beachbuggy
Registered User
New 15psi is on it's way to Gaz as we speak, hopefully this will fix his issue.. Then I'll be able to see if there's an issue with the actuator or Gaz!
lol dan nowing my look both haNew 15psi is on it's way to Gaz as we speak, hopefully this will fix his issue.. Then I'll be able to see if there's an issue with the actuator or Gaz!
Thing is a bench tested 15psi is never going to be 15psi on the car due to pressures in the housing.
Either way more preload will solve it
I cant understand a word you said gaz - lol
at least your happy tho
if as Dan suggested earlier the wastegate flap / bush issue has occured, that could stop the WG from closing fully (penny washer off centre to the hole) and stop it from making more boost perhaps? Could explain the bizzare issues.
Gaz - slightly irresponsible advice - crank a ****load of pre-load onto it, just for a test, and see if it causes a rise in boost that way. It could be that it needs LOTS more, or it could be an issue with the WG shutting as I think dan mentioned as a possibility on the previous page.
I hope for your sake it's just a pre load issue still though.
preload FTW! but not too much of course.
one comment...
If this was a chinese copy turbo, and copy hotside they mostly have shorter actuator arms on them than std, so the factory lever ratio of 1:1 is not the case.... which will down rate the actuator.
one comment...
If this was a chinese copy turbo, and copy hotside they mostly have shorter actuator arms on them than std, so the factory lever ratio of 1:1 is not the case.... which will down rate the actuator..
My my only thought on this , is that in theory 15psi is 15psi and whether the arm is 1 or 4 cm long and the actuator wouldn't crack until it has 15psi. How far it opens when the arm is different lengths is another thing.. A shorter arm will open more for the same actuator travel..
However, the force on the waste gate penny from exhaust gas will have more opening effect the shorter the arm, so maybe the waste gate is still being blown open ..
i seem to to think that I lengthen the arm on this one anyway to the same as a stock one, maybe Gaz can take a picture of the arm..
Static testing yep, your spot on Dan. Apply pressure to the actuator at (x) psi for a given rated pressure it should start to move the arm at that pressure..
However......... as we know, these hybrids will be devloping back pressure in the hotside/manifold to the tune of some pressure ratio of 2:1>2.5:1 so the Force acting upon he penny/arm vs the actuator holding onto the other end of said "lever" is going to have a lever ratio.... which of course will effectively change the sprint clamp rate by the lever ratio... As std its pretty much 1:1, on the copies and CN ones, its not.. and this will and Does derate the actuator.
I have done a lot of testing these anomolies on hybrids these past few years...
I worked it out and posted the lever ratio calcs I did up, which correlated well with real world dyno testing on my fb page months ago now..
Pic below
View attachment 22781
next we went out for a drive with n75 unplugged and did some logs, rick thought it was in limp mode as n75 was unplugged so only ran 6psi, it was fluctuating from 10 psi down to 1 psi with foot down, god nose why.