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  1. #26
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    You are correct, they are operating on the same principles. I went over this with unfor and asked him about using diesel injectors on his application but I forget what the reasoning was against it. I'll ask him to chime in.

    nice...i figure if a diesel can support fuel pressures of 23000 psi i think it wouldnt be a problem to support a Bosch injector pushing 3000psi.

    CP3 fuel pump on an BMW anyone? LOL

  2. #27
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    i think diesel injectors are not compatible with gasoline injectors, especially with DI. there have to be tolerances, viscosity and flow rates that differ between the different fuel types.
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  3. #28
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    Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge
    i think diesel injectors are not compatible with gasoline injectors, especially with DI. there have to be tolerances, viscosity and flow rates that differ between the different fuel types.
    yeah. I wasn't saying like lets use a diesel injector for the car, i figured maybe a company out there can tweak a bosch injector. They do all sorts of things like increase the number of holes in the pintle, as well as increasing the size of each one...so it would be like a 6x15 or 6x16 sized injector..meaning 6 orifices at .150" or .160" each.

    I know gasoline is a little more corrosive or the ethanol in it likes to eat up seals and what not....maybe thats what the cause that keeps them from coming out with an injector upgrade?

  4. #29
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    1 out of 1 members liked this post. Yes Reputation No
    Yea,

    It is very hard, if not impossible, to replace the DI injectors on this platform.

    The first and most obvious reason is the DME. Lets take something as simple as the fuel pump, for example. If you add a Walbrolo, the DME freaks out and puts the system into limp mode. This is based on fact Click here to enlarge The only way to add another fuel pump is to run an inline fuel pump.

    You can't even really mess with the injectors at all. Again, limp mode. Not based on fact, but based on reason. Also, there are certain parameters put into this DI system that make it very hard to simply "swap out" injectors. If that was the case, it would have already been done.

    The way my fuel system works (it works Click here to enlarge, more next week), is that it does not touch the DI side. Thats the only way to get additional fuel.

  5. #30
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    Ah I gotcha. I didn't know it was that picky.

    I'm psyched to see the results of your additional fueling.

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    Trust me Matt,
    All the options were looked out. the DME is a very picky and finicky system that can't handle too much fuel or it goes into limp. It sucks.
    As long as the DI side is left alone, secondary injection works fine.

  7. #32
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    Click here to enlarge Originally Posted by unfor Click here to enlarge
    Trust me Matt,
    All the options were looked out. the DME is a very picky and finicky system that can't handle too much fuel or it goes into limp. It sucks.
    As long as the DI side is left alone, secondary injection works fine.
    It's a shame. Cuse american manufacturers pretty much left the door wide open for any kind of DI modding. I'm sure their ECUs aren't as sophisticated as BMWs, as you really only use it for fueling...

  8. #33
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    True. It sucks, would have saved me some $ if it was a matter of just replacing injectors.
    Sigh.

  9. #34
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    so what are the max for the stock injectors humans have seen?
    Click here to enlargeClick here to enlarge

  10. #35
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    Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
    so what are the max for the stock injectors humans have seen?
    Seems the mid 500's level is reaching the limit.

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  11. #36
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    Yea, but thats with meth as a fuel supplement.

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