01-16-2010, 08:12 AM | #1 |
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Exhaust mods in FI engines, backpressure, etc..
I've read some comments here talking about losing torque/power when the golf tee mod is done or the flap at the end is removed when using 50 exhaust tips. I posted some stuff on this but I think it's time to give some more detailed info. Here we go:
Torque - exhaust flow relationship on Naturally Aspirated Engines (not our engines):
On Force Induced Engines (Turbos mainly):
On our FI engines:
This forum needs sections, stickies and better moderation. The X6 is a very capable CUV. It will response very well to mods and there are very good aftermarket companies that serve the 3 series community now. I understand that many here think modding = ricing = losing prestige. That's not true. You don't have to "rice up" or "soup up" your X6. Even adding some springs, replacing resonator and adding an intake will keep it prestigious still and make it sound and perform much better. If the reason you got your X6 is because it's a sporty SUV that is NOT meant to carry people around and that you like this fact, you can make it slightly more sportier. In my honest opinion, it's a high riding, large CUV in its stock status that handles corners well but doesn't feel like it. It goes fast but it doesn't get you excited about it. Just my .02 Final note on voiding warranty: You have a legal right to ask the dealership to prove that a mod caused the problem. Say if you have aftermarket wheels and have vibration problems, they won't touch it and with good reason. Go to the place you got the wheels from and to the tire shop that mounted/balanced them. A dealership can NOT blame the aftermarket wheels for a problem in brakes. Same goes with other stuff as well. Ege |
01-16-2010, 08:26 AM | #2 |
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eg3,
A couple of months ago I talked to the gent, see below link, who runs AR Designs. He was looking for a X6 to develop down pipes for. I think he mentioned 3" diameter. No one makes them but there are a couple of companies out there that make them for 335i's. They would be free but the car has to spend 5 days in Denver to get it done. I'm on East coast. I'd hoped to be able to help but it would be a 9 day trip for me. Perhaps there's someone closer? http://www.ardesign.info/ |
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01-16-2010, 08:37 AM | #3 |
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If someone really wants to get some HP wack off your catalytic converters and put in a Riss Racing Oxygen simulator in your ECU. I did it with a 328i and gained 14HP, it was dynoed before and after. You'll void your waranty but I guarantee you'll also get an increase in sound. FYI, Riss does not make an oxygen simulator for the 328i, no one does. You'll get a light you'll never be able to extinguish if you try it in that car. Conversely, if you could see the guts of a Cat you wonder how the engines run at all.
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01-16-2010, 10:22 AM | #4 |
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looking to replace exhaust tips and increase growl
picked up a '10 X6 35i with perf. package. I really don't like the exhaust tips. what the best way to give dual pipe look and most imp increase the exhaust sound, to a deeper growl. your article was great. I need specific names of product for South Florida region.
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01-16-2010, 10:22 AM | #5 | |
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Quote:
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01-16-2010, 11:17 AM | #6 | |
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Also, take a look at other threads. You'll see the Dinan product and Skywagon here has the Supersprint. It's best to keep this thread a "technical" one.. There are other threads for product info. |
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01-16-2010, 12:35 PM | #7 |
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For what it's worth, the Supersprint system does not require any cutting of the bumper to install their plumbing through the bumper including the tips. The tip it's self is a large oval shape, at least for the 3.5. Anyone that want's a picture please PM me with your e-mail address. Some day soon I'll break the code on how to post a picture here.
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01-16-2010, 01:08 PM | #8 | |
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01-26-2010, 06:08 PM | #10 |
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I'm not experienced with the diesel engines but I'd think it would since a freer flowing exhaust would increase the engine noise, thus the diesel rattle noise, especially at idle and low rpms. At higher rpms, I'd think the booming engine sound would mask the diesel noise.
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