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Thread: Bosch 50s

  1. #1
    dnielsen's Avatar
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    Bosch 50s

    Has anyone tested the Bosch 50s, or the generic looking 55s that Jerry has listed in the online store. I'm wondering if the Bosch 50s lockup like the Riva 50s at say 62-63 psi?


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    speedskixp's Avatar
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    Quote Originally Posted by dnielsen View Post
    Has anyone tested the Bosch 50s, or the generic looking 55s that Jerry has listed in the online store. I'm wondering if the Bosch 50s lockup like the Riva 50s at say 62-63 psi?
    The bosch do not lock but if going bosch instead of the riva's I suggest going with 48's as they will still fow more than the riva's at high pressure.

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    mongo's Avatar
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    I was wondering about that. My 50's were locking up and I put in a set of bosch 48's and thought it was odd that I needed less fuel for smaller injectors to get the same afr's.

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    Eric Ocman's Avatar
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    Quote Originally Posted by speedskixp View Post
    The bosch do not lock but if going bosch instead of the riva's I suggest going with 48's as they will still fow more than the riva's at high pressure.
    +1 they work perfect.

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    Codeman666's Avatar
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    So if you have a riva ecu and like a x charger or mini rude you can use the bosch 48's with the stock regulator instead of the riva 50's?

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    speedskixp's Avatar
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    Quote Originally Posted by Codeman666 View Post
    So if you have a riva ecu and like a x charger or mini rude you can use the bosch 48's with the stock regulator instead of the riva 50's?
    Nevr tried with stock reg and that set-up but can tell you it will be a little richer than the riva 50's.

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    Eric Ocman's Avatar
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    Quote Originally Posted by speedskixp View Post
    Nevr tried with stock reg and that set-up but can tell you it will be a little richer than the riva 50's.
    I ran my ski a bit with stock reg stock ecu and a rude 1 with them.

  8. #8
    speedskixp's Avatar
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    Quote Originally Posted by Ocman View Post
    I ran my ski a bit with stock reg stock ecu and a rude 1 with them.
    Did you happen to check A/F?

    Honestly, running stock pressure and no higher the riva injectors will work fine and idle a little cleaner than the bosch. The problem with the riva's start with idle pressure above 62ish.

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    Eric Ocman's Avatar
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    No I didn't. I can just theorize. I should have but was to anxious to put the 140r in.
    I do know that with the 48s and stock reg and riva ecu with the 140r that I hit 13s wot. That was when we stopped and put the rrfpr in.

  10. #10
    masta2000's Avatar
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    bosch 50# injectors with stock regulator and rotax racing ecu and ET140R Le is still way too much, i had to cut down the fuel at wot with the rude controller or else afr was in the 9s

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