Quote:
Originally Posted by old motorhead
No....boost level isn't the limiting factor. Power level and tune is.
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I thought boost was the limiting factor as opposed to power level. I understand tune is everything.
But with stock internals and, with more boost, depending on the gas to be used and whether meth will be added, the tune needs to be programmed to compensate for the increased work load that the higher boost is creating.
In contrast to that scenario, if you add a more aggressive cam, headers, and maybe a more free-flowing exhaust, the boost will decrease a little bit but the power level will increase because of the increased efficiency of the engine. Here, the power level increase is actually good for the engine. (I think)
If, however, you wanted to get the same power level as the cam/header/exhaust car mentioned above, by merely rasing the boost, boost would be the limiting factor because the engine would be working harder to make that extra power.
As you said, tune is a limiting factor. But, I would think that the tune would really depend on the amount of boost. On a stock bottom end, the higher the boost, the lower the timing. (I think, please correct me if I'm wrong).
Perhaps boost is less of a limiting factor when IAT's are low and AFR is good throughout the powerband, but I would still think that increased power goals would be limited by boost when the engine's internals are not forged.