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Optimising drag car

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As the title says i am currently building a tb48 fully modified engine with a turbo charger and staged injection which will run on a motec m800, just want to ask if there are any specific stuff in tuning to consentrate on for drag applications

That's quite a broad question with potentially quite a lot of different answers. Assuming that you're making more power than you can put to the ground in the lower gears, power management is very important to focus on. This may include aspects such as gear or speed dependent boost control. I also regularly made use of timers to remove timing off the start line to control power delivery. The other aspect that's going to be important is focussing on your launch control to achieve a suitable launch rpm as well as achieving sufficient boost pressure quickly.