thx78

this explains the possibility of several maps with different boost levels

ok, I understand much better how we can control the boost and increase the number of psi before opening the wastegate

the boost controller allows you to adjust the opening of the wastegate (which only has one preset spring) I'm going to see how it acts on it

I studied the principle of wastegate to begin with. so if I understood correctly. the moment when the turbo "spool" is where the boost control begins. When the target level of "psi" is reached the wastegate opens to regulate the exhaust pressure passing through the turbo and thus control its speed and the rate of boost

I don't understand anything anymore.

so this is an anomaly??? I thought it was a voluntary increase

they choose the number of psi (27) around 4200? Could it produce more at this engine speed with the same turbo?

one thing escapes me, if the turbo spool provides the maximum boost and we can't control anything before that, how can the boost be higher by it alone. here around 27 psi at 4200 then up to 32 psi at 6500 rpm how does the tuner do this

to have this type of adjustment possible with a curve as I wish, what budget (engine) should be planned?

I am impressed with all this level of adjustment. I didn't expect all this possibility

so you can decrease or increase the boost depending on the diet as you wish? by acting on the wastegate?

so on the first graph the boost and the torque during spooling at 4000 are deliberately limited? and then there is a progressive increase in boost with the revs

therefore on the first examples, as we see, changing cams (graph 2) influences the quantity of torque at high revs its OK for me. so a tuner can act on the wastegate via the boost controller to increase the boost at high revs? on the last example, the boost does not decrease ok, but the torque does. this can come from cams etc etc ok. but on the other curves the boost is not constant, it increases, this is what I find strange to my mind. even more so if it comes from the relief valve. sorry I'm very new don't blame me. in my mind I couldn't imagine how the boost could be higher after the spool

most turbos look like this. spool, flat torque curve and drops. the boost rises to the target psi and remains fairly constant. like this graph. In what I presented above, the torque and boost increase after the spool. I'm asking what settings change this. that's all

don't want anything more or less, I don't really understand why the torque still goes up to 6000-6500, while the boost peak is around 4000. if it only comes from the cams or from the boost controller etc.