Grimspeed EWG

[AaronWRX]

check out this example from JDMSpecC: http://forums.nasioc.com/forums/show....php?t=1523859

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[torinalth]

very nice. however i wonder how close it is to the axle by the way it is not "parallel" to the main pipe.

T

[InfamousDX]

Yea these pics don't mean much w/o actual in-car fitting.

[stretchedk7]

If your on a stock turbo as it seems no need for ewg. It will however be super loud if you do get one and will make a tad bit more power with your setup but you should get tuned with the ewg. Oh yeah btw it doesn't have to make noise unless you want it to!

[SeventySTi]

Picture of the Gimmspeed products. EWG kit with 38mm Tial. Also Gimmspeed exhaust manifold w/ crosspipe.



Video on UR EWG kit on Mr.11.7 downsti car. Thats how loud it is and when you not on freeway like at locate with lower gears it will be even louder since no wind noise and such. So expect to be louder than that.

http://videos.streetfire.net/video/B...-vs_120202.htm

[TJ]

Originally Posted by AaronWRX

check out this example from JDMSpecC: http://forums.nasioc.com/forums/show....php?t=1523859

talk about some SICK WELDS

[Defiant Autospeed]

Originally Posted by torinalth

Defiant, there are a few things i do not agree with.... and while I have no hard numbers, it is more of a physics issue that is where my concern is.

On the exhaust gains I agree. Plumbing back into the exhaust track will negate some of the gains from the EWG, however I think the loss would be very minor depending on the circumstances. Aside from all the criteria you listed for the ideal plmubing i think people have been missing one of the major factors that come from the EWG: Turbine efficiency.

Going with the EWG, will effectivly increase the size of the turbine once the WG begins to open. This is my mind makes a larger impact on smaler turbines vs larger turbines. say the difference of a td05 20g vs a SZ49 (td06H turbine with clipped wheel). as the 20g spools up quickly, due to its size, you will hit full boost fast. The concern is that the turbine is so small that after a certain RPM/boost there is just not enough room for the total amount of exhaust created, thus pressure builds and VE plummits.

With an EWG in the mix once the turbo hits full boost the EWG routs the excess gasses AROUND the turbine and back into the exhaust track later on. This would keep the engine at maximum efficiency by preventing the buildup of exhausst pressure between the engine and turbo. This also has the side effect of being able to run more boost farther into the RPM band then IWG due to the fact that all the exhaust going through the turbine being used to keep the turbine spinning, while the IWG config routes all gasses through the housing and will choke. the EWG doesn't solve this issue, just greatly assists it.

anyhow, I figured that would be a bit better explanation for most people... but dont think that plumbing the EWG back into the exhaust kills all the EWG gains... that is just not correct (assuming it is done propperly). however you will lose a touch of power... but honestly I think the boost cnotrol and the top end benafits are worth it... waiting for mine to be delivered.

T

I have read this post like 4 times and I cannot for the life of me find where you are disagreeing with me

[Defiant Autospeed]

Originally Posted by AaronWRX

check out this example from JDMSpecC: http://forums.nasioc.com/forums/show....php?t=1523859

YES!!!! that is EXACTLY how it should be done. Well, almost. I would put a flex in the up pipe and make the re-entry a bit more gentle, but thats fairly gentle as it is.

I am going to just say it flat out, this is the best recirculating EWG kit I have seen to date. Period. These guys did it right. Its a pity that is isnt for a normal bolt on turbo though. Maybe they make one?

[Dubstar112]

How does placement of the external waste gate in relation to the flow of exhaust through the upipe come in to play? See how the waste gate is inches away from the main pipe and at an angle which could cause a pressure wave in the pipe... " Y " . I wonder if making the waste gate tube point in the opposite direction(down 180 degrees) would net any gains.. or be harmful?

[I3andit]

Originally Posted by GrimmSpeed

if you wanted to wait a bit you could probably snatch up one of our 44mm dump tubes and that would solve your problem. we make the dump tube so it is routed past the axel and dumps to the ground(not onto anything).

