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5.9 Fan wrote:You can get it to turn 5k with a gsk and good valvesprings. You need to think about what power level you want and at what rpms you need it. This comes down to cc's of fuel and cfm's from the turbo. Build your engine around the fuel you need and the boost/cylinder pressures that you you'll be seeing. Port and polish head, headstuds, if you are replacing pistons bore it out and run marine pistons so you have the 145* injector angle, good valvesprings, cam, big sticks, girdle if you think you need it, fire rings, benched pump with large delivery valves and aggressive plate. Nitrous will help spool a big charger and keep egt's in check somewhat. If it will live its life 300 feet at a time might as well fill the bottom half of the block with hard block, get rid of the radiator and run a custom water or ice to air cooler. Things get toasty at high rpms under load. I pulled for two years and never pushed it past 4k, 5k in my opinion is just a way for diesel performance shops to brag about who's d**k is bigger. Hope this helps
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