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drmatera drmatera is offline
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Join Date: Aug 2009
Location: Nicholson, Ga
Posts: 2,160
boost creep is something different.

Boost creep is when the boost gets to the wastegate setting then as RPM increases so does the boost as more exhaust volume is being generated and the gate can not "vent" off enough exhaust to keep up.

Target vs actual is what we are talking about. What causes this differential is the fact that there are an infinite number of engine/turbo combos that have differing pressure ratios due to exhaust housing and wheel size. So when a wastegate advertises a "boost pressure target" it is an estimation. Your results will vary.

Saying the wastegate routing on these headers is "why" he is seeing more boost is wrong. Or at least not entirely correct because I have no trouble setting my boost controller to pull boost down as RPM goes up. That would not be easily done of "boost creep" was present.
Old 07-20-2011, 10:30 AM
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