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  1. #1

    Need more fuel. Pump it injectors?

    Got my ski up and running and got it running perfect up until 8200rpms. Starts to lean out to 12.4 and higher up to around 12.8 and I let off. So injectors it fuel pump next? Running e tech 15.5 wheel, type 9 intercooler and Rd watercooled sc housing. Recently reflashed to r3.

    Baseline fuel pressure is 48psi(rising rate hooked up) Increasing pressure makes no difference in AFR. Haven't had the balls to read the gauge at WOT yet. Also lean at idle, checking for vacuum leaks today, already checked rising rate lines.

    If the weather is got (30+Celsius) I have no issues as I won't build enough rpm to have problems. Seeing 15-16 pounds at 8400 in cooler conditions. Just under 15 when warm.


  2. #2
    Yellow93's Avatar
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    Stock injectors? You need injectors with that setup.

  3. #3
    isa alnoaimi's Avatar
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    you need to change your fuel pump , stock injectors no need to change them they will Handel till 8700 rpm

  4. #4
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    you need injectors a stock fuel pump can handle up to a H1 wheel. You may ask how do i know i have build over 10 ski's with H1 wheels including all of mine that are turning 9200 to 9500 rpm and one with a 1.9 liter and all have stock fuel pumps.

  5. #5
    isa alnoaimi's Avatar
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    hello jim

    what injectors for H1 wheel with R3 reflash ?

    one of your customers is running the 565cc with r3 reflash , how is that possible ?
    i mean the R3 reflash is mapped for stock injectors

  6. #6
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    Quote Originally Posted by isa alnoaimi View Post
    hello jim

    what injectors for H1 wheel with R3 reflash ?

    one of your customers is running the 565cc with r3 reflash , how is that possible ?
    i mean the R3 reflash is mapped for stock injectors
    the injectors i run are rated at 680cc at 40 psi. and 900cc at 75 psi. on all my H1 setups and all have R2 or R3 reflashes. Been doing that for years, I have had the H1 wheels on my ski's for years now since the H1 wheel came out.

  7. #7
    isa alnoaimi's Avatar
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    Quote Originally Posted by JIM'S PERFORMANCE View Post
    Quote Originally Posted by isa alnoaimi View Post
    hello jim

    what injectors for H1 wheel with R3 reflash ?

    one of your customers is running the 565cc with r3 reflash , how is that possible ?
    i mean the R3 reflash is mapped for stock injectors
    the injectors i run are rated at 680cc at 40 psi. and 900cc at 75 psi. on all my H1 setups and all have R2 or R3 reflashes. Been doing that for years, I have had the H1 wheels on my ski's for years now since the H1 wheel came out.
    you mean the 565cc is good to run them with R3 and H1 ?

  8. #8
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    Quote Originally Posted by isa alnoaimi View Post
    Quote Originally Posted by JIM'S PERFORMANCE View Post
    Quote Originally Posted by isa alnoaimi View Post
    hello jim

    what injectors for H1 wheel with R3 reflash ?

    one of your customers is running the 565cc with r3 reflash , how is that possible ?
    i mean the R3 reflash is mapped for stock injectors
    the injectors i run are rated at 680cc at 40 psi. and 900cc at 75 psi. on all my H1 setups and all have R2 or R3 reflashes. Been doing that for years, I have had the H1 wheels on my ski's for years now since the H1 wheel came out.
    you mean the 565cc is good to run them with R3 and H1 ?
    565cc is to small for a H1 read my post i stated what injectors i us for the H1 wheels.

  9. #9
    isa alnoaimi's Avatar
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    oh sorry

    you mean 680cc injectors ? where i can find them ?
    i searched jerry store but i didnt find them
    also what i understood is that i can run bigger injectors with R3 even its flashed for stock injectors
    am i right on this ?

  10. #10
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    Quote Originally Posted by isa alnoaimi View Post
    oh sorry

    you mean 680cc injectors ? where i can find them ?
    i searched jerry store but i didnt find them
    also what i understood is that i can run bigger injectors with R3 even its flashed for stock injectors
    am i right on this ?
    R3 is a R3 the only thing i have changed on it is the rev limiter.

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