|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Anyone considered: QTP/DMH Electric cutout?
|
|
04-16-2012, 12:43 PM | #1 |
Banned
61
Rep 905
Posts |
Anyone considered: QTP/DMH Electric cutout?
Hey guys, I put this on the UK forum but got no response as this seems to be a more U.S predominant mod!
I got a mid sport exhaust fitted into my car last month which sounds absoloutley awesome. Its not intrusive and it just adds a deeper tone. I want my car to sound more evil upon acceleration, without installing a louder backbox etc. I dont want my car to sound like an aeroplane whilst driving at 20mph. I stumbled across these badboys! They are both leading manufacturers of electic cutouts. Basically, with a flip of a switch, you can control that raging exhaust sound. I'm not an expert but all I know is, there is a flap that opens upon flipping the switch and BOOM! QTP Electric cutout: http://www.quicktimeperformance.com/QTEC/ DMH Electric cutout: http://www.dmhperformance.com/ DMH: not sure what car this is on but good example of mechanism: QTP: What do Y'all think? Legit? |
04-16-2012, 01:04 PM | #2 |
Lieutenant Colonel
213
Rep 1,780
Posts |
Wouldn't that decrease Hp?
__________________
Koni special active red, eibach pro-kit springs, Remus exhaust, stage 3 intake manifold,Stage 2 AA tune, BMW Short shift kit. Silicon intake pipe. M3 control arms front, M3 rear. ECS trailing arm with whiteline bushings. Purple powerflex subframe bushings. Yellow power flex upper shock mounts. Single mass flywheel OE weight.
|
Appreciate
0
|
04-16-2012, 01:36 PM | #3 |
Banned
61
Rep 905
Posts |
Will it be a significant loss? ive seen people boasting about minor gains (IF TUNED CORRECTLY)
I dont know much about this but i'll definately look into it more! Both company website comment on increased performance but I know that's probably just the marketing team talking! |
Appreciate
0
|
04-16-2012, 01:39 PM | #4 |
Banned
42
Rep 2,009
Posts |
i knew someone with an audi s5 who had this done.
it was crazy loud with alot of drone, and it was very obvious the sound was coming out from under the car, like right where the front windows were. FYI the new shelby mustang has a cutout and has side exhaust (where the cutouts lead) and a normal tailpipe outlet at the back. they showed the whole car on its side and you could see the valves. personally i think its too loud as it is right next to your window |
Appreciate
0
|
04-16-2012, 01:49 PM | #5 | |
Lieutenant Colonel
213
Rep 1,780
Posts |
Quote:
__________________
Koni special active red, eibach pro-kit springs, Remus exhaust, stage 3 intake manifold,Stage 2 AA tune, BMW Short shift kit. Silicon intake pipe. M3 control arms front, M3 rear. ECS trailing arm with whiteline bushings. Purple powerflex subframe bushings. Yellow power flex upper shock mounts. Single mass flywheel OE weight.
|
|
Appreciate
0
|
04-16-2012, 02:03 PM | #6 | |
Banned
61
Rep 905
Posts |
Quote:
I've seen people buy a downturned pipe to combat that so tht drone is not too excessive! In all honesty, I'm only going to use this when i'm at the lights...ready to launch! and then switch it off as soon as I get up to cruising speed! LOL I'll get a ECU remap to compensate! Thanks mate! |
|
Appreciate
0
|
04-16-2012, 02:10 PM | #7 |
Nate Dogg
8
Rep 437
Posts |
I would worry more about the quality of the product and whether it will hold up the extreme heat. These have been around for years and everyone I know who has ran a set of electric cutouts has had issues with the electrical system/motors not holding up.
-Nate
__________________
2011 BMW 328i by weekend, various airplanes by week.
|
Appreciate
0
|
04-16-2012, 02:14 PM | #8 |
Banned
61
Rep 905
Posts |
Thanks mate! I believe DMH comes with 4 years warranty on the product! Hopefully any problems I occur will be sorted out during that period!
|
Appreciate
0
|
04-16-2012, 03:24 PM | #9 |
Colonel
77
Rep 2,114
Posts |
The problem is you are losing a TON of your back pressure. It may not sound like a huge loss in HP but you are effectively decreasing your torque numbers DRAMATICALLY.
Your power off the line will be much worse.
