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  1. #1

    V-tech tunes and base psi

    are v-tech tunes created and tuned for a set 58psi base with the engine off and pump running or set after the engine is running?


  2. #2
    SLASHER's Avatar
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    Key in and fuel pump running ...

    Get an AFR as I had to increase fuel pressure to get the AFR down to 12 ...

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    ATNryan's Avatar
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    I was told to set my rising rate at 58psi running their 8650 tune. It was nearly dead on, had to add 2lbs to get it right on at 12, but thats when it was still pretty cold here (65 degree air, 45 degree water). Now I am pulling some fuel out and sitting right around 56psi. As the summer goes on, I am sure I will have to take a lot more out.

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    SLASHER's Avatar
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    I had to add 5 pounds from summer to winter here ...

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    Adrenaline Junkie's Avatar
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    How far off are the stock fuel pressure regulators from 58? Is the cost of a Riva RRFPR justified to lock in 58? Maybe better off looking at the AFR and modifying the map?

  6. #6
    do we set it with a running engine or do we wake the pump up with the key and set it in the 3-4 seconds it runs?

  7. #7
    stuckmoto's Avatar
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    Quote Originally Posted by silicon View Post
    How far off are the stock fuel pressure regulators from 58? Is the cost of a Riva RRFPR justified to lock in 58? Maybe better off looking at the AFR and modifying the map?
    Good question...seems the way to go is just set a base psi and adjust maps now, rather than adjust fuel pressure via rrfpr. Isn't that why they want us to use a fpr because the stock regulator is too variable?

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    SLASHER's Avatar
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    Adjust with reg and map ...

    Always changing from winter and summer ...

  9. #9
    lets say the afp is to lean do i add more psi or do i remove psi?

  10. #10
    SLASHER's Avatar
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    Quote Originally Posted by DR2006RXP View Post
    lets say the afp is to lean do i add more psi or do i remove psi?

    Add PSI ....

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