TD05 installed, now I have compressor surge

impostor · Post by **impostor** » Fri Apr 09, 2004 2:12 am

I finally got around to installing my new TD05-16G. Everythings hooked up right (i think) and Im running 9-10 psi. When I let off the gas it sounds like a rally car; the bypass valve makes a fluttering noise. Its the stock bpv, and I know a few people here have a similar setup. Any ideas of whats causing this?

Thanks,
Jim

rsstiboy · Post by **rsstiboy** » Fri Apr 09, 2004 4:22 am

the bov is causing it, its not big enough to expel all the air, you should hear how loud it is on 19psi!!

boostjunkie · Post by **boostjunkie** » Fri Apr 09, 2004 5:14 am

I never had that problem. Just a WHOOSH when I let off the gas. Perhaps your bov is on its way out?

BAC5.2 · Post by **BAC5.2** » Fri Apr 09, 2004 6:00 am

You always hear the fluttering on super high powered Supras and stuff. Sounds cool, but can't be good for any part of the turbo setup.

rsstiboy · Post by **rsstiboy** » Fri Apr 09, 2004 10:05 am

nah, its normal for the compressor to sound like that with the standard bov, don't worry about it, just get a bigger bov to help keep the thing spinning.

impostor · Post by **impostor** » Fri Apr 09, 2004 11:00 am

thanks for the help everyone. i was kinda thinking that. before i put the turbo on i was debating getting the GFB stealth bov, now i have an excuse to get it! does anybody know if an adapter will screw into the inlet of it b/c without one its way too big.

Thanks again everyone for the help
-Jim

boostjunkie · Post by **boostjunkie** » Fri Apr 09, 2004 1:34 pm

You'll have to get the bov designed for the v2 wrxs. They use a completely different setup than the new wrx.

rsstiboy · Post by **rsstiboy** » Fri Apr 09, 2004 11:41 pm

i'm going to be getting a AVO PLUMBACK bov, and increase the diameter of the hole on my i/c plumbing to accomodate the larger bov. make sure whatever bov you get is a plumback one, unless you have a ECU that allows you to remove the AFM.

91scoobiesubie · Post by **91scoobiesubie** » Mon Apr 12, 2004 3:01 am

impostor are your feul injectors ect stock?how much of difference in power?

impostor · Post by **impostor** » Mon Apr 12, 2004 7:13 am

for now my fuel injectors and pump are stock. injectors are running 80% idc. the pump is getting replaced in a few days. i havent driven it hard, cause the turbo's not broken in yet. it feels slower right now, i think due to the fact that my temporary turbo to i/c hose has a slight kink in it, and i also think my bpv finally crapped out on me. i think its stuck open.

does anybody know a bpv that fits the slanted style i/c and pipe, i.e. one that is straight through like the stock one?

-jim

boostjunkie · Post by **boostjunkie** » Mon Apr 12, 2004 2:04 pm

impostor wrote:for now my fuel injectors and pump are stock. injectors are running 80% idc. the pump is getting replaced in a few days. i havent driven it hard, cause the turbo's not broken in yet. it feels slower right now, i think due to the fact that my temporary turbo to i/c hose has a slight kink in it, and i also think my bpv finally crapped out on me. i think its stuck open.

does anybody know a bpv that fits the slanted style i/c and pipe, i.e. one that is straight through like the stock one?

-jim

I was running 100%IDCs at anything over 12psi with a walbro 255lph pump and stock injectors. Here's a bov that you'd be looking for. It's a little bling for my taste, but it utilizes the stock design with a piston instead of diaphragm. There are some dealers for Forge products in the us, but you'll have to search for them:

http://www.forgemotorsport.co.uk/produc ... =FMDVS013B

I was told, however, that the stock bov can accomodate up to 20psi

LegacyT · Post by **LegacyT** » Mon Apr 12, 2004 11:34 pm

wow 107 pounds for an aftermarket replacment

!!! You can prolly order one from subaru for much cheaper.

Mark,

impostor · Post by **impostor** » Tue Apr 13, 2004 3:21 am

LegacyT wrote:wow 107 pounds for an aftermarket replacment !!!

Yes, WOW! With VAT it is 128 pounds=$235 US w/o shipping! I think I'll stick with the stocker for now.

Has anyone had luck with an atmo venting bov, i.e. maintaing a good idle? Im not worried about running rich between shifts because, well, I have an automatic

-Jim

vrg3 · Post by **vrg3** » Tue Apr 13, 2004 3:28 am

Just a thought -- if you think your valve is unable to flow enough, maybe you could put two in parallel?

Also, have you tried just cleaning your stock valve out?

rsstiboy · Post by **rsstiboy** » Tue Apr 13, 2004 1:11 pm

the stock ones leak anyways, i'll be getting a AVO one thankyou, much cheaper than that british one!!

TDGKORN · Post by **TDGKORN** » Wed Apr 28, 2004 4:04 pm

Good luck finding a new stock bov, I tried a few months ago when mine went out and the subaru guy said he could only find one in the entire u.s. database. they wanted like 150bucks plus 20 bucks shipping.
I bought a forged dvr in black and I love it. They sell them here...
http://www.forgemotorsport.com/valves.a ... duct=FMDVR

morgie · Post by **morgie** » Wed Apr 28, 2004 4:55 pm

i still have the ej22t stock BOV , i also have a stock STI V3 BOV ..

they are for sell if you want them... not expensive

vrg3 · Post by **vrg3** » Wed Apr 28, 2004 5:27 pm

If you're willing to do a little adapting, Bosch BOVs are plentiful and function just like our stock ones. You should be able to get them new from Saab or Porsche dealerships, or used on eBay. They have the inlet and outlet at 90 degrees from one another and the fittings are for 22mm hose rather than 19mm hose.

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TD05 installed, now I have compressor surge

TD05 installed, now I have compressor surge