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      01-09-2013, 07:06 AM   #1
sharkatron
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Whistling

Hey there peeps,

Feeling quite good after an aftermarket FMIC install, I decided to take it to town. Open road, late at night, no cars, and no cops. Had my p3 vent measuring 0-100 times, and felt pretty good about a 5.06 time, stock car.

Anyways, I've started to notice a slight whistling noise when under load. It's not loud, but you can hear it. I'm not sure whether this is the normal sound of the turbos spooling, or whether I have a leak after doing the FMIC install. I've never noticed it before. Car is not throwing any codes, and with a time of 5.06, I don't think it's affecting performance. But still, could be something, right? I know I should have recorded it, but it's pretty faint in the cabin, and not sure whether it would be picked up by my iphone recording. Anyway, what do you guys think?
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      01-09-2013, 03:56 PM   #2
Ian///M
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What does the max boost read on th P3? Is the P3 boost tap line leaking?

Why did you install a FMIC if you don have a tune, as stock FMIC would suffice?
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      01-09-2013, 10:38 PM   #3
sharkatron
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Quote:
Originally Posted by Ian///M View Post
What does the max boost read on th P3? Is the P3 boost tap line leaking?

Why did you install a FMIC if you don have a tune, as stock FMIC would suffice?
Ian, the max boost reads 8.3, and vacuum idle is 19.5-20.5. However, for some reason today, the whistling doesn't seem as noticeable. Whether or not it's the couplings seating themselves, but yeah, better today.

Tune is just around the corner - in fact, looking at EvolveR. Just getting the labour out of the way first.

Might need to buy you a beer sometime - thanks for all the help!
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      01-10-2013, 05:20 AM   #4
BMW86
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Seems normal
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      01-10-2013, 06:39 PM   #5
sharkatron
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Just thinking about boost levels, and if there is a leak, how much of a leak is needed before a CEL is thrown? If it's pin sized, there won't be much, but obviously if it's a few mm, then yeah, a large drop will be experienced. But is it thrown if there is a leak, no matter how small? Is it that sensitive?

And if I am losing boost pressure, is the ECU going to make the turbos work harder to reach target boost?
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