Boost flactuates at high rpm

S

Scol

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#1
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#9880
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#1
Hi everyone,

I am currently tuning the car with an S280 turbo, and when increasing boost, I am experiencing oscillations above 6K rpm.

Wastegate duty cycle is not maxed out yet. Has anyone experienced this and what would be the cause please ?

Thank you

1753444075627.png

https://datazap.me/u/eas/run-high-boost?log=0&data=1-3

Mods as follows:
S280 Turbo with s280actuator
Ported manifold
3.5" decat and cat back exhaust
2.75" Crossover with ITG Intake
 


F

FiSt200

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#2
Might be late, but it is worth checking your spark plugs and coil packs. If they are worn, they can cause boost dips by misfiring when under pressure.
 


OP
S

Scol

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Thread Starter #3
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#9880
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Thread Starter #3
A very weak actuator spring was causing this. Changed to a different actuator and problem solved.
 


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