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  1. #1

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    opinion on injectors

    i have an 06 rxt with an x charger with riva wheel upgrade, xs ic, rrfpr,4 inch air and i have 42's in it now......my question is will the 42's be enough for this set up, or will i need 48's these are all new mods for this year and havent got it together so i have no idea if the 42's will be enough. your thoughts please. thanks


  2. #2

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    ttt

  3. #3
    formerly Gold06RXP Turbo Nick's Avatar
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    42s will be enough. Set your base pressure at 60. Get a a/f gauge also to be safe

  4. #4

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    man i was hoping i someone would say that, but would it be safer to run 48's.... what is a good a/f mixture?

  5. #5
    speedskixp's Avatar
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    With a stock x-charger and 42s we have found that a base pressure of 58lbs on the rrfpr is needed in our conditions. Starting at 60lbs would be a good starting point but you may need a little more. 11.7-12.1 would be a good wot A/F.

  6. #6
    West Texas RXP skoepp's Avatar
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    I think you will be maxed out on RRFPR right now in cooler condtions. It might work in summer heat.
    THere are very few Riva X SC upgrade wheel and front housing reporting. Doesn,t Riva reccomend to put 50s in with this mod on X with stock ecu or am I wrong.

    Do you have way to check AFR????

  7. #7
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
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    Quote Originally Posted by speedskixp View Post
    With a stock x-charger and 42s we have found that a base pressure of 58lbs on the rrfpr is needed in our conditions. Starting at 60lbs would be a good starting point but you may need a little more. 11.7-12.1 would be a good wot A/F.
    He is going to be running the riva X charger upgrade kit... if it does what it says (20% increase in boost) he will be maxed out in fuel pressure with the 42# injectors in cooler weather

  8. #8

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    dont have a gauge but i will get one....ijust dont want to burn it up.

  9. #9
    speedskixp's Avatar
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    Quote Originally Posted by bigdaddyRXP View Post
    He is going to be running the riva X charger upgrade kit... if it does what it says (20% increase in boost) he will be maxed out in fuel pressure with the 42# injectors
    I think your probably correct. It is always better to go with bigger injectors and have some room to play instead of being maxed out.

  10. #10
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by bigdaddyRXP View Post
    He is going to be running the riva X charger upgrade kit... if it does what it says (20% increase in boost) he will be maxed out in fuel pressure with the 42# injectors in cooler weather
    Thats what i just said buddy.

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