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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Vishnu Exhaust-- suggestions?



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      02-27-2007, 05:47 PM   #67
MichaelATL
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Quote:
Originally Posted by HyperM3 View Post
1) Price - The price has to be reasonable. Why is exhaust so friggin expensive these days? It would be great if there were group buys on this too. It seems you already have a price set at 1600 from looking at your package deal for $3000 with the PROcede. I think 1600 for exhaust is murder.

2) Performance - Make it work the way YOU expect it to work on your own car. This way you will be happy with the final product on customers cars.

3) Fit and finish - Stock looking single pipes just a little bigger diameter. Rolled tips are nice and easier to clean. Theres a lot of people asking for SO many tips here its insane. Remember, you cant please 100% of the people 100% of the time.

4) Sound - Keep it sounding like a BMW. I personally love the sound of the Tri-flo on my M3. I dont like raspy sounds, just throaty and in charge. Even the possibility of removable baffles so people can adjust the sound to their preference.
I agree.
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      02-27-2007, 07:45 PM   #68
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Turboback with bolt-on/bolt-off cats that can be replaced by a test pipe when the cats are off. Other then that I'll let you guys take care of it.
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      02-27-2007, 08:43 PM   #69
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Quote:
Originally Posted by retrodrive View Post
Perfect exhaust would scream when you get on it and be quieter (almost stock-like) in lower RPM ranges. Obviously no rasp. There are going to be plenty of loud exhausts on the market very shortly, because they are easy to make. Stand out and make something unique (yeah, no magnaflows)

Also, make sure that later addition of aftermarket downpipe won't create any unpleasant surprises in the exhaust tonality. If possible give a choice of double or quad exhaust tips.
^+1

Shiv: No obnoxious noise at idle or low rpm...

I've got to bring up my Brabus exhaust I had on my CL 500...it was just as the poster above described...quiet...until the pedal was mashed and then everybody around knew I was on it.

Quads = retrofit rear apron =

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      02-27-2007, 09:18 PM   #70
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Shiv: I agree with OC kid Not to loud at low rpm, crusing speeds but when the pedal is mashed to the ground let it scream! Loud exhaust are for the teens and early 20's.
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      02-27-2007, 09:29 PM   #71
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Shiv: I agree with OC kid Not to loud at low rpm, crusing speeds but when the pedal is mashed to the ground let it scream! Loud exhaust are for the teens and early 20's.
Hey! :mad:
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      02-27-2007, 09:30 PM   #72
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Please make it sound like a F430.
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      02-27-2007, 10:17 PM   #73
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Quote:
Originally Posted by Terro View Post
Shiv: I agree with OC kid Not to loud at low rpm, crusing speeds but when the pedal is mashed to the ground let it scream! Loud exhaust are for the teens and early 20's.
Yeah, Im pretty over the constantly loud exhaust thing. When I want loud and obnoxious and "hey look at me" I take out my M3 or my Ducati. For my DD I want inconspicuous and not neighbor waking.
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      02-27-2007, 10:18 PM   #74
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This is exciting. I wont have my car for 6 months but I want to make a wish also.

It seems folks are always going to have different tastes so I would really like to see two options.

1. For the folks who are interested in a more subtle sound. You cant have max flow without a lot of volume so perhaps a model with more resonators or smaller piping for these folks.

2. As we know, turbos do fine with very very large piping. For the one i'd order or have made, i'd want you to go wild with it assuming also that people buying this model may be modding to an even higher degree in the future. Straight through mufflers to increase flow. A nice euro tone using a perforated core or whatever you feel comfortable with. Not sure if x-piping will yield gains but if you see them from it, I would want it.

For both of the above I would want a the highest quality stainless (not going to shell out 4 grand for a titanium exhaust and not many people will). I would also like both to include v-band clamps so folks could swap sections for race v. street version quickly and easily. We could also order both sections from you so we can use one for track and one for family.

Obviously ditching the cats not monitored and/or replacing units with a high quality precious metal HFC such as an HJS or similar unit would be my preferance for street driving (no MIL) with the option to vband in a testpipe for racing.

