Does FI CBE have any drone or rasp?

'10Anamoly · 07-30-2010, 05:19 PM

If your drone is like mine, from 2200rpms to around 2700rpms, 28-30" pipes, one per site, should do the trick. Your drone frequency should be close to mine.

I used a mic to record the drone and then analyzed it with Audacity. Drone occurred at 125hz-ish. My pipes are 28" and its dead silent from 2300rpms to 2700rpms and no drone above or below.

Pics are in the intake/exhaust thread I posted about recently near the last posts.

LINK

Zsteve · 07-30-2010, 06:06 PM

Quote:

Originally Posted by '10Anamoly

If your drone is like mine, from 2200rpms to around 2700rpms, 28-30" pipes, one per site, should do the trick. Your drone frequency should be close to mine.

I used a mic to record the drone and then analyzed it with Audacity. Drone occurred at 125hz-ish. My pipes are 28" and its dead silent from 2300rpms to 2700rpms and no drone above or below.

Pics are in the intake/exhaust thread I posted about recently near the last posts.

LINK

do yo have any other resonators on your exhaust? I have the 12 inch ones with my FI. So would that change the freq? So you have your tubes not going the same direction as the mufflers?

'10Anamoly · 07-31-2010, 08:14 AM

I have OEM resonators and 4" Magnaflow race mufflers. The side branches go at 90 degree angles to the exhaust flow so the sound will travel down them effectively. As they are capped, there is no real exhaust flow through them.

07-30-2010, 05:19 PM	#1 (permalink)
'10Anamoly Track Member Join Date: May 2010 Location: GA Posts: 882 Drives: 2010 370Z BS M6 Rep Power: 16	If your drone is like mine, from 2200rpms to around 2700rpms, 28-30" pipes, one per site, should do the trick. Your drone frequency should be close to mine. I used a mic to record the drone and then analyzed it with Audacity. Drone occurred at 125hz-ish. My pipes are 28" and its dead silent from 2300rpms to 2700rpms and no drone above or below. Pics are in the intake/exhaust thread I posted about recently near the last posts. LINK __________________ 2013 Ford Mustang GT 374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd

07-31-2010, 08:14 AM	#3 (permalink)
'10Anamoly Track Member Join Date: May 2010 Location: GA Posts: 882 Drives: 2010 370Z BS M6 Rep Power: 16	I have OEM resonators and 4" Magnaflow race mufflers. The side branches go at 90 degree angles to the exhaust flow so the sound will travel down them effectively. As they are capped, there is no real exhaust flow through them. __________________ 2013 Ford Mustang GT 374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd

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