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  1. #1
    Join Date
    Mar 2013
    Location
    boat conwy
    Posts
    3,180

    Default Turbo pressure ,

    So out at the weekend boat ran great ,but starboard engine was registering 10 more than port is this normal, was running just under 3000rpm , engines vp 370hp D6

  2. #2
    Join Date
    Oct 2016
    Posts
    305

    Default Re: Turbo pressure ,

    Please specify the figures. There is difference of 10 between "5 and 15" or "920 and 930" means totally different.

  3. #3
    Join Date
    Mar 2013
    Location
    boat conwy
    Posts
    3,180

    Default Re: Turbo pressure ,

    Quote Originally Posted by Eren View Post
    Please specify the figures. There is difference of 10 between "5 and 15" or "920 and 930" means totally different.
    one was running at 160 and the other 170 thanks for asking

  4. #4
    Join Date
    Jun 2006
    Posts
    1,145

    Default Re: Turbo pressure ,

    160psi? Are you sure? that's pretty high.

    Could it have been 16.0 psi?

  5. #5
    Join Date
    Mar 2013
    Location
    boat conwy
    Posts
    3,180

    Default Re: Turbo pressure ,

    Quote Originally Posted by julians View Post
    160psi? Are you sure? that's pretty high.

    Could it have been 16.0 psi?
    I think it said kpa boost pressure

  6. #6
    Join Date
    Jun 2006
    Posts
    1,145

    Default Re: Turbo pressure ,

    Ah OK, so 10kpa difference works out to be a out 1.5 psi difference, which in my opinion is no big deal

  7. #7
    Join Date
    Mar 2013
    Location
    boat conwy
    Posts
    3,180

    Default Re: Turbo pressure ,

    Quote Originally Posted by julians View Post
    Ah OK, so 10kpa difference works out to be a out 1.5 psi difference, which in my opinion is no big deal
    ok thanks

  8. #8
    Join Date
    Jan 2012
    Location
    South Coast
    Posts
    4,991

    Default Re: Turbo pressure ,

    Divide kPa by 100 to get the figure in Bar, so 160 = 1.6. So 0.1 Bar = 1.5 psi variation

    Slightly different prop speeds, light fouling, or slight differences in after cooler / air filter cleanliness could easily cause such differences and could cause such a difference in the effort from the engines. Some suggest balancing engines on Turbo pressures rather than revs.
    Interested in Corvettes PM me for details of the Corvette Motorboat Association

  9. #9
    Join Date
    Jun 2004
    Location
    Anglesey Wales
    Posts
    10,979

    Default Re: Turbo pressure ,

    Quote Originally Posted by superheat6k View Post
    Divide kPa by 100 to get the figure in Bar, so 160 = 1.6. So 0.1 Bar = 1.5 psi variation

    Slightly different prop speeds, light fouling, or slight differences in after cooler / air filter cleanliness could easily cause such differences and could cause such a difference in the effort from the engines. Some suggest balancing engines on Turbo pressures rather than revs.
    Could be cleanliness
    I have been on the boat when his wife ain’t there
    Just message our mate to remind him
    New cutlass bearing etc whilst ashore recently
    Did ‘spin’ it ashore before she was chucked in
    Tight as Bruce K’ wallet folks!
    But as it would be should be
    The shaft I mean!
    When chucked in we had no time/ tide to test the new fitment but ran Her up whilst wharped in gear just in case
    Oil levels etc as yer do
    You checked the gearbox level again Mate after yer trip?

  10. #10
    Join Date
    Oct 2016
    Posts
    305

    Default Re: Turbo pressure ,

    I also don't think that it is a major difference. I agree with the above that it may occur due to various reasons. It is OK to let some time pass and keep on checking it. As you can read the turbo pressures, I assume that you have diagnostic screens. It is good to take photos of them regularly at same engine speeds (i.e. always at 1600 amp) and keep these photos as future reference. Then you will know the "standards" of your engines and you can check and compare if there are any significant differences at the figures throughout the time.

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