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10-26-2009, 07:58 AM | #23 |
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Why? Thinking that Stock = Best is naive. Every mod you do will give you something and take away something else. Since you absolutely don't know what that valve does, the "lesson" you mention is an unsupported claim..
Incredible how the X6 users here are chickening out on doing simple mods to this incredible CUV. The X6 has a lot of performance potential beyond what BMW provided. Why the fear? |
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12-26-2009, 07:15 PM | #24 | |
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12-26-2009, 08:17 PM | #25 | |
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I went to a profession exhaust shop they thell me it can be done. Because I have the same problem as you but very marginal lost of the low end. Because I want the Turbo to kick in faster therefore I will need to fix back the 2 air valve. On the 50i it is attach right after the muffer on each side. There is 2 option: 1. I will be cutting the Hartge exhaust and fit in the orginal airvale. 2. Fit back the original 50i exhaust and fit the Hartge exhaust tip. Either way the airvalve is staying. Will run DINO test on both. To be frank I really like the sound of the Hartge exhaust when you start the engine but I am really annoy with the slight vibration on the gear and steering because of the very low note it create through out the ride. I would say it is not my kind of driving, I perfere a smooth ride. I had also done the ECU remapping by power chip. It is very good on the M/S gear.
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12-27-2009, 10:26 PM | #27 |
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It's the Power Chip. 300kw to 351kw. I choose power chip because it is Australia base.
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12-28-2009, 12:58 PM | #28 | |
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Anyways, in short, the better your exhaust flows, the better your performance will be in these engines but it'll also be loud. Thus, I think the best way to achieve a good performance, esp one that increases low end as well, would be to go with better flowing down pipes. These are available for the 1 and 3 series now but not for the X6 as of yet. If you're fine with the 2250-2500 rpm boost start range with the X6 right now, try replacing the middle resonator and rear muffler with better flowing ones. I'd go step by step though.. That is, start with the resonator and see if you like the sound increase. If so, replace rear muffler as well.. |
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12-29-2009, 03:14 AM | #29 |
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henry, just go with the supersprint - it's street legal and LTA approved, the tips look great, and the sound is nice and bassy, yet relatively civilized sounding. i've also done jb3, put in a K&N, done forged diverter valves, custom fabricated an air scoop, and lowered with H&R - these are excellent combinations that makes my x6 a silent killer (speed and aggression when you need it, unobnoxious)
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12-29-2009, 05:10 AM | #30 | |
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12-29-2009, 06:54 AM | #31 | |
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12-29-2009, 07:41 AM | #32 |
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I'll try posting some pix tomorrow - enjoying my lazy evening
no i believe the 50i tip is incompatible with the supersprint. my jb3 comes with the gauge that allows for on the fly map changes. the supersprint + jb3 + k&n allows for a very very torquey ride that hardly requires WOT at any time (and i'm on full auto, not even paddles). It emits a low, steady growl with much more bassy aggression most of the time. But when i get irritated with motoring jerkoffs and WOT it, it growls like an enzo, and all those traction control christmas lights start coming on - with a full load of 4 passengers, a battery double that of stock and tons of amps, and its a 35i. jb3 rocks |
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12-29-2009, 07:48 AM | #33 |
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Can you show me the double battery you install and those amp? I am also starting to install my car audio. Thanks
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12-29-2009, 08:06 AM | #34 | |
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I'm using audison amps, a line driver (can't rem the brand), and morel speakers. It's setup for stealth - beneath the boot floor. This is an old pix which my installer posted in another forum so there are many changes (like the rims) but it gives you an idea |
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12-29-2009, 09:01 AM | #36 |
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$1500 for just a rear muffler is a ripoff, whether it's Supersprint or supershit.. You can achieve the same/similar sound with same/similar quality by a simple $300-400 custom exhaust and keep your 50 tips as well.. That's the other thing I see in these forums: Just because your car is expensive & worth its price, you're thinking any aftermarket mod that is expensive is worth its price as well. It's not. The cost for supersprint to manufacture that muffler is around $200 range at most(unless if it's titanium). The rest is ripping you off and making you happy at the same time.. Just my .02..
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12-29-2009, 09:46 PM | #37 | |
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12-29-2009, 09:49 PM | #38 |
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Thank you bradder! Your car also look very "Swee" and "Tok Kong"
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12-30-2009, 01:46 AM | #39 | |
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12-30-2009, 04:02 AM | #40 | |
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If this was a US$40k honda civic, we'll prob go the custom exhaust route |
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12-30-2009, 09:46 AM | #41 | |||
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My previous SUV was an Infiniti FX35. It's in a different league in many terms from the X6 but it had a great handling and great sound (again, my taste). In terms of exhaust, a FULL cat-back, very high quality and great sounding Nismo exhaust was $700 installed.. Let me re-iterate: Y-pipe, mid pipe and rear muffler for half the price of the cheapest aftermarket rear muffler for the X6. What are the differences between the two? Absolutely nothing in terms of quality. I'd get one and mod it to fit the X6 right now if Nismo wasn't a single in, dual out muffler.. Quote:
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12-30-2009, 01:44 PM | #42 | |
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There are reports, but no hard facts that folks have experienced these issues when disconnecting the vacumn hose and plugging with a golf tee to prevent the valve from closing on 335's. 1. Overall exhaust noise increases 10%. 2. Iritating droning noise when on the highway. Noise is so bad, some folks actually hooked the valve up again. Some claim the car sounds like a ricer Honda. I suspect the valve closes somwhat on the highway to control exhaust drone. 3. Reports of reduced low end and high end torque. 4. Reports that the car/catalytic converters take longer to warm up and that the car pollutes more when cold. Could be an issue at smog inspection time. Again, nothing scientific here , other then BMW installed the valve for optimum performance and it appears that you lose some performance for a louder/noisier exhaust. My advice when it comes to exhausts, is to leave it alone, or replace the entire exhaust with a product engineered for your car. Swapping parts between models usually has issues.
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12-30-2009, 10:35 PM | #43 |
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If I knew that they are going to remove the valve I would not have do the change of the exhaust tip. My intention of just changing the exhaust tip is so that I do not mess with the stock setup of the X6 35i.
But now I am more confused, should I fix back the valve or leave it because for turbo engine it should not affect the low end torque. What should I do? I am thinking of trying out other options because it can get worse and I am not very good in this kind of stuff. Can someone here help me? Not thinking of remapping because it will void the warranty. |
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12-31-2009, 11:01 AM | #44 | |
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Leave it as it is right now (no valve) unless you're worried about warranty issues etc. The valve only helps mute the sound at the low end and open up at the high end.. Nothing more. |
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