Quote:
Originally Posted by DarkPira7e
We tried to help before, you have to find another tuner. This person is obviously just dumb, or doesn't want to tune your car. The wastegate spring cannot be too tight. Do they understand how wastegate duty cycle works?
It'd be neat if they could give you the map file so we can look at it and see what looks wrong.
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There is such a thing as a wastegate that has a spring design or tightness factor where it opens only once the pressure is reached, and there are other springs where the wastegate may crack open at a lower psi becore fully opening at the set psi. Ex: 10 psi spring opens at 10 psi; 10 psi spring cracks at 8 psi and fully opens at 10 psi; 10 psi spring cracks more progressively from 6 psi up to 10 psi.
In the above scenarios, the tight spring that holds its position until the last possible minute can be susceptible to boost spike. I don’t know if this is what the OP is experiencing, but it might be.
Over-boosting is either a boost creep issue, which is unlikely because this is an off-the-shelf kit. The other possibility is not having the vacuum lines hooked up correctly to the EBC. The other possibility is having a boost leak on the vacuum line. The other issue is setting up the EBC to force the wastegate closed until the last possible second, which is like having a stiff spring.
