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Thread: 4.0 to 5.6 Swap

  1. #1

    Default 4.0 to 5.6 Swap

    Hey guys....Thinking about switching my 4.0gpm pump out for the 5.6gpm on a pressure pro GX390 13 horse Honda 4200psi. I've researched the swap a bunch and have found I can successfully make the upgrade and run at about 2500 psi and 5.6 gpm. My question is for this unit is the loss of psi worth the gpm? I do use this machine primarily for house washes, but also sometimes for surface cleaning. I know the gpm is where the power is, I'm just concerned about dropping the psi so drastically on concrete. What you think?

    Sent from my SM-S978L using Tapatalk
    Brian Custer
    JaxWash Pressure Washing
    904-451-6509
    Jacksonville, FL.

    www.jaxwash.com



  • #2

    Default Re: 4.0 to 5.6 Swap

    It will do just fine. I did the same thing your about to do. On difficult stuff as concrete just pre treat if you arent already.
    Moua Her
    MH Pressure Washing LLC
    470-429-7261

  • #3

    Default Re: 4.0 to 5.6 Swap

    As long as you keep the SC to no larger than 19" you should be fine.


    Sent from my iPhone using Tapatalk

    Doug Rucker-Owner/Operator
    Certified NCE Instructor
    We own and operate a School for Pressure Washing, Roof Cleaning, and Soft Washing http://www.pressurecleaningschool.com
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  • #4

    Default 4.0 to 5.6 Swap

    Get rid of the gun on the sc and go to a ball valve. Big difference.


    Sent from my iPhone using UAMCC mobile app

  • #5

    Default Re: 4.0 to 5.6 Swap

    The only thing you need pressure on is concrete and paver brick. The extra gpm is worth it. If you don't have an xjet, get one. If you have a problem with a nasty driveway, you can use a stronger mix to offset the lack of pressure. I run 10 gpm @ 3000, but at the end of 200 feet of hose, the pressure is down to about 2000 and I can clean any driveway I come across.

  • #6

    Default Re: 4.0 to 5.6 Swap

    Thank you guys for all of the info! Made my decision a lot easier. Thanks again!

    Sent from my SM-S978L using Tapatalk
    Brian Custer
    JaxWash Pressure Washing
    904-451-6509
    Jacksonville, FL.

    www.jaxwash.com



  • #7

    Default Re: 4.0 to 5.6 Swap

    Quote Originally Posted by Doug Rucker View Post
    As long as you keep the SC to no larger than 19" you should be fine.


    Sent from my iPhone using Tapatalk
    I know the whisper wash is top dawg, but would an 18" give a better result in this situation? I need to buy a new SC either way. Thanks again.

    Sent from my SM-S978L using Tapatalk
    Brian Custer
    JaxWash Pressure Washing
    904-451-6509
    Jacksonville, FL.

    www.jaxwash.com



  • #8

    Default Re: 4.0 to 5.6 Swap

    Quote Originally Posted by Brian Custer View Post
    I know the whisper wash is top dawg, but would an 18" give a better result in this situation? I need to buy a new SC either way. Thanks again.

    Sent from my SM-S978L using Tapatalk
    Get a classic. If you measure the classic bar from tip to tip it is 16", and you get a 18+ cleaning path. I ran a classic with that machine just fine. The proper tip size is a #7. But for some reason they send you a 6.5 with the unit. So you would use two 25035's on the classic. Once you figure it out, maybe even go to a 4 nozzle bar with 4 #2's on the bar. That will give you 1800 psi with a 100 feet of hose.

  • #9

    Default Re: 4.0 to 5.6 Swap

    Quote Originally Posted by Ralph Quaglia View Post
    Get a classic. If you measure the classic bar from tip to tip it is 16", and you get a 18+ cleaning path. I ran a classic with that machine just fine. The proper tip size is a #7. But for some reason they send you a 6.5 with the unit. So you would use two 25035's on the classic. Once you figure it out, maybe even go to a 4 nozzle bar with 4 #2's on the bar. That will give you 1800 psi with a 100 feet of hose.
    Tip size was my next question with the gpm/psi change. Thank you for the info!

    Sent from my SM-S978L using Tapatalk
    Brian Custer
    JaxWash Pressure Washing
    904-451-6509
    Jacksonville, FL.

    www.jaxwash.com



  • #10

    Default Re: 4.0 to 5.6 Swap

    Quote Originally Posted by Brian Custer View Post
    Tip size was my next question with the gpm/psi change. Thank you for the info!

    Sent from my SM-S978L using Tapatalk
    Did you ever get the Classic?

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