Justin

When will this be available I would like to pruchase one? shoot me a PM

[gtasti]

ok heres a question

if i wanted to plumb back with a catted dp would it have to come back in after cat or before?
or would it be better should i say

[torinalth]

Defiant. I was specificialy referring to the following part:

Bringing that flow back into the turboback negates the benefits of the EWG essentially making the TBE perform as if it were larger (because it doesnt have to flow as much, it flows easier) (yes that is a REALLY bad explaination and I am sure will lead to people misunderstanding it, if I think of a better way to word it, I will edit it)

I suppose the points of it "increasing TBE size" in that wording eludes to that being the ONLY benafit to adding an EWG. Maybe disagree was incorrect, and rather clarify would have been more appropriate wording.

To the above poster as far as where to plumb it back... lets just use the cobb downpipe for an examlpe. you would want to plumb it in right before the cat. (there is no more space AFTER the cat). where the APS has a cat much higher in the downpoint, you would want to plumb as close to the flange as the bolts will allow. If there is a downpipe that has enough space to plumb back in either before OR after then it is your choice, plumbing after the cat would bring a "possible" advantage over before.... but honestly if everything else is covered then you are really talking about fractions of HP.

[gtasti]

Originally Posted by torinalth

Bringing that flow back into the turboback negates the benefits of the

To the above poster as far as where to plumb it back... lets just use the cobb downpipe for an examlpe. you would want to plumb it in right before the cat. (there is no more space AFTER the cat). where the APS has a cat much higher in the downpoint, you would want to plumb as close to the flange as the bolts will allow. If there is a downpipe that has enough space to plumb back in either before OR after then it is your choice, plumbing after the cat would bring a "possible" advantage over before.... but honestly if everything else is covered then you are really talking about fractions of HP.

thanks for the reply
btw i have a shorty dp with a cat

[GDAryder]

very interesting stuff going on in here. im deff thinking of this setup (38MM EWG sitting in garage right now)

[WaXed]

going to all the trouble of installing an EWG just to overcome boost creep is a lot of effort and $

boost creep occurs when the boost controller opens the wastegate and it is not venting enough exhaust gas through it, thereby driving the turbine harder and creating more boost

usually iboost creep is going to happen when you push up the flow on a turbo with a relatively small hotside coupled with larger size compressor
ie. increasing boost is pushing the exhaust flow up

simple fix for this is to
a/ increase the A/R of the turbine housing
b/ increase the flow area of the internal wastegate and improve the inflow area with a die grinder

ie. if the internal wastgate flow area is 25mm dia you can increase it to 26mm (the flap still makes a positive seal and you have increased the wastegate flow capacity by approximately 10%
you also need to increase the size of the spring in the wastegate actuator
otherwise the increased surface area may allow the wastgate to open earlier than wanted

c/ both a/ and b/

d/ install a turbo that doesn't have boost creep issues

if you have a more greatly size mismatched turbine/compressor then maybe an external wastegate is what is required...

[GDAryder]

going to all the trouble of installing an EWG just to overcome boost creep is a lot of effort and $

not when done properly . grimmspeed has made the change quite affordable. besides the up-pipes they sell have the option of a block-off plate for if and when the customer decides to go back to using an IWG on their turbo. as long as ur boost control system is in good order, and ur tune is good to go, switching wastegates should not be that big of a deal. (as long as you keep the IWG that your turbo initially came with)

[GDAryder]

to add to that when u have a dump tube pointed to the ground and AWAY from close suspension parts, you decrease the chances of having soot everywhere. besides you could always have it re-circ'd if u feel like spending the money to do so.

[sidewayz]

Originally Posted by TJ

talk about some SICK WELDS

you wont say that when they fail.. half of those welds are root passes.. ie: no filler material. bad mojo. Esp on the flanges they didn't use any filler rod.

[GDAryder]

yea that would suck if they failed lol

[vtecTHIS]

Originally Posted by sidewayz

you wont say that when they fail.. half of those welds are root passes.. ie: no filler material. bad mojo. Esp on the flanges they didn't use any filler rod.

thought i was the only one to notice that

[medamullet]

I run a EWG for my DD. It's only loud for everyone else on the road Inside it's not any louder than most after market eshausts, and it's only loud when you get on it. With my wife in teh car I can drive around with out it opening and it's just fine. But yes it will scare people next to you when you push the pedal to the floor

[GDAryder]

i want to run one so bad

[V8 GTFO Lesbic WGN]

Grimmspeed how long more for the EWG 44mm setup?

[GrimmSpeed]

Originally Posted by V8 GTFO Lesbic WGN

Grimmspeed how long more for the EWG 44mm setup?

so soon i can taste it. expect 2 big product releases in the coming weeks.

Justin