Quote:
Originally Posted by Diesel42
O'kay this turbo says it's wastegated. Does this mean that it has a cetrain amount of boost? As i've read, it seems popular opinion is to stick around 8-9lbs., not to exceed 12-14 for short periods. What is your view? I feel you've armed us with enough information to shop with some degree of scientific data. I can't tell you how many turbo places i've found on the net that have said,"well this one should do!" When i ask why they feel it would work i don't get any reasonable explaination other than i will be happy with it.
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Yes the wastegate sets the boost. What the wastegate is set to will depend on what it was originally fitted to, but 9psi comes up surprisingly often.
If the wastegate arm is threaded, then it can be adjusted to change the boost level. I cut the arm on mine and welded in an adjustable section which works very well.
My view is that boost in itself isn't a big problem for engines, the problem is the combination of boost, fuel and injection timing. A combination producing a big power increase with the timing retarded further won't stress the engine as much as the same power level produced from further advanced timing.
Basically it's a complex relationship in which you pay your money and take your chances.
Personally I wouldn't be taking a 3B (esp one with a lot of km) past about 10-12psi boost depending on how long the potential walk home is.