The EWG FAQ (External Wastegate) - Page 9

2jzgte · 04-10-2008, 09:40 AM

The EWG springs are rated @ a boost pressure typically (e.g. 10PSI spring, 14psi spring, etc). You will not be able to run less boost than the EWG spring rating. Pick an EWG spring rate as close to the minimum boost pressure you run as you can. In theory, this minimizes your spoolup times by holding the wastegate shut until the boost target is reached better than a lower rated spring would.

Quote:

Originally Posted by eroc263

Is there any formula for figuring out which size spring to use with a particular application or boost level?

eroc263 · 04-10-2008, 01:34 PM

Quote:

Originally Posted by 2jzgte

The EWG springs are rated @ a boost pressure typically (e.g. 10PSI spring, 14psi spring, etc). You will not be able to run less boost than the EWG spring rating. Pick an EWG spring rate as close to the minimum boost pressure you run as you can. In theory, this minimizes your spoolup times by holding the wastegate shut until the boost target is reached better than a lower rated spring would.

OK that helps a little. I have a yellow (10psi) spring in my Tial and was just curious if this would be sufficient when boosting at 22-25psi. Thanks for the help.

Millie · 04-10-2008, 04:01 PM

Anyone able to fit an EWG with the APS TBE? I've been looking down the DP and it looks like there is very little room due to the large flanges.

BunaSTi · 05-09-2008, 08:54 AM

sutter2k · 05-29-2008, 11:11 AM

How much value is retained by going EWG but plumbing the dump tube back into a catted downpipe? Is it still worth it? Is it better to plumb it in after the cat?

NSFW · 05-29-2008, 08:05 PM

I really like the idea of an EWG with a catted DP, plumbed back in post-cat. You get the clear conscience of a catted exhaust 90% of the time, with some catless flow advantages just when you need it. Seems like a good match to me... Haven't seen any cars set up that way but it appears possible, if there's enough room. Depending how the UP & EWG are done, it can get kinda tight in there.

Seventy STi · 05-29-2008, 09:26 PM

BayAreaRacing.org GTO vs STi - Video

Seans car. Just though I do add a video on the thread. UR 38mm kit, Stock turbo and HKS carbon TI

Otter · 05-30-2008, 04:41 AM

Quote:

Originally Posted by Seventy STi

BayAreaRacing.org GTO vs STi - Video

Seans car. Just though I do add a video on the thread. UR 38mm kit, Stock turbo and HKS carbon TI

The title is a little misleading, I thought the GTO was going to be trying

Maverick31 · 05-30-2008, 04:51 AM

Quote:

Originally Posted by Otter

The title is a little misleading, I thought the GTO was going to be trying

LMAO!!!!

Maverick31 · 05-30-2008, 04:59 AM

Well, after actually viewing the video, it looked like the GTO was racing. I have no idea why it got walked on so bad. Well, it did sound like the STi got the punch on him. Still, that STi sounded pretty nice.

04-10-2008, 04:01 PM	#83
Millie Silver Member Feedback Score: 8 reviews Car: 2006 OBP STi My Stuff: Subaru Parts Fav Mod: Snow Location: Alberta Posts: 1,947 IWSTI Addict since: Sep 2006	Re: The EWG FAQ (External Wastegate) Anyone able to fit an EWG with the APS TBE? I've been looking down the DP and it looks like there is very little room due to the large flanges.

05-09-2008, 08:54 AM	#84
BunaSTi Senior STI Driver Feedback Score: 0 reviews Car: 05 STi Posts: 382 IWSTI Addict since: May 2007	Re: The EWG FAQ (External Wastegate) suscribed

05-29-2008, 11:11 AM	#85
sutter2k Professional STI Racer Feedback Score: 2 reviews Car: Silver 08 STI(stg 2) Location: Willow Grove PA Posts: 821 IWSTI Addict since: Dec 2005	Re: The EWG FAQ (External Wastegate) How much value is retained by going EWG but plumbing the dump tube back into a catted downpipe? Is it still worth it? Is it better to plumb it in after the cat?

05-29-2008, 08:05 PM	#86
NSFW Professional STI Racer Feedback Score: 0 reviews Car: 05 Legacy GT Fav Mod: 7" LCD in dashboard, and laptop in the back Location: Seattle-ish Posts: 678 IWSTI Addict since: Apr 2007	Re: The EWG FAQ (External Wastegate) I really like the idea of an EWG with a catted DP, plumbed back in post-cat. You get the clear conscience of a catted exhaust 90% of the time, with some catless flow advantages just when you need it. Seems like a good match to me... Haven't seen any cars set up that way but it appears possible, if there's enough room. Depending how the UP & EWG are done, it can get kinda tight in there.

05-29-2008, 09:26 PM	#87
Seventy STi The Next Petter Solberg Feedback Score: 1 reviews Car: 07 Satin White Pearl Fav Mod: My name is Roy! Location: SoCal Posts: 872 IWSTI Addict since: Jul 2007	Re: The EWG FAQ (External Wastegate) BayAreaRacing.org GTO vs STi - Video Seans car. Just though I do add a video on the thread. UR 38mm kit, Stock turbo and HKS carbon TI

05-30-2008, 04:59 AM	#90
Maverick31 Spec C Club Feedback Score: 3 reviews Car: Blue 2006 WRX STi Fav Mod: APS SS45 Location: Port Huron, Michigan Posts: 1,013 IWSTI Addict since: Mar 2008	Re: The EWG FAQ (External Wastegate) Well, after actually viewing the video, it looked like the GTO was racing. I have no idea why it got walked on so bad. Well, it did sound like the STi got the punch on him. Still, that STi sounded pretty nice.

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