction at WOT w/ the regular Comp didn’t change any. We could still get 1450*F until 3rd gear lockup, and once the shift to fourth it would climb slightly higher. We did put my Drag Comp on his pickup and with it the EGT’s would climb straight to 1450* and then increase fairly quickly to +1600*F. It did however pull much harder w/ the Drag Comp (jeez, wonder why?!

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I have not rode in the pickup since the first night it was installed, but Denis did say it was running very good the next night w/ ambient temps of about 60*F. The first night of testing it was about 60* and had been raining all evening. He still isn’t convinced that the KSB1-B is the Holy Grail of turbos for him, but I truly believe that he will not be happy till he has twins on w/ instant spool much like a gas rig…insane is the word that comes to mind, and yes, he probably will go w/ Kurt’s twin setup if it comes to that (and bigger injectors too).
We will be taking the pickup to Redding, CA on Sunday, somewhat to get a feel for how it runs at lower elevation, and somewhat to pick up Luke who is taking his ’97 down there for the DTT treatment. I will report back after that as far as how it runs/spools when it’s got all the air it wants, compared to when it’s always begging for more.
Sorry for being long, but I wanted to be detailed. I do have all those pictures and many more in full size, high-resolution form if anyone would like them in more detail…. just email me at -- email address removed --.
Later all, Josh.
Oh, almost forgot…I talked to Kurt today for about ½ hour on the phone about the EGT problems…he gave us some ideas for reducing the EGT’s (Better air intake, activate internal wastegate) and the next turbo may come w/ a standard housing to see if that helps too…we’re not sure we want to give up that much spool yet though. Kurt has been great to deal with and I would definitely recommend this turbo to anyone…I’d bet that if we can break it, he’ll buy it back too.