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  1. #1
    Ski Hacks MG's Avatar
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    Does this MPH sound about right with this combo?

    Carter's Lake, Ga - 209' elevation - 81 water temp - 80 air temp - 3 bars fuel - 280 lb rider

    2009 SHO Cruiser
    R3
    Riva Intake Grate
    Riva B1 Wheel
    SVHO Intercooler
    Solas 13/22

    74.5mph GPS (Stock ride plate) @7930 RPM (TTO)

    I'm only getting 8-9psi on the boost gauge so I pulled the manifold, checked all gaskets, clamps, etc and went back out today and same thing. 8-9psi. The 13/22 could be holding me back.
    Last edited by Ski Hacks MG; 09-14-2014 at 04:44 PM.


  2. #2

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    Quote Originally Posted by CCW View Post
    Carter's Lake, Ga - 209' elevation - 81 water temp - 80 air temp - 3 bars fuel - 280 lb rider

    2009 SHO Cruiser
    Riva R3
    Riva Intake Grate
    Riva B1 Wheel
    SVHO Intercooler
    Solas 13/22

    74.5mph GPS (Stock ride plate)

    I'm only getting 8-9psi on the boost gauge so I pulled the manifold, checked all gaskets, clamps, etc and went back out today and same thing. 8-9psi. The 13/22 could be holding me back a little but I cannot check RPM's until I get my tach installed Saturday morning.
    Stock plate? The best mod I did on my 2009 FX was getting the stock plate cut by Jim. I netted 3.5mph off that plate. Dollar for mph that's your best mod. If you add that your at 78.

    You need to find out what your RPMs are to find out if your boost number is right. But by far get the plate. Seriously it's the cheapest mph you can get.

  3. #3
    AWA MEMBER
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    Repitch that prop and you might get 1-1.5 mph that will put you real close to 80

  4. #4
    64physhy's Avatar
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    Did you do the ribbon delete? I don't see it in your mods, and that thing restricts a lot of flow.

  5. #5
    speed is about right but the combination of parts isnt the best for speed.repitching the prop and loosening up the hull would get you started.when i had the B1 i saw 81mph @ 8250 with a skat impeller

  6. #6
    64physhy's Avatar
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    I was at 80 with a similar combo of parts (R3, B1, JD intercooler), but the prop was a skat of the same pitch and I was running the R&D rideplate. That was on my FZR, so between the different hull and rideplate, the FX would be a little slower.

  7. #7
    Don't do anything till you check your RPM! Also, Riva R3? Do you mean a R&D R3 reflash? If you have this reflash, did you do an engine cooling upgrade kit? If not you need to for sure. Also, depending upon what RPM you are turning (more rpm=more boost=more heat) the stock SVHO intercooler is not going to get the job done for you. They're better than the SHO IC, but nothing like a Riva Power Cooler or maybe a Fizzle. You should really think about upgrading the intercooler. If you're engine and intake temps are getting hot, the ECU will pull back timing/throttle to recover. As a result you will slow down. This could be hurting your performance as well. I would estimate you want the RPM to be around 8250-8300 with this set up. (cold motor) When it warms up you will be down about 100 RPM. Any more RPM than this & you can be jeopardizing the reliability.

  8. #8
    Ski Hacks MG's Avatar
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    Quote Originally Posted by 64physhy View Post
    Did you do the ribbon delete? I don't see it in your mods, and that thing restricts a lot of flow.
    Yes.

  9. #9
    Ski Hacks MG's Avatar
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    Quote Originally Posted by bamf View Post
    Don't do anything till you check your RPM! Also, Riva R3? Do you mean a R&D R3 reflash? If you have this reflash, did you do an engine cooling upgrade kit? If not you need to for sure. Also, depending upon what RPM you are turning (more rpm=more boost=more heat) the stock SVHO intercooler is not going to get the job done for you. They're better than the SHO IC, but nothing like a Riva Power Cooler or maybe a Fizzle. You should really think about upgrading the intercooler. If you're engine and intake temps are getting hot, the ECU will pull back timing/throttle to recover. As a result you will slow down. This could be hurting your performance as well. I would estimate you want the RPM to be around 8250-8300 with this set up. (cold motor) When it warms up you will be down about 100 RPM. Any more RPM than this & you can be jeopardizing the reliability.
    I got my tach in today so hopefully I can test it this weekend.

  10. #10
    powerstroke specialist mikegp's Avatar
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    I got my tach in today so hopefully I can test it this weekend.[/QUOTE]

    now you will have a starting point. when you get the correct rpm reading you will know if you have to do any prop work or not.
    don't worry about top speed until you get the rpms where they need to be 8300 /8400

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