KS P90 Upgrades

Discussion in 'Gun Building, Modifications & Repairs' started by BlueReaper46, Oct 14, 2012.

  1. BlueReaper46

    BlueReaper46 New Member

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    I am going to purchase this gun soon, and I want to upgrade it:
    http://shop.ehobbyasia.com/ks-p90-tr-airsoft-aeg.html

    The only thing is, I dont know what the best parts are, or what order to do it in.

    I plan on doing this DIY mods:
    Fine Tune Hop-Up
    Gearbox Air Seal

    The first thing I wanted to do was Upgrade/Downgrade the spring. I need it to shoot under 315 FPS with .25g, or under 350 FPS with .20g, so a weaker spring(Downgrade) but most likely of better quality(Upgrade).

    I also want to install an R-Hop. My goals for this build are a high RoF, somewhat decent range(This will be my CQC and field back up gun), and I would like to make it as quiet as possible.

    I do not know what parts to use, or what other DIY mods to use to achieve these goals, but you only learn by asking questions....

    If more info is needed Ill do what I can to supply it... I have no budget.
     
    Last edited: Oct 14, 2012
  2. Archer627

    Archer627 New Member

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    Figgington
    Well, first off, you aren't going to be able to get very good performance without a Lipo. Why do they scare you? They're just a different chemical makeup from Nicads.
     

  3. BlueReaper46

    BlueReaper46 New Member

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    I would just rather not set something on fire... or blow it up... Its not so much what they are, but what can happen to them.
     
  4. ThompsonFTW

    ThompsonFTW New Member

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    Dayton

    Attached Files:

  5. Archer627

    Archer627 New Member

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    Figgington
    A nicad can do just the same as a Lipo. All batteries are capable of starting on fire. It doesn't happen if you treat then right.
     
  6. BlueReaper46

    BlueReaper46 New Member

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    Is there any special wiring I need to do for it to use a LiPo?

    EDIT: Never mind, I found this answer myself.
     
    Last edited: Oct 14, 2012
  7. Archer627

    Archer627 New Member

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    Figgington
    I suggest using 16 AWG or 14 AWG if you can get it to fit. If you run a Lipo, I suggest you grab a MOSFET as well.
     
  8. BlueReaper46

    BlueReaper46 New Member

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    Where would you recommend getting that from?
    I have also read that Lonex is good for motors and ShS for gears, is this true? and if so what would be the best for this build?
     
  9. Archer627

    Archer627 New Member

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    Figgington
    Both of those is correct. I suggest SHS 13:1s with a Gen 1 bevel. If you can't get one with a gen 1 bevel, throw an XYT bevel in. A Lonex red(balanced) is your best be for a motor. Contact disguised enemy or legitdood on ASM for mosfets. Both make good ones.
     
  10. Lefse

    Lefse Well-Known Member Supporting Member

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    Do you have a more specific goal for the ROF? The motor and gear combo posted by archer will do low 40's with an M120 spring with a good 11.1v li-po.
     
  11. ThompsonFTW

    ThompsonFTW New Member

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  12. BlueReaper46

    BlueReaper46 New Member

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    Not yet, I just need it under 350 FPS with .20g BBs. But I read that if my spring isnt strong enough compared to the speed it wont push the piston forward fast enough and it will strip because the gears are already trying to pull it back.

    Thanks for the hivemind tip, dont have them bookmarked yet, so I didnt even think about it!

    EDIT: Do P90's gave V6 Gearboxes?
    Also will these fit, and are they some of the best I can get?
    Lonex V6/V7 Spring Guide

    For buckings, Is Madbull Blue one of the better ones? or is that only for a certain FPS range?
     
    Last edited: Oct 14, 2012
  13. BlueReaper46

    BlueReaper46 New Member

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  14. ThompsonFTW

    ThompsonFTW New Member

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    The KS spring guide is metal....
     
  15. TheAirsoftTech

    TheAirsoftTech New Member

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    You don't need a new cylinder head.
    You will want an o-ringed Airnozzle. Lonex, 4.50$
    A Lonex POM piston head will do, 15$.
     
  16. ThompsonFTW

    ThompsonFTW New Member

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    Element pom piston head is just as good and $4...
     
  17. TheAirsoftTech

    TheAirsoftTech New Member

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    Sorry, I'v never looked into that one.
     
  18. BlueReaper46

    BlueReaper46 New Member

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  19. ThompsonFTW

    ThompsonFTW New Member

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