bump

 

Tony, similar issue here. I have Berk HFC's hooked to your XYZ with resonator and VQ exhaust and the drone is deaffining! Same rpm range! Any suggestions?
Can the Helmholz resonator be added somewhere (anywhere) in the system?
Can I purchase the resonator and have it welded in somewhere in my system?

I ask because I'd hate to have to start almost all over again purchasing a new HFC setup and Shockwave )) system just to quiet down the drone.

Edit: I'll add that I had no drone with the XYZ resonated and VQ dual outlet exhaust until I added the Berk HFC's, sounded great until I hit the highway and started cruising! Now its so loud (IE: deeepp low drone!) it hurts to drive it below 2800 rpm!

BTW: Thanks with all your phone help with my MREV2 install and dyno problems I had a few months ago!!

Dave S from Madison, WI.

 

It seems drone can become a problem with the Berk HFC's, or at least with HFC's in general.

As far as hooking a resonator the sedan VQ axleback its hard to say what the results will be without actually trying it. What works in one configuration won't necessarily work on another configuration.

Options to try are:
1 MD HFC's
2 The V2 axleback.
3 or axle experimentation.

 

Tony, I have a coupe if that changes anything.

 

Something about that doesn't seem right. I've used the VQ with raw test pipes and it doesn't rasp or drone. Many others are using it with test pipes and have neither rasp or drone.

Even with with test pipes it should be about as quiet as stock.

PM'd

 

cant wait to hear the sound clip and maybe even dynos

 

Skip to about :45 seconds. Not the best video, but it'll give you an idea of how the exhaust sounds.

As for dynos, I gained 12 whp/13 torque from my gamma tdx setup. According to Tony, the addition of the hemholtz mufflers won't affect it's performance.

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cool, but the whole automatic shifting part is really making me grimace..

 

^ I'm always in manumatic mode, lol. Tony and I were testing the exhaust for droning, which happens mostly at 2-3k RPMs. So that's why I was shifting that early and not really stepping on it

 

+1
For that test we made a point of finding the worst case drone on the regular axleback section and then switching it out for the V2 and testing it again at the same RPM and at any other RPM to try and find a drone.

With the V2... there was no point at which it droned.

 

Shockwave V2 gonna be available soon?

 

Oh Yeah.

Today was another good day for exhaust development.

V2's are just about done and will be ready next week.
The test pipe production is started.
And a new FULL True Dual 3" exhaust for Turbo applications was prototyped.

 

Nice! Any pricing for them yet?

Oh, and is it worth it to go pick them up, or just have them shipped?

 

This is exhaust looks amazing. I Love the v-band clamps!

Why only do half v-band and half regular flange style. All v-band would have been boner town

 

couldn't do all v-band in case people want to buy the XYZ seperate.