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  1. #1
    Vern's Avatar
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    X charger in 185hp GTX?

    I have a friend with a good running 2004 185 hp GTX and he is considering putting in an X charger (and swapping the gear), but changing nothing else, stock exhaust, stock air intake, stock injectors, etc. I am not as familiar with the 185 hp setup, injector size, etc. Would it be safe on fueling with an X charger on the otherwise stock 185hp setup? Any idea on the increase in rpms/speed if anyone has done this?


  2. #2
    i put the x charger and 215 gear drive ecu and 42 lb inj on my 03 gtx but i also put a set of 215 pistions in

  3. #3
    West Texas RXP skoepp's Avatar
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    The 185 dosent have an intercooler, I don't think.
    If not, then that could be an issue with intake air temp.

    If I'm wrong on IC then someone correct me.

  4. #4
    Vern's Avatar
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    You are right, no intercooler ...

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    jpeconsult's Avatar
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    Will need a 58 pound fuel pressure regulator too...and not sure how the prop would be affected. I'm not sure the 13/20 can be bent that much, so MAY require the RXT driveline/prop combo.

    You are correct Steven.

    Holler at Ray (Sundance)...I think he is running the hell out of his 185 WITHOUT an IC. I'm not sure what SC he is running though.

  6. #6

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    I think an intake mod is def something that needs to be addressed as well. I have an 06 rxp with 42lb injectors and an x charger and stage1 kit. my riva intake has somewhat colapsed from all of the air being sucked in.

  7. #7
    Vern's Avatar
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    What I am wondering whether the fueling on the 185hp ski will support just the X charger, with no other mods at all ...

  8. #8
    jpeconsult's Avatar
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    Quote Originally Posted by Vern View Post
    What I am wondering whether the fueling on the 185hp ski will support just the X charger, with no other mods at all ...
    I had to upgrade to the oem 215 fuel pressure regulator when I went from 185 to 215, but I swapped flywheel and pistons to OEM 215 specs. I have a spare 215 available.

    Anyone know what boost the X SC makes at 7600 RPM? This will determin what you need.

    Holler at Sundance.

  9. #9
    Vern's Avatar
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    Quote Originally Posted by jpeconsult View Post
    I had to upgrade to the oem 215 fuel pressure regulator when I went from 185 to 215, but I swapped flywheel and pistons to OEM 215 specs. I have a spare 215 available.

    Anyone know what boost the X SC makes at 7600 RPM? This will determin what you need.

    Holler at Sundance.
    Thank you, that helps. I know the ECUs are different, did not realize the fuel pressure regulators are different too. The injectors are the same per fiche, and I know a lot of internal engine parts are different, pistons, flywheel, etc. Do you know the fuel pressure difference? How much is a 215 fuel pressure regulator? Do you pull the entire fuel pump to change the regulator, or?

  10. #10
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by Vern View Post
    Thank you, that helps. I know the ECUs are different, did not realize the fuel pressure regulators are different too. The injectors are the same per fiche, and I know a lot of internal engine parts are different, pistons, flywheel, etc. Do you know the fuel pressure difference? How much is a 215 fuel pressure regulator? Do you pull the entire fuel pump to change the regulator, or?
    Note sure on 185, but 215 is 58 psi.

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