Quote:
Originally Posted by RobertISaar
and high boost isn't required to see it.... unless you're using a VATN or otherwise gigantic A/R turbine housing, you will ALWAYS have more backpressure than you have positive manifold pressure. even 4PSI or manifold pressure means you'll see at least that between the exhaust port and the turbine housing, which will effect the amount of air going in and out of the cylinder.
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That's not true for a well designed turbo system on boost, but off boost it will be true.
Anyways, the point still holds of course, don't need big pressure to make a difference.