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  1. #1

    Input requested before I commit to this setup on RXP over the winter

    My sig shows what's already on my "mod" boat. Here's the list of parts I have that I'm planning on installing over the winter:
    • Fizzle HE IC
    • Bosch 48# injectors
    • Riva 8650 ECU
    • Solas 15/20 prop (but will pitch appropriately when all mods are installed)
    • SS Wear bling
    • RRFPR + pressure gauge
    • Danny's fuel rail
    • "Torque plate" exhaust manifold spacer
    • X-charger with ET 137 wheel + 4mm spacer
    • Supertech valves, springs, retainers, keepers
    • Riva Pro 08+ thru-hull exhaust setup
    • AFR + Boost gauge
    • Thermostat upgrade
    • Groco filter (with exhaust cooling bypass)

    Any reason why all these components shouldn't work together properly, and require only me fiddling with the FPR settings to achieve reliable performance?

    I bought the 48# injectors when I was only planning on the X-charger with standard X wheel. But got a good deal on the ET wheel setup, so wondering if I might need even more pressure... and maybe even consider a Walbro pump upgrade.


  2. #2
    Banned User
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    Upgrade the fuel pump, the 48's on a RRFPR should be good as long as you can monitor your AFR's accurately...

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  4. #3
    wotxxxsd's Avatar
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    You need to see the Dooo Dr..

    You are ate up with the mod bug...

    Rip on....

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  6. #4
    AtoMIC_OraNGE greenbullet's Avatar
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    youll need a walbro.. its cheap insurance... and easy to install.. any questions just ask me and I can help.... as far as the 137 youll be FINE with the bosch 48s .. I don't care whos CMD duty cycle tells what and how much .. I ran the 137 and 140 chargers on bosch 48s and many others have as well... your RRFPR will need to be bumped up but if you can install a beGi youll get clean afrs right acrossed the board. Many are running riva ecu and the etech 137 issue free on 48s so youll be fine but youll need a walbro pump but monitor AFRS proper. contact slow 91 for one...

  7. #5
    Quote Originally Posted by wotxxxsd View Post
    You need to see the Dooo Dr..

    You are ate up with the mod bug...

    Rip on....
    RIGHT? LOL.

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  9. #6
    skigolfnut's Avatar
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    + 1 on the walbro, my stock fuel pump would not keep up with the X charger I had in first, put in the walbro and presto problem solved,
    see picture of my old pump and filters,
    I raced some with the green bosh 42"s and with the ET-137 wheel, the 42"s weren't enough, I was getting lean at WOT at 8600 rpms, I now use 80lb injectors and they are spot on thru the complete range, but I have the static line unhooked,
    Put your RRFPR close enough under the seat were you can adjust it with the seat pulled back on the water,
    with everything dialed in you should see +77 mph
    get you some frog Skinz to let the hot air out,
    good luck
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  10. #7
    West Texas RXP skoepp's Avatar
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    Might as well put a good ride plate.

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  12. #8
    Lightning1's Avatar
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    I am right where you are at, I wold ditch the fuel rail unless you want the bling factor. I upgraded mine with at walbro and RRFPR and kept the stock system. I wouls also second guess the torque plate as ?I have heard they are hard to keep sealed, but that is what I heard. I am goung to be doing the ride plate as I have heard nothing but good things from them, so that is my plan for the winter.

    Other than that, you are going to love the power of the 137+4, it is a ton of fun.

    Good luck!

  13. #9
    Site Admin Green Hulk's Avatar
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    Steve your list looks great and I agree with the recommendations, but use the Riva Aeromotive fuel pump kit. It comes complete with all marine grade wiring to run the fuel pump off of a relay and fuse protection. Have a look
    http://www.4-tecperformance.com/inde...oducts_id=2093

  14. #10
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by Lightning1 View Post
    I am right where you are at, I wold ditch the fuel rail unless you want the bling factor. I upgraded mine with at walbro and RRFPR and kept the stock system. I wouls also second guess the torque plate as ?I have heard they are hard to keep sealed, but that is what I heard. I am goung to be doing the ride plate as I have heard nothing but good things from them, so that is my plan for the winter.

    Other than that, you are going to love the power of the 137+4, it is a ton of fun.

    Good luck!
    I agree ditch the fuel rail. It is totally not needed and just gives more chances of a fuel leak. Fuel leak in a hot engine compartment = not good.

    Lightning, there are no sealing problems with the Rad4 torque plate. This is the original. I have seen fitment and sealing problems with the other cheap copies.

    The original!
    http://www.4-tecperformance.com/inde...oducts_id=1213

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