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  1. #1

    Rude2/Extreme with stock ECU

    Hi Guys

    I have 06 RXP and im thinking to go with rude2 or Extreme SC ( plus 4: flex intake , XS coolers, RRFRP..etc ) but i wanna keep stock ECU.

    1- What injectors size i may need?
    2- Will i need Welbro 255 pump?
    3- what the highest boost on 2rude/extreme on stock ECU ?

    What kind of top speed i would see??


  2. #2

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    Im wondering about the fuel pump where is the stock one maxed out??? I am at 15,5 psi and a RRFP at 64 psi Riva ecu and #50sI am at about 12/1 at WOT

  3. #3
    dduck dduck1628's Avatar
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    Quote Originally Posted by FreakRXP1200 View Post
    Hi Guys

    I have 06 RXP and im thinking to go with rude2 or Extreme SC ( plus 4: flex intake , XS coolers, RRFRP..etc ) but i wanna keep stock ECU.

    1- What injectors size i may need?
    2- Will i need Welbro 255 pump?
    3- what the highest boost on 2rude/extreme on stock ECU ?

    What kind of top speed i would see??
    1. 48's or 50's - injectors
    2. Some claim that you will, I don't. W/50s I'm nowhere near maxed out with the stock fuel pump. My WOT fuel pressure is at 58 lbs to achieve AFR of 11.9.
    3. 13.5 lbs of boost @ 8150 is what I see.

    I run 79 in the FL heat. Did see some 80s before it got hot. With some tweaking such as a ride plate mod I'm sure I can run a solid 80 in the heat. My mods are as follow:
    07 RXP stock ECU
    XS intercooler, 2rude, 4 inch intake, 50 lb injectors, Dual regulator "begi setup", Riva grate, 15/22R, pump wedge, 158 thermostat, riva rear exhaust.
    Hope this answers your questions.

  4. #4
    speedskixp's Avatar
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    Quote Originally Posted by FreakRXP1200 View Post
    Hi Guys

    I have 06 RXP and im thinking to go with rude2 or Extreme SC ( plus 4: flex intake , XS coolers, RRFRP..etc ) but i wanna keep stock ECU.

    1- What injectors size i may need?
    2- Will i need Welbro 255 pump?
    3- what the highest boost on 2rude/extreme on stock ECU ?

    What kind of top speed i would see??
    I run a ET extreme on stock ecu with 48s and a walbro with 70 lb wot pressure to get 11.9 A/F. I see a little over 14lbs boost @8100 rpms.

    I did run this set-up with the stock fuel pump and was able to get the A/F good but I was not seeing any rise in fuel pressure with boost until I did the walbro. I also suggest a duel reg set-up or a fuel controller to really dail it in and have a clean idle and mid.

  5. #5
    Moderator Snoman's Avatar
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    Quote Originally Posted by speedskixp View Post
    I run a ET extreme on stock ecu with 48s and a walbro with 70 lb wot pressure to get 11.9 A/F. I see a little over 14lbs boost @8100 rpms.

    I did run this set-up with the stock fuel pump and was able to get the A/F good but I was not seeing any rise in fuel pressure with boost until I did the walbro. I also suggest a duel reg set-up or a fuel controller to really dail it in and have a clean idle and mid.
    +1..Alot of guys are running the dual regulators with no problem..Im running the 2 rude on a Stock ECU BUT im also running a fuel controller..Im running a stock fuel pump and 50 LBS injectors with the regulators resource line disconected and the Regulator set at 58 PSI..Im seeing about 13.5 psi of boost at 8100..

  6. #6
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by FreakRXP1200 View Post
    Hi Guys

    I have 06 RXP and im thinking to go with rude2 or Extreme SC ( plus 4: flex intake , XS coolers, RRFRP..etc ) but i wanna keep stock ECU.

    1- What injectors size i may need?
    2- Will i need Welbro 255 pump?
    3- what the highest boost on 2rude/extreme on stock ECU ?

    What kind of top speed i would see??
    I ran stock ecu, 2Rude, 50,s, RRFPR, stock fuel pump. I didn't see any fueling issues stabilizing AFR at wot.
    I ran some 42,s and was maxed out running low to mid 12,s afr at wot. Idle will be a bit rough with 48s or 50s but can be bearable and now you can run a Begi to cure that.
    The walbro was not needed on my ski with stock ecu (posible ir would have left it stock longer it would have been an issue) but when installed the riva ecu I ran the walbro and it cured my wot fuel pressure issue.
    As far as boost approx 13.5 to psi on 2Rude at 8,100 rpm.
    80 mph can be done on stock ecu but will be a good goal if your looking for one.

  7. #7
    Dual regulator "begi setup" <--where can find it?

    The RRFRP effect adle, low end and midrange and the injectors effect on top end???

    I'm thinking to get 50 injectors coz i MAY get ECU later..who knows

    The water temp here hit high 90F

    What do u think getns??

  8. #8
    Quote Originally Posted by FreakRXP1200 View Post
    Dual regulator "begi setup" <--where can find it?
    +1

  9. #9
    Moderator beerdart's Avatar
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