Build the Best Duramax on a Budget

The Duramax engine platform mated with the Allison transmission has been established 12 months after 12 months to be one of the pleasant combinations in diesel performance. These vans are the lightest of the huge three and are smooth to make into weekend warriors without draining your financial institution account. Each technology of Duramax has execs and cons, from the LB7 to the LML, however, with some fixes, all of them may be a dependable day-by-day motive force that also has masses of strength while you positioned your foot into it. I am going to list out the pleasant bang to your greenback mods on every of the Duramax platform.

A Bit of Duramax History

It commenced with the LB7 again in 2001. The LB7 modified the sport in diesel performance, being the primary to the marketplace not unusual place rail injection gadget mated with one of the nicest transferring and managed transmissions to this day.  The 300HP Duramax and five-pace Allison mixture changed into now the truck to beat. Dodge and Ford needed to step up their recreation to compete with this new platform. The LB7 is a wonderful truck no matter the injector troubles they had been cursed with.  If you very own an LB7, you’ve got possibly finished a fixed of injectors, or as a minimum recognize approximately the scary white smoke at idle which means you’re dishing out heaps for a fixed. With the injectors being below the valve cover, it makes for an extended process to update a fixed.

In 2004 the LLY changed into delivered wearing a VNT turbocharger and upgraded injectors that have been reachable while not having to cast off the valve covers. The LLY additionally got here mated as much as the five paces Allison one thousand transmission and had a better HP score than the LB7 at 305HP. In 2006, GM modified it up once more with the LBZ. These vans got here out with the 6-pace Allison, a huge bounce in strength over the LLY at 360HP. LBZ’s have a comparable injector layout to the LLY and feature the pleasant CP3 injection pump this is nonetheless fashionable to this day.

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The faucet shift transmission with complete guide mode made those vans a towing device that would nonetheless rule the tune at the weekends. In 2007, with the brand new frame fashion from GM, the LMM changed into delivered. Boasting 365HP, the LMM engine itself may be very much like the LBZ, however with the advent of the DPF gadget, those vans have been cursed with terrible gas mileage from the start. With the ideal adjustments, those vans can get the identical mileage that preceding variations have been getting, however with the luxury of the brand new frame fashion and loaded with capabilities within the cab. In 2011, GM delivered the LML vans, the LML had a huge bounce in strength and positioned those at 397HP out of the box, and with the addition of DEF Fluid and the SCR gadget, the mileage on those vans went up significantly. They have the identical 6-pace transmissions that have been determined in preceding years, however with a few inner improvements to address the more strength. The injector layout and EGR modified pretty a piece from the sooner vans and made those engines a touch extra paintings to get at.

They got here out with the CP4 injection pump which has additionally had its percentage of issues over the years. 2017 got here along, and the L5P Duramax changed into delivered into the sector as the most important strength Duramax GM has ever produced at 445hp and 910 lb/feet out of the box. These vans have been established to be the maximum effective Duramax available in the marketplace however are nonetheless presently locked down tight with regards to tuning options.

Before I listing out adjustments to cater to every truck, I will point out that not one of the Duramax vans has a gas elevate pump. They all depend totally on the injection pump to suck gas out of the tank and crank it as much as commanded rail pressure. To start, a FASS pump is the primary aspect I will propose for any of the Duramax platforms.