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  1. #1

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    Sep 2006
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    San Juan, Puerto Rico, Puerto Rico
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    pump 8 vein msx 140

    Hello: Installs magnum pump 8 vein with nu jet 7,0 and intake Grate RD I could have a better starting but after the 30 under torque and lowered the RPM to 6450 and speed to 61 to 62 miles before with 6 pump vein and original impeller the speed was of 65 to 6650 RPM that recommendation can give me


  2. #2
    SeaLion's Avatar
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    Ride Mohave To Havasu. Live In Los Angeles.
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    I wouldn't put an 8 vein on a stocker. That coupled with the R&D top loader definitely explains your loss of rpm and speed. I bet it runs better in rough water though. I still think an 8 vein is not necessary unless extra power is added.

  3. #3
    ph2ocraft's Avatar
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    Well since you have already installed the 8 vein and you need more power why not install some MATRIX base gaskets and get the ports raised. Then run it again and see what your MAX RPM's are. Send the impeller to Impros or Chris Bush and get that sucker tweaked for proper RPM's. Be careful keeping the RPM's where you're currently running as you don't want to LOAD the Domestic engine.

    My pennies worth........

  4. #4

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    Sep 2006
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    San Juan, Puerto Rico, Puerto Rico
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    Ok my speed with pump 6 vein to impeller original was of 65 miles to 6650 RPM indicates gauge of the jet ski, became a speed trials with radar and I indicate 54 to 6650 RPM, impros I recommend Magnum pump 8 vein with the Impeller Nu jet 7.0, I to have one better exit, and when proving the jet ski gauge I indicate a speed of 61 to 62 miles to 6450 RPM, understand that I have less RPM and less speed in Puerto Rico is run in rough to water, the exit I improve something but on the 30 feet that towing traction force is lost and it feels because it loses force I go to impeller to originate to see as is torque of nu jet the 7.0 and nu jet to originate to impeller that it brought the jet ski, I to write to him to impros to see that they recommend to me

  5. #5
    SeaLion's Avatar
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    Ride Mohave To Havasu. Live In Los Angeles.
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    You can also bore the exit nozzle 2 to 3 mm. Probably easier and quicker than repitching the impeller. If you run alot of rough water then the 8 vein is the way to go?

  6. #6

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    I do not speak English but I communicate with a translator of Spanish to English but they are possible to be contacted to phone 787 4220975 with jimmy [email protected]

  7. #7

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    Sep 2006
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    San Juan, Puerto Rico, Puerto Rico
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    127
    I'll to reinstall the original pump 6 veins with a propeller Polaris PWC Impeller 1999 Genesis # 5132222, which according to the information I have I officer better I hope inform me if I am correct, and also may For sale the magnum pump 8

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