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Thread: 3 rude problem

  1. #1

    3 rude problem

    Sorry guys for my previous post but do not think I'm CRAZY. This is my problem: before installing my new rough I used 3 137 +3 mm rotax racing my performances were 8500 rpm and an EGT of 870 ° c. and about 14.7 psi pressure, now I'm using three rude and my performances are: 8600 ° C and 770 rpm EGT around 14.7psi of pressure, why? 3 Rough should put more pressure with more pressure should also have a higher EGT is lower but very strange, I also use 3 rotax racing bearings, which could be the problem? my clutch works in 18/20 nm. Thanks to all and sorry for my previous post.


  2. #2

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    What is your rev limit set to?

  3. #3
    8650 rpm rotax racing ecu and running with 13/18 skat and nozle 80mm .

  4. #4
    Moderator Snoman's Avatar
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    Your slip is way to low for a 3 rude..you want to bump that up to 25/26 Nm.

  5. #5
    iron head's Avatar
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    Quote Originally Posted by samui View Post
    Sorry guys for my previous post but do not think I'm CRAZY. This is my problem: before installing my new rough I used 3 137 +3 mm rotax racing my performances were 8500 rpm and an EGT of 870 ° c. and about 14.7 psi pressure, now I'm using three rude and my performances are: 8600 ° C and 770 rpm EGT around 14.7psi of pressure, why? 3 Rough should put more pressure with more pressure should also have a higher EGT is lower but very strange, I also use 3 rotax racing bearings, which could be the problem? my clutch works in 18/20 nm. Thanks to all and sorry for my previous post.
    it' running rich bring your egt up to 890 celious

  6. #6
    Quote Originally Posted by Snoman View Post
    Your slip is way to low for a 3 rude..you want to bump that up to 25/26 Nm.
    I pull the clutch in my 25/26 nm? I think a lot would not want to break the axis compressore.Thanks

  7. #7
    Quote Originally Posted by iron head View Post
    it' running rich bring your egt up to 890 celious
    OK is possible,but I am using the same configuration that I used with the rotax 137 +3 mm and my EGT was 870 ° celsius, now with 3 rude having more air and less gasoline should not have low fuel no rich , correct? thanks

  8. #8
    Moderator Snoman's Avatar
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    Quote Originally Posted by samui View Post
    I pull the clutch in my 25/26 nm? I think a lot would not want to break the axis compressore.Thanks
    Thats not alot..thats were you want it to be..what you had it set at was to low....225 inch lbs is about were you want the 3 Rude with higher RPMs..You shouldnt have any problems with snapping the shaft...

  9. #9
    Hello Snoman, for you my problem is slip clutch? thanks

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