I want to run 8 lbs of boost what will I have to change in the fuel system. Like Can I just buy some larger injectors or keep the stock injectors use a rising rate regulator and upgrade the fuel pump. If I need to get larger injectors what size injectors should I get to run 8 lbs of boost. Someone help me out here.
Fuel System at 8 lbs of boost
- Thread starter 99 gt
- Start date
Well I just used the search function and it told me that 36lbs injectors with no fmu would work well with my setup. Stock motor with bigger cams (not sure the lift but they where as big as you can go without having to get stronger valve springs) and a turbocharger pushing out 8lbs of boost. Sound about right on the injectors. Will I still need to upgrade the fuel pump or will stock work fine.
SVT Focus fuel pump or 03/04 Cobra duels plus 42lb injectors. you could use 36's but they wouldn't give you much room to grow.
jstreet0204
Active Member
Adjust injector size by power levels not boost. Boost is alright when camparing similar setups, but 8lbs on a kb is not equal to 8lbs on a turbo. 36lb injectors are good for a little over 400hp on a forced induction car with a bsfc of .65 and a 10% saftey margin. 10% is not that much, so I would go with 42's or higher. Plus it gives you a little more room to grow. You will need a different fuel pump, probably an aviator pump, or the cobra tank/pump setup is the best.
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