codemanstang
Well-Known Member
Thanks for response manDid the frequency go up and down as you sped up and down? It should.
What is your gear ratio? Manual? Auto?
In my Manual GT with stock 3.31 gears and stock size tires at 110Kph (68Mph), the driveshaft turns at a CALCULATED speed of 47 times per second. (47 Hz) So my iPad hearing a very loud sound at 48Hz was close enough to know that they were a match.
In MY car 75 Mph would have given a sound of about 52Hz.
Do you have the auto with the 3.15 diff? That would explain why your frequency is different than mine. Of course, the phones/iPads could be a little off as well.
Sure looks like you are hearing the same thing I did.
Mine has been perfectly quiet since I did the DS balance last year.
Blake
Its auto with 3.15... At about 65 that frequency goes away, and it bounces around the 45-50mhz range. But its not as loud as that screen shot was. If i let the car sit IDLE i will see that same mhz as the peak audio frequency (though not as loud).
RPM dosnt make a difference, its dependent on speed only from what i notice.
I do have an H pipe (stock mufflers) and I only noticed this a few days after the H pipe was installed (unresonated) . I wonder if this could haven an effect?
Otherwise im Ford Racing stage 2 (tune / intake/throttle body) I wonder if the dealer would tell me to kick rocks on my warranty even though it was a CPO with 100k powertrain.
Ill have the car on all 4 jacks this weekend to paint the brake calipers. Ill check the exhaust for loose or anything else i should check for? i wonder if my exhaust goes at 47 and DS at 48 if it will give that womp womp womp noise. Sht idk lol
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