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I've got a 2.5 exhaust and open air intake with the amm screens removed on my 85 900 turbo and the spooling is loudest just as the needle crosses the "boost threshold". I think its because as the boost increases the spooling is so high pitched it's not as noticable. But when I give it a simple shot of gas coming out of a parking lot the thing sounds like a tractor trailer :D Very cool.
posted by 142.177.108...
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