some tests with bad results ¡¡

[Simons]

Never mind, misread some of your text yesterday, sorry.

However, it still is weird to me, that even if Simons theory is correct, the boost falls to exactly spring pressure.
It sounds like a boost cut in motronic much more than a such physical problem. Especially due to the fact that the boost falls sharply, not gradually.

Ok, don't worry, we are humans

I thought that it could be the waste becouse I had a problem before that with my waste, and Rocco had changed turbo, injectors, eproms, n75, knock sensors....and his AFR numbers it wasn't too bad... the only thing that he couldn't test was the waste and probably happenned something becouse the waste control the boost directly....the last step

Resume, my theory is that the exhaust presure come into the low chamber and compress the spring.

[prj]

Did that need any changes in the Motronic values?

Yeah, lower N75 duty cycle is required for target boost, so boost chip needs remapping.

Ok, don't worry, we are humans

I thought that it could be the waste becouse I had a problem before that with my waste, and Rocco had changed turbo, injectors, eproms, n75, knock sensors....and his AFR numbers it wasn't too bad... the only thing that he couldn't test was the waste and probably happenned something becouse the waste control the boost directly....the last step

Resume, my theory is that the exhaust presure come into the low chamber and compress the spring.

Yes, but in this case boost would fall off gradually, not cut. Rocco has cut.

[Simons]

Yes, but in this case boost would fall off gradually, not cut. Rocco has cut.

The boost fall off graduadually, fast but gradually...and the problem started when the n75 began to work, when it tried to open a little the waste's valve...and in this moment the exhaust pressure came into the low chamber increasing the pressure and openned quickly the valve.


The diference is that I saw like the waste couldn't keep the pressure after boost, not like a cut of boost as you saw.