RPI Modification - Page 2

Finnegan · 08-05-2012, 11:00 PM

Quote:

Originally Posted by Roffle Waffle

In that little free panel where people usually relocate their 12v outlets to. Hidden under the dash area (above the seat heaters and ashtray)

it comes with a switch you hold for 4-5 seconds for the flaps to fully open. You can stop it anywhere in between, but I'm gonna treat it as an on-off switch.

Should sound very interesting, since some air will still hit the stock mufflers

Beedub · 08-06-2012, 11:27 AM

going to install my DKF damped hangers to see if i can get rid of some of that horrific drone!!, hardtop has made it much better however... with the roof off, it sounds great, with the fabric roof up, its unbearable!! lol

dubsesd · 08-20-2012, 08:47 PM

And how did the hangers do? Did they help?

Z4MHawk · 08-24-2012, 08:09 AM

UPDATE:

I removed the perforated screens from the side of the main tube with a round grinding stone on the end of bit extender and air grinder. No change in the tone of the RPI exhaust at idle, but a significant tone change under throttle. There is also more rasp...so it would appear that the screens are used for deeper tone from the main tube and to control rasp.

I will get it out today and see what it sounds like in the dreaded 2500 to 3000 rpm range in 1st and second. I will also place a sound recorder in the cab and will post the audio clip.

08-06-2012, 11:27 AM	#24
Beedub Brigadier General Drives: 2007 Z4 M roadster vt2-500 Join Date: Sep 2007 Location: UK Posts: 3,057 iTrader: (0)	going to install my DKF damped hangers to see if i can get rid of some of that horrific drone!!, hardtop has made it much better however... with the roof off, it sounds great, with the fabric roof up, its unbearable!! lol __________________ Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.

08-20-2012, 08:47 PM	#25
dubsesd Lieutenant Colonel Drives: M coupe / 328xi LCI Join Date: Jul 2011 Location: ottawa Posts: 1,518 iTrader: (1)	And how did the hangers do? Did they help? __________________ 2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" Morr vs8.2 hand brushed/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting

08-24-2012, 08:09 AM	#26
Z4MHawk Private First Class Drives: '06 Z4 M Roadster Join Date: Feb 2009 Location: tulsa Posts: 159 iTrader: (0)	UPDATE: I removed the perforated screens from the side of the main tube with a round grinding stone on the end of bit extender and air grinder. No change in the tone of the RPI exhaust at idle, but a significant tone change under throttle. There is also more rasp...so it would appear that the screens are used for deeper tone from the main tube and to control rasp. I will get it out today and see what it sounds like in the dreaded 2500 to 3000 rpm range in 1st and second. I will also place a sound recorder in the cab and will post the audio clip. __________________ '06 Z4 ///M Roadster: Silver Gray Metallic; Gray soft top. Zeckhausen CDV. ESS VT1 445 Supercharger. APEX ARC8's. Dunlap Direzza Star Spec's. Strong Struts. Royal Purple. RPI Exhaust w/ DKF hangers.

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