__________________
E92 '08 335Xi 6AT - Cobb AP3 Tuned by MAC Autosport, Original Prototype Xi DOCRace 6266 Single Turbo Swap, VRSF CP w/Synapse BOV, VRSF 7" FMIC, BMS Cowl, H&R Coilovers, Renn Motorsport RS-51's, Stoptech Stage 2 Slotted, xHP Stage 3, Earl's Racing Oil Cooler, Turner Boost Gauge, M3 Lip Spoiler.
Standing Mile Record Holder for Xi over a mile high: 168.2MPH @ 5512'; The Colorado Mile hosted by The US Mile. |
Appreciate
0
|
04-16-2012, 03:38 PM | #10 | |
Banned
61
Rep 905
Posts |
Quote:
Thanks for the info! |
|
Appreciate
0
|
04-16-2012, 04:59 PM | #11 |
Major
92
Rep 1,456
Posts |
Electric cutouts work very well on turbo cars. The turbo vanes themselves provide most of the necessary back pressure. After the tubo you want to get the exhaust out as quickly as possible.
On an NA car you will lose the back pressure and alot of torque with it. It would be damn loud too on an N52. |
Appreciate
0
|
04-16-2012, 05:23 PM | #12 | |
Captain
91
Rep 611
Posts |
Quote:
also US N52 cars had two sets of cats, i dont think its gonna need any more back pressure to generate low rpm tq. even for euro with 1 sets of cat i dont think its gonna be too much problem, with double vanos and valvetronic, N52 can manage its valve overlap pretty effeciently.
__________________
N51- PI - PE - ESS Tuned - SSK - CDV Delete - AFE Header - B12 - Mfactory LSD
|
|
Appreciate
0
|
04-16-2012, 05:26 PM | #13 | |
Major
92
Rep 1,456
Posts |
Yea depends where you place the cutout. If you had headers and this dump it would be real loud. If you did it with stock manifold retaining primary headers then it would be a little more muted. I was speaking to the traditional na vs turbo interms of back pressure.
I think youre right about the N52 being bale to adapt well. I personally love loud so this wouldn't bother me. Someone man up and do it. I cant spend more cash right now. Quote:
|
|
Appreciate
0
|
04-16-2012, 05:35 PM | #14 |
Colonel
704
Rep 2,604
Posts
Drives: 06 330i E90, 18 530xe G30
Join Date: Dec 2010
Location: Toronto
|
I dunno that sound clip of the M3 was pretty convincing... my god was that a nice sound when they had the valves open!!
|
Appreciate
0
|
04-17-2012, 09:00 AM | #15 | |
Nate Dogg
8
Rep 437
Posts |
Quote:
-Nate
__________________
2011 BMW 328i by weekend, various airplanes by week.
|
|
Appreciate
0
|
04-17-2012, 09:50 AM | #16 |
Captain
37
Rep 608
Posts |
This is pretty popular mod for people who want to stay emissions friendly while being able to go to the track... Apparently its not about back pressure loss, but about maintaining velocity... With a proper setup you should yield gains...
Have to add this video, not relevant to discussion really, but fun to watch. Member at mbworld and his wife + cutouts. I died laughing the first time I watched it... Last edited by E90 87ss; 04-17-2012 at 11:55 AM.. |
Appreciate
0
|
04-17-2012, 06:29 PM | #18 | |
Banned
82
Rep 984
Posts |
Quote:
|
|
Appreciate
0
|
02-17-2013, 01:58 PM | #19 |
Lieutenant
100
Rep 502
Posts |
anyone done this yet before the secondary cats? Ive seen youtube videos of them right before the mufflers but i wanna do a dump after the dp...and will the cutout fit in there because its pretty tight in there...i really really wanna do this set up
|
Appreciate
0
|
02-19-2013, 11:55 AM | #20 |
Captain
66
Rep 790
Posts |
on the camaro i had in the sig it was a 9rwhp gain. But that motor has 11.8.1 compression.
On the BMW or audi.....no. dont do it. Also the ele. portion are total crap. They break over and over again. leak, etc etc in 3 yrs (with the car in storage for winter) i went threw 4 of them. never again.
__________________
2010 335i M sport
2008 328i 2006 325i 1995 Z28 6spd - 377rwhp rip |
Appreciate
0
|
Bookmarks |
|
|