Re: TN T and SuperT series.
Durability can be enhanced greatly by ordering the “TUFF-TURBO” option for your new turbocharger. The “TUFF-TURBO” option is available for all T4 series, 60-1, and 62-1 turbochargers. This TURBONETICS exclusive option utilizes O, P, or Q trim turbine wheel shafts, and the “stagger gap” piston ring. Specially developed for competition applications, the “TUFF TURBO” option includes the “big shaft” with a larger bearing structure, larger thrust bearing and a left-handed nut. The “big shaft” virtually eliminates the destructive shaft motion normally associated with high boost. The “TUFF-TURBO” option is available with dynamic seal only.
Recognizing the need for a higher flow capacity turbine to match the capabilities of the 68-1 and the “T” Series compressor wheels, TURBONETICS has developed the “Q” trim. Incorporating all of the features of the “Tuff-Turbo” option, the “Q” trim represents the largest diameter turbine wheel that can be mated to a properly machined TO4B turbine housing. The result is a 12-15% increase in choke-flow limitation which significantly reduces turbine backpressure.
All this is older info, im not really sure how much of it is stilll current, or really if any of it relates to diesels at all.
99.5 cc lwb drw lariat, 6 speed. Intake, exhaust, 38r, tunes..
2001 psdxcab xlt 6speed 4x4. afeII pg7, mbrp 4", DP-Tf5,SBC 12cb 3600# DD, 18x9moto's on 35's ,.... some other stuff
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1982 vw syncro 5speed 4x4, suby 2.2L air lockers, 30"tsl's:
1968 barracuda formula S