Adjust boost on GT25?

EEro_sennin24 Jun 2013, 13:12

Go get some dyno graphs, youll see your power fall down after 5500rpm on that small turbo at 1 bar

OObsession28 Jun 2013, 08:44

Lets say i am testing somthing that has been on my mind for a while, been running it like this for the last two months, monday did a straight thru exhoust, lag is just bout none existant....

Boost goes up to 1.2 bar at bout 4300rpm from 3rd and up. and yes, u can feel the power drop from 5700rpm....

3300sx28 Jun 2013, 18:27

Boost goes up to 1.2 bar at bout 4300rpm from 3rd and up. and yes, u can feel the power drop from 5700rpm

its not that the turbo wont do this.. its just that it wont do it for very long.. 😉

OObsession28 Jun 2013, 20:00

300sx wrote:

Boost goes up to 1.2 bar at bout 4300rpm from 3rd and up. and yes, u can feel the power drop from 5700rpm

its not that the turbo wont do this.. its just that it wont do it for very long.. 😉

Well aware, like i said, testing something....

3300sx29 Jun 2013, 08:30

Obsession wrote:

300sx wrote:

Boost goes up to 1.2 bar at bout 4300rpm from 3rd and up. and yes, u can feel the power drop from 5700rpm

its not that the turbo wont do this.. its just that it wont do it for very long.. 😉

Well aware, like i said, testing something....

ah ok, i get it.. just out of curiosity, if it does fail, put a few pics up.. i for one would find it interesting to know what first point of failure is, turbine or compressor..

EEro_sennin29 Jun 2013, 09:42

300sx wrote:

ah ok, i get it.. just out of curiosity, if it does fail, put a few pics up.. i for one would find it interesting to know what first point of failure is, turbine or compressor..

+1

OObsession29 Jun 2013, 13:07

HAhahahahaha....Will do, u can even come and study it....

On my old motor i ran that Skyline turbo from the RB25Neo2...The one with the ceramic compressor wheel at 1.2bar, used to boost creep to 1.3bar, and max was said to be 1bar before it would destroy the compressor wheel.....funny enough it destroyed the blades on the exhoust wheel and also after 9months....

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