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  1. #1
    Bartlesville OK syclonedriver's Avatar
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    1st impressions of riva FF & EFI

    I just got my Riva FF & EFI controller last night. I installed the EFI unit last night on almost a stock 08 GPR in prepration for more mods. It seems to have better throttle response on the trailer, with very slight adjustments to the low speed & pump shot. I have the day off tomorrow and may go do a little testing. My GPR seems to have a lean spot at about 5500 rpm, I hope to cure this. The FF should be called "The Big Blue Tube", this thing is BIG. (sorry about the italic I cann't figure out how to turn it off)


  2. #2
    Mik72e's Avatar
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    Honestly with a stock motor you just have gone backwards.

    For the money you just spent there are allot better mods you can do.

    Plenty of info on the site where to start.

    EFI is only need if you have reeds and timing

    FF only need if you porting and some ski still run the SS.

  3. #3
    txgp1300r's Avatar
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    in prepration for more mods I think he is going to mod it more.....

  4. #4
    Bartlesville OK syclonedriver's Avatar
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    TX

    Congtats. you read the entire post. You got it, I'm going to mod it more!

    Mike

    You got to have fuel for the fire. If you add air & not fuel you will burn a piston. I chose to add the EFI now so when I add more air flow I can just turn up the fueling.

    I like testing and I like to share what I have learned.

  5. #5
    Mik72e's Avatar
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    I got you plan to to more mods in the future but an EFI is not need in the early stages at all your money could of been spend else where for performance is what i am tryin to say.

  6. #6
    Bartlesville OK syclonedriver's Avatar
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    Ran it today.

    I did some testing today. It ran great. I played around with the EFI setting. It does not need any extra fuel up top ( i know this is common knowledge i just wanted to test it). I set the crossover at 6k rpm. I was hoping to tune out a flat spot at about 5.4k rpm, it didn't happen. It did run great,the best it ever has. The holeshot is great, so much better than before that next time I'm going to disconnect the EFI controller completely just to test it. The weather was alot cooler today so this may have been a factor & I just regaped the plugs. I'll do some more testing.
    BTW I have not installed the FF yet.
    I'm gona start a new thread with todays tests & the results.
    Last edited by syclonedriver; 09-05-2008 at 09:53 PM. Reason: it was needed

  7. #7
    philip_gpr's Avatar
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    When you install the FF you will see

    - loss of about 1 mph

    - ski becomes much noisier (especially around 3500 rpm)

    Sorry but to be honest I would recommend you not bother installing the FF. It is a hassle to install and in my mind it is a step backwards.

    There are all sorts of ideas documented in this thread below that you might try. Or you might look in the how to section of the forum.

    http://rivaforums.com/eve/forums?a=t...093#2571066093

  8. #8
    Bartlesville OK syclonedriver's Avatar
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    Phill

    Thanks for the link & the advice.

    I'm gona wait to install the FF, maybe untill I reinforce the pump tunnel.
    I realize I may not like the noise, but if the holeshot improves it maybe worth the loss of speed & extra noise.

    I'm not just after top speed. I want better handling & great holeshot. This is gona require more power, but I still have a warranty to deal with.

    It really ran geat yesterday peak rpm went from 7200 to 7270 & top speed went from 64.8 to 66.2. The holeshot was much much better.

    Thanks again.

  9. #9
    philip_gpr's Avatar
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    mods to help holeshot

    see my link above to get more air to the motor
    seal in pump shoe
    single bar intake grate (they don't break)
    Dynafly 14/20 impeller pitched at maybe 13/19
    or use Skat swirl 13/19 impeller (will be 1.5 mph slower but will have better holeshot)
    raise compression
    use aftermarket reeds

  10. #10
    yami_rida#26's Avatar
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    Quote Originally Posted by philip_gpr View Post
    mods to help holeshot

    see my link above to get more air to the motor
    seal in pump shoe
    single bar intake grate (they don't break)
    Dynafly 14/20 impeller pitched at maybe 13/19
    or use Skat swirl 13/19 impeller (will be 1.5 mph slower but will have better holeshot)
    raise compression
    use aftermarket reeds
    +1 and don't forget the Jetworks mod.

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