I was expecting for this

 

Definately the cutout w/ dp option. no side exit for me though ... as i live in cali

 

Wouldn't it better if when the cutout is opened it somehow closes off the stock piping?

 

If you run a dump to atmo you can do serious damage no? I thought ECU's needed to be tuned to properly use them....

Anyone like to chime in?

 

True ... tuning an open dp is alot tougher then trying to tune a tbe. reason being, boost spike.

if you don't know what boost spike is, type "Boost Spike" into the search button and you will find out.

breathing TOO much is not alwayz a good thing.

 

Im just playing dumb, to ask the questions some people dont even know to ask.

I help my best friend tune his GLI with a 3 inch dump

 

[quote author=CaSHMeRe link=topic=77867.msg1421741#msg1421741 date=1179522526]
True ... tuning an open dp is alot tougher then trying to tune a tbe. reason being, boost spike.

if you don't know what boost spike is, type "Boost Spike" into the search button and you will find out.

breathing TOO much is not alwayz a good thing.
[/quote]
Yes, the ECU is expecting a certain amount of exhaust restriction as part of its algorithm to control the wastegate solenoid valve. Anything that causes the turbo to spool up faster on the MS3 (for example a test pipe) will cause boost spikes.

 

Wow, is the MS3 community really that young in stage? I was expecting at least a bit more of an enthusiastic response than this after being away for a short while.

I agree with y'all as far as running this mod on a non-tuned MS3 (not so great an idea!), however, the thread wasn't so much to see who'd be willing to put this kinda product on their MS3 immediately, but to generate interest so QTP knows there's a market for them.

Once the ecu tuning devices start poppin their heads up, this will be a mod I, for one, will consider, and I think one that a few of y'all will too once it can be properly utilized. For some of us, this mod is a perfect balance between street drivability/friendliness and power.

Again, I threw this out to gauge interest. For those of y'all familiar, QTP is NOT a fast-to-produce type of company, and the sooner they know there's some kinda market for us, they'll start looking into it. By the time they are able to release something, I'd expect more tuning devices to have already been released.

So, come on y'all! Just throw out support, so I can push for them to do some of their own R&D. Afterall, the more products and options out there, the better, right??!

BTW, if you haven't checked out their site, do so when you have a chance. Check out not only the cutouts, but the downpipes they have for the Evo, STi, and SRT. I've seen an Evo piece in person, and it's quality is as good as any leading name brand's. The cut-out feature just makes it all the more sweeter and meaner. Prices are quite reasonable, too!

 

that looks and sounds good to me! and what my friend back in NZ wants me to do. I like the concept of flicking a switch to stock just in case your sitting next coppers

 

I'M in remember my name i'll be a damn test car if need be

 

breathing TOO much is not alwayz a good thing.

mmmnn no.

a turbo would love nothing more than to breathe without any pipe behind it, if it could, i understand about the computer and it having programmed some back pressure to the turbo, but i can tell you those cutouts WORK!

on an srt it gives HUGE increases in power...the best thing is that you leave your stock exhaust on, and electronically open the cutout when it's needed (loud as hell with it open though)

and you guys should worry so much about 'boost spykes', at the beginning stages of srt's coming out without any aftermarket, we all use to 'induce boost spike' by installing a bleed at the turbo, some guys would BEND their external waste gate arms to open slightly more and add springs to keep it open more, all kinds of ghetto things, none blew up from this "boost spike" oohhhh...boost spyke, watch out!

Tell you what, i loved the way my srt would rip the tires loose due to this boost spike coming on early and with a wide band installed and regularly monitoring it, it never got into the danger zone, they all run pig rich and you couldn't boost the stock turbo enough to cause a lean condition.

The gain from a small bleed was in the 30 whp range.
So, welcome the boost spike...

 

[quote author=robino link=topic=77867.msg1431181#msg1431181 date=1179925781]

breathing TOO much is not alwayz a good thing.

mmmnn no.

a turbo would love nothing more than to breathe without any pipe behind it, if it could, i understand about the computer and it having programmed some back pressure to the turbo, but i can tell you those cutouts WORK!

on an srt it gives HUGE increases in power...the best thing is that you leave your stock exhaust on, and electronically open the cutout when it's needed (loud as hell with it open though)

and you guys should worry so much about 'boost spykes', at the beginning stages of srt's coming out without any aftermarket, we all use to 'induce boost spike' by installing a bleed at the turbo, some guys would BEND their external waste gate arms to open slightly more and add springs to keep it open more, all kinds of ghetto things, none blew up from this "boost spike" oohhhh...boost spyke, watch out!

Tell you what, i loved the way my srt would rip the tires loose due to this boost spike coming on early and with a wide band installed and regularly monitoring it, it never got into the danger zone, they all run pig rich and you couldn't boost the stock turbo enough to cause a lean condition.

The gain from a small bleed was in the 30 whp range.
So, welcome the boost spike...


[/quote]

again, ur referring to an srt-4. Very much different ecu then the ecu we have here in the MS3. I too used to be an srt4 owner, and when i was running an open dp, wideband tuned, my boost spike was outrageous...

i would hit/spike at 20/21+ then fall quickly to only like 12-13 lbs. granted, i made extra hp in that millisecond for the spike, but falling off rapidly like i did, i ended up losing more then gaining.

on the srt, the ecu seemed to regulate almost nothin, even boost. didn't regulate any type of metered air, both via intake/charge itself or exhaust. The best mod i ever encounted with the srt was the WGA, and that was the only thing that seemed to hold the boost.

and ur statement about not running lean with a stock turbo, is completely and utterly FALSE. granted, our injectors can hold 1600 psi, but what is regulating that fuel being released ? its all coming back to the ecu. the ms3, like the srt, runs pig rich out of the gate. however, boosting too much, throwing a huge shot of nitrous on, or running open dp, cai, fmic, with no type of tuning what-so-ever, will definately lean the car out.

