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Thread: what fuel pressure to start with?

  1. #1
    boostaholic
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    what fuel pressure to start with?

    Ok, so I'm about to start tuning my car and wanted to know what a goo fuel pressure would be to start with. I understand that stock is 55psi with the vacuum line unplugged for a stock engine and here is where I need some clarification. I have a 89 2.5 in my car that's .20 over with stock injectors being ran off of a stock 89 2.5 smec. Do I start at 55 or something higher? I have a Accufab fpr in the car for adjustable I also have +40 available if it's better to run thoes and turn the fuel down. Just looking for a starting point.

  2. #2
    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: what fuel pressure to start with?

    Run 55PSI.

  3. #3
    boostaholic
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    Re: what fuel pressure to start with?

    Thank you sir. Didn't think the .2 would make that much different in fuel usage.

  4. #4
    turbo addict
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    Re: what fuel pressure to start with?

    If you don't plan to exceed the 14.7 psi boost cut-out, stock pressures with stock injectors will work great. What are your plans?

  5. #5
    boostaholic
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    Re: what fuel pressure to start with?

    For the break in I didn't plan on going much over 10. After that I plan on doing my own tuning. The car is just a toy so what ever happens to it doesn't matter much.

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