SC Bypass valve rattle - LotusTalk

FIL · 09-04-2009, 08:49 PM

Has anybody experienced the bypass valve buzzing/rattling when it opens and closes? Mine doesn't open and close quietly. The switchover happens at about 2800 rpms and the buzzing is really annoying.

Mr. Know · 09-04-2009, 08:58 PM

I hear mine coming off the throttle when cruising...but I wouldn't say its buzzy or annoying. Not sure if the BWR and Lotus setups use the same bypass though...

FIL · 09-04-2009, 09:21 PM

It's not particularly loud. I may just be a bit paranoid. But I can definitely hear it buzz right when it opens.

stinkyonion · 09-05-2009, 06:55 AM

I never hear anything but the supercharger whirr.

steve-elise · 09-17-2009, 12:54 AM

Do any of you guys with BWR superchargers have any 'rattle' type noise at high rpm ie >6500rpm almost sounds like hailstones hitting metal?

Cheers
Steve

09-04-2009, 08:49 PM	#1 (permalink)
FIL Serial Thrilla Join Date: Jun 2006 Posts: 236	SC Bypass valve rattle Has anybody experienced the bypass valve buzzing/rattling when it opens and closes? Mine doesn't open and close quietly. The switchover happens at about 2800 rpms and the buzzing is really annoying. __________________ 05' Elise - BWR supercharger, Quaife LSD, Nitron Race Triple Adjustable, LETSLA, Larini Decat, Larini Exhuast, ACT HDSS, Fidanza flywheel, V2 Fuel Tank, V2 Steering Arms, BWR sway bar, desnorkled, ForcedFed CF splitter, Manly's engine mounts, S111 harness bar, Schroth harness w/ S111 seat grommets, Oil Drain Valve, Painted Black Diffuser, Braille battery, Custom Battery Switch 05' Corvette - Z51 Convertible - 630hp 6.6L [DON'T YOU JUDGE ME!!!] (SOLD!)

09-04-2009, 08:58 PM	#2 (permalink)
Mr. Know British by extrapolation Join Date: Jun 2007 Location: Marin, California Posts: 3,350 Images: 6	I hear mine coming off the throttle when cruising...but I wouldn't say its buzzy or annoying. Not sure if the BWR and Lotus setups use the same bypass though... __________________ 07 Magnetic Blue Exige S Join the Blue Lotus Team on Facebook.

09-04-2009, 09:21 PM	#3 (permalink)
FIL Serial Thrilla Join Date: Jun 2006 Posts: 236	It's not particularly loud. I may just be a bit paranoid. But I can definitely hear it buzz right when it opens. __________________ 05' Elise - BWR supercharger, Quaife LSD, Nitron Race Triple Adjustable, LETSLA, Larini Decat, Larini Exhuast, ACT HDSS, Fidanza flywheel, V2 Fuel Tank, V2 Steering Arms, BWR sway bar, desnorkled, ForcedFed CF splitter, Manly's engine mounts, S111 harness bar, Schroth harness w/ S111 seat grommets, Oil Drain Valve, Painted Black Diffuser, Braille battery, Custom Battery Switch 05' Corvette - Z51 Convertible - 630hp 6.6L [DON'T YOU JUDGE ME!!!] (SOLD!)

09-05-2009, 06:55 AM	#4 (permalink)
stinkyonion Registered User Join Date: Aug 2008 Location: Oak Brook, IL Posts: 243 Images: 2	I never hear anything but the supercharger whirr. __________________ 2006 polar blue Elise, VF stage II, clam hinge, von Hep exhaust, HID, Zeitronix/Dashdaq (GPS, wideband O2, EGT, fuel+oil pressure), BWR fuel rail, moroso oil pan, HD SS clutch, RTV brace, green wire mod, harnesses, Oddysey 625, alpine pdx-5, jvc avx77 head unit, jl speakers, voltmeter on dash, custom gauge pod, etc.

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09-17-2009, 12:54 AM	#5 (permalink)
steve-elise Registered User Join Date: Jul 2009 Posts: 39	Do any of you guys with BWR superchargers have any 'rattle' type noise at high rpm ie >6500rpm almost sounds like hailstones hitting metal? Cheers Steve

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