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Thread: How much boost?

  1. #1

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    How much boost?

    How much boost can these 4tech's take assuming the tune is good? I'm considering upgrading to a Rude 3 blower, riva computer and valve springs. Am I guaranteed a motor job soon to follow?

    Its that or wait for the winter and build another turbo ski.


  2. #2
    Orlando Shark's Avatar
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    As long as the tune is good you shouldn't have any problems with the 3 Rude.

  3. #3

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    What kind of real time numbers boost psi can I expect, right now Im seeing around 10.5-11 psi with the X, in 100 degree heat. When I get a little cooler air I have seen as much as 12psi.

  4. #4
    Orlando Shark's Avatar
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    This all depends on your RPM's That charger was designed(not 100% so correct me if I'm wrong) to boost 18 LBS at 9K+ RPMS, so i'd say at 8600 it should be at 15-16 LB and at 8100 it should be at 13-14 LBS. Somewhere around that ballpark figure.

  5. #5
    Moderator Insanediego Joe's Avatar
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    Quote Originally Posted by ImAShark View Post
    This all depends on your RPM's That charger was designed(not 100% so correct me if I'm wrong) to boost 18 LBS at 9K+ RPMS, so i'd say at 8600 it should be at 15-16 LB and at 8100 it should be at 13-14 LBS. Somewhere around that ballpark figure.
    your numbers are spot on

  6. #6

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    Do you guys think its worth stepping up to the bigger blower? Will I really see a major gain with 2.5-3psi? Last should I just upgrade the wheel in the X charger? If so which one. I would like to get to 80mph or more......

    Thanks

  7. #7
    Eastside Powersports Slow 91's Avatar
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    I went from a rude2 to a rude3 and was like OMG!. im seeing 15 fluttering to 16psi at 8450-8500 rpm. I have 10+ hours on this charger and had to shim it one time and now its settled at 19ft lbs.

  8. #8

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    Quote Originally Posted by Slow 91 View Post
    I went from a rude2 to a rude3 and was like OMG!. im seeing 15 fluttering to 16psi at 8450-8500 rpm. I have 10+ hours on this charger and had to shim it one time and now its settled at 19ft lbs.
    I bet that thing is nasty in a conversion ski

  9. #9
    Eastside Powersports Slow 91's Avatar
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    yes, the ski is violent. pulls VERY hard.

  10. #10

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    What are the typical speeds expected these bigger blowers?

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