Thanks for asking the forum.

cheers! Mike
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      02-27-2007, 10:57 PM   #75
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Turbo Back!
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      02-27-2007, 11:13 PM   #76
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Yes, V-band clamps always make things 100 times easier to take on and off. Especially if you plan on coming out with a downpipe, it would be nice for the new connection to the exhaust to consist of all V-band clamps.
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      02-28-2007, 12:03 AM   #77
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Like I said turbo-back. And I like hearing it at Idle, as long as its not droning and obnoxious its cool. Or at least quiet at idle and start to hear it with the slightest of throttle. I dunno, I don't like crazy loud, but I like to be heard when I wanna be heard, and I like the exhaust note to be deep and throaty.

Again. Turbo Back is a must. With optional cats and stuff.
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      02-28-2007, 12:26 AM   #78
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just flying through some of the posts, and overall, theyre so many different types of people with common goals.

things that dont need to be stated

**lightweight design**(we dont need to state this, no one in their right mind will slap on a exhaust that weighs 10lbs more than stock) its sort of a slap in the face for a tuner lol
**pricing** (if they want to sell, they'll find a happy medium, if its too high, no one will buy, too low and they lose money)

Peformance/Sound/Looks are the main points. find a formula that worked for other companies and build off that. perfection is not possible for bmw owners, theres always that next level, that other tuner, that other guy who has more money etc.

its nice that Vishnu asked for suggestions, but its pretty clear what people want, deliver a product that you would be proud to sport on your own 335i and i think you're set! sound is really subjectiive and all ears. everyone appreciates better performance and looks are to" the eyes of the beholder"

as for the tip/materials issue, place a poll and the figures will speak for themselves
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      03-02-2007, 11:26 AM   #79
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I'll put my vote down for Magnaflows ... on my last car I experimented with different set-ups (Vibrant, Dynomax, & Magnaflow) and for me the Mags sounded the best ... had more of a burble, which I personally prefer.
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      03-05-2007, 06:02 PM   #80
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I have heard a turbo-back exhaust for this car and it sounded like crap it was the umm I think ultimate racing exhaust maybe but anyways I know the Milltek sounds good also wait for an Eisenman(i think this is how to spell it)
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      03-05-2007, 06:07 PM   #81
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Can you hack the PROcede to simulate the post cat o2 sensors?
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      03-05-2007, 06:28 PM   #82
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Can you hack the PROcede to simulate the post cat o2 sensors?
No need to hack it. It already has that capability
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      03-05-2007, 06:34 PM   #83
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Damn!! Really? Right from the PCM harness? When will they be in stock for socal guys?
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      03-05-2007, 07:00 PM   #84
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Damn!! Really? Right from the PCM harness? When will they be in stock for socal guys?




It's one of the things I haven't had the time to test thoroughly yet in the 335i since our own car doesn't need it. But its certainly something useful for those guys who choose to go catless down the road (boo hisss!).

-shiv
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      03-05-2007, 07:56 PM   #85
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Pretty cool! It will be a hot item when they start making off road down pipes...
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      03-05-2007, 08:39 PM   #86
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I'm not too sure whether I'm too late to add my two cents, but I think the exhaust pipes should be as straight as possible from the downpipe to the tip, with minimal bends.

As little back pressure as possible would be ideal for better spooling of the turbos.

Exhuast note: low rpms should be bassy and high rpms should be a roar

Lightweight assembly at a 'reasonable' price.

Last edited by andyc; 03-05-2007 at 09:56 PM.
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      03-06-2007, 12:57 AM   #87
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Quote:
Originally Posted by umcool911ok View Post
I have heard a turbo-back exhaust for this car and it sounded like crap it was the umm I think ultimate racing exhaust maybe but anyways I know the Milltek sounds good also wait for an Eisenman(i think this is how to spell it)
There is no turbo-back exhaust available yet. I doubt you have heard how one sounds. The sound depends mainly on the mufflers - not that much if its turbo- or cat-back.
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      03-06-2007, 01:41 AM   #88
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Hears a few Shiv,

1 - Stainless steal
2 - Tig welded
3 - Try to make a turbo back system
4 - Choice of tips (I think Miltech did this)
5 - And oh yeh... Keep the price as low as possible
6 - Make systems for both the 335i coupe and sedan available at the same time

Last edited by SpdFreak; 03-06-2007 at 03:44 AM.
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