MPx wrote:I don't see why anyone would have ported the wastegate (which is done to avoid boost creep) with a standard chip? Having said that, .75 boost seems too high for standard to me, I thought it was nearer .5, but one of those in the know will be along soon with the correct info no doubt.
I believe OEM boost is 0.65 bar, but the dash boost gauge is not the most accurate. It is affected greatly by poor electrical connections to/from the transducer & as under-bonnet conditions vary from car to car, I would expect boost gauge readings to do the same. I think of it as a guide only.
The ECU uses a different sensor which is more accurate & it will send this data to Elanscan.
Porting the wastegate is to balance a larger exhaust. Without doing this, the wastegate can't let enough air flow, so too much goes through the turbo, which causes boot to 'creep' to levels above which the ECU is trying to maintain. The ECU is programmed with an Overboost feature, which cuts power if boost reaches a certain level (0.96 bar I think) because damage may occur beyond this.
So I can see why you would port it with a standard chip, but there is also a reason not to:
When boost starts to creep, power increases. Overboost is more of an issue when you are pushing the engine hard at high rpm, like on a track & on colder days when the chargecooler is more effective. With normal road driving, you can enjoy more power without getting too close to Overboost. Target & Overboost levels are further apart with a standard chip than with an Everest, which makes it more possible for a driver to manage.
The OEM wastegate is the correct size until the owners (that's us) change airflow levels by fitting a bigger exhaust.
