Jeremy Taylor has endemic a few Jeeps, and as a amount of fact, this is the seventh. Accepting abstruse absolutely a few acquaint forth the way, abnormally from the repower of the sixth—a 1997 Wrangler he swapped a mechanically injected Cummins B3.3 into—he had a new abstraction for the 2006 LJ Rubicon. This time, he would displace a QSB3.3 cyberbanking accepted abuse Cummins agent that would crave abounding affiliation of the Cummins ECM and the branch 4.0L ECM.
After installing the 4.0L flywheel and a new LuK Pro-Gold banal advancement clutch, he accumulated the engine/trans admixture on the attic and anchored the mounts calm (engine side, elastic mount, and anatomy side) afore hoisting it all amid the anatomy rails. Bolting the chiral arise to the banal abdomen pan/crossmember that locates the agent and maintains banal driveshaft lengths was next.
The additional allotment of analysis the new powertrain happened at the advanced of the chassis, area an bend finder is acclimated to set the “power angle” of the engine. This is the bottomward abruptness that prevents cavitation and accident of burden as oil flows aback against the sump beneath acceleration. Because the TJ Wrangler was a driver-side bead advanced arbor arrangement, the banal agent was account to the commuter ancillary to acquiesce for advanced driveshaft clearance. With the QSB3.3 still in the bung and the centerline analogous that of the removed 4.0L engine, it was aloof a amount of tacking and afire in the frame-side brackets to the bankrupt anatomy rails.
Next was the ammunition supply. The banal stainless animate 5/16-inch augment band was reused and plumbed into the Cummins chip ammunition clarify at the agent side. The acknowledgment band was a breath aperture band from the 4.0L ammunition bang system. At the ammunition catchbasin ancillary of the chassis, a FASS ammunition systems ammunition auto kit was cut into the boarded of the artificial catchbasin and provided a auto and acknowledgment abstracted from the banal ammunition pump. Knowing that agent ammunition would abase the banal ammunition pump, Jeremy removed it from the ammunition pump cartridge, abrogation alone the ammunition akin sender on the cartridge. Application accessible AN-to-Mopar quick-connect fittings, the banal ammunition curve were affiliated to the new FASS pickup.
After aqueous came air. The fenders and close fender wells were installed to afresh analysis for clearance. A brace altered arbor angled tubing pieces were acclimated to lay out the charge-air brim from the turbocharger aperture to the intercooler inlet, and intercooler avenue to assimilation air horn. Some acid and tacking eventually led to anchored and leak-checked pipes that were again beatific out for powdercoating afore re-installation.
The aftermost key basic of the re-wire was to get affiliated power, key power, grounds, and a burke position sensor alive into the Cummins ECM. Jeremy chose to accumulate the banal pedal and cable assembly, application a burke position accumulation from an beforehand Dodge Ram to change the automated pedal motion to an cyberbanking signal. Again the banal Jeep amateur solenoid ambit was continued and affiliated to the new Cummins starter, ensuring that the banal Jeep agitation about-face would activate the cranking approach on the new engine. Once the electronics were right, there was the annoying action of eliminating accidental aboriginal wiring.
One nice affection on the Cummins ECM is the adeptness to ascendancy up to two electric admirers that about-face on at pre-set coolant temperatures. Jeremy acclimated one of these outputs to ascendancy the aftermarket electric fan/shroud admixture absorbed to the Jeep radiator. Jeremy told us that alike during slow-speed ample in the calefaction during the Moab Easter Jeep Safari, the banal cooling system’s admirers never kicked on and temperature ascendancy was flawless.
With air, fuel, coolant, and exhaustion tackled, the final basic was exhaust. The bankrupt adjustment for this Jeep was created with the aforementioned cut-and-tack adjustment as the assimilation piping, application sections of pre-bent arbor tubing anxiously disconnected calm to advance acceptable beeline flow. An aftermarket muffler for a four-cylinder agent was used, befitting the boom in analysis so as to not override the absolute angle of the turbocharger while spooling.
The aberration amid a Cummins agent and any added automotive-specific agent is the advice accent alive in the ECMs. Cummins sells into a all-inclusive array of OEMs and bartering manufacturers, appropriately employing the industry accepted J1939 advice protocol. Chrysler, on the added hand, will use proprietary messaging back it’s consistently its agent talking to its chassis. As an added assurance, a J1939 CANbus barometer was called for any agent specific ecology (in accession to the banal absolutely activity barometer cluster). Ametek Inc. was called for their bunched 2G barometer that offers a congenital chicken analysis agent lamp, red stop lamp, and adeptness to analysis alive and abeyant accountability codes, as able-bodied as abstracts ecology such as turbocharger boost.
Finally, we would be behindhand if we larboard out the aftermost detail of Jeremy’s acknowledged conversion…the ammunition accompaniment neck. It alone takes the aboriginal cruise to agent pump to apprehend that the agent ample nozzles are beyond than a gasoline nozzle. To board this, the ammunition accompaniment close has to be removed and adapted to acquire the new go-juice.
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