 

if you reeeeally wanna go fast, you're gonna have to lean your car out.

to the point where it WON'T blow up, course...

i can show you an srt4 with 119,000 miles that has had a bleed on the turbo and has been beat to shit on a daily basis on 100% stock everything and still runs as strong as it did day 1.

he's pushing 18-19 psi on the stock turbo with the early boost, and has a quick battery disconnect inside the cabin for when the computer pulls timing/fuel after sensing overboost...He re-sets the computer daily and has never run into a lean condition dangerous enough to melt his pistons. Knock sensor does a fine job to prevent that from happening.

I would love to see someone install a Cutout on an MS3 and monitor it on the dyno, i bet it would be just fine and make a ton of power on such a cheap and convenient mod.

 

[quote author=robino link=topic=77867.msg1431181#msg1431181 date=1179925781]

mmmnn no.

a turbo would love nothing more than to breathe without any pipe behind it, if it could, i understand about the computer and it having programmed some back pressure to the turbo, but i can tell you those cutouts WORK!

on an srt it gives HUGE increases in power...the best thing is that you leave your stock exhaust on, and electronically open the cutout when it's needed (loud as hell with it open though)

and you guys should worry so much about 'boost spykes', at the beginning stages of srt's coming out without any aftermarket, we all use to 'induce boost spike' by installing a bleed at the turbo, some guys would BEND their external waste gate arms to open slightly more and add springs to keep it open more, all kinds of ghetto things, none blew up from this "boost spike" oohhhh...boost spyke, watch out!

Tell you what, i loved the way my srt would rip the tires loose due to this boost spike coming on early and with a wide band installed and regularly monitoring it, it never got into the danger zone, they all run pig rich and you couldn't boost the stock turbo enough to cause a lean condition.

The gain from a small bleed was in the 30 whp range.
So, welcome the boost spike...


[/quote]

You are missing the point.

At the very least, a large spike in the boost pressure is likely to cause detonation. When that happens, the ECU will retard the timing and you will end up with less power when the boost settles down.

In my case, I am getting a moderate overshoot in the boost pressure with only a test pipe. I can see that the ECU is retarding the timing in response to the knock sensor. I cannot afford to put racing gas in the car every week.

Cobb uses a different algorithm to control the wastegate solenoid valve in cars that have modified exhaust systems so that there is no overshoot in the boost pressure (boost spikes). Correct tuning includes proper control of the turbo wastegate.

 

At the very least, a large spike in the boost pressure is likely to cause detonation. When that happens, the ECU will retard the timing and you will end up with less power when the boost settles down.

once again,

He re-sets the computer daily and has never run into a lean condition dangerous enough to melt his pistons. Knock sensor does a fine job to prevent that from happening.

Lesson learned, you make more power, you re-set computer daily so it won't continue to cockblock by retarding/cutting fuel.

Until you get the Cobb AP.

 

Good discussion, but let's try to save that for another thread, and get back on topic...

For those that support the idea of another company looking into making MS3 parts, just voice it out. Keep it coming!!

 

[quote author=Focused link=topic=77867.msg1432702#msg1432702 date=1179963716]
Good discussion, but let's try to save that for another thread, and get back on topic...

For those that support the idea of another company looking into making MS3 parts, just voice it out. Keep it coming!!
[/quote]

i wish a company would come forward with simple data logging that was user friendly and would allow the "Average Joe" tuner, to tune by himself. I am sure most people would be willing to pay top $$$ for a software like that

 

Whether or not they make a DP with a built-in motorized cutout or I pick a DP and modify the race pipe for a cutout, the idea is appealing to me. I like the stealth of the stock exhaust and am reluctant to cut it off as I haven't seen any solid evidence that it's that restrictive to begin with, not to mention the cost of an aftermarket cat-back verses the performance gains.
My only real experience with exhaust cutouts is from a friend's '55 Chevy. Cast iron and manually operated, they were noisy, they leaked and rattled. But it was a cool novelty at the time. Also a butterfly design. I will try and find out how the QTP unit is built, mostly for sealing and longevity, as it's not that expensive for a single 3" set-up.
Another concern is providing you could optimally tune your car for all your mods....would you tune it for everyday driving with the cutout closed (maybe slightly rich)? For the most power with the cutout open?
Not sure if it's something I'll do but will definitely do some more research and I welcome all opinions & experiences.

Note: on their website WRX video, the top bolt on the plate is loose. :huh:

 

That would be sweet assuming Cobb's AP will allow you to switch back and forth between and custom tune to stock/stage1. Flip a switch, push a couple buttons to wake up the beast!

 

i would probably get it tuned with the c/o open. Then just run pig rich the rest of the time :lol:

+1 for the stealth look of the stock exhaust, plus i will have no issues here in cali, so this is very appealing.

 

I'm interested, you gonna write them an e-mail Focused?

 

i will be getting an exaust cut-out. my brother just put one on his 07 sti and with his Utec engine management he just clicks a button to switch maps. it was awsome. i hear utec may make one for our car but i hear lots of lies too.

 

If your going to quiz them...ask if they would do an all stainless assembly. Dissimilar metals (aluminum & cres) won't get along for very long, especially in that environment.

 

Another
http://www.dmhperformance.com/

 

I am getting one. I have it on order. These are not vehicle specific and require no test vehicle. I am getting the 3" from DMH as I like their design better.