How much performance can the OEM Bypass Valve handle?

Subtle · Post by **Subtle** » Thu Dec 08, 2005 6:45 am

This winter I intend to drop a TD05-16 turbo into my twgn.

It has a fmic, stainless exhaust(3-inch), stand alone SDS ecu, and a built 4eat.

Should I upgrade the bypass valve

dzx · Post by **dzx** » Thu Dec 08, 2005 6:54 am

TDO5H-16G? If you have a front mount, you might as well go to a bov. Greddy's bov can be recirculated.

Subtle · Post by **Subtle** » Thu Dec 08, 2005 7:07 am

The current install is tidy and I prefer the recycle over the vent to the atmosphere type of valve.

Subtle · Post by **Subtle** » Thu Dec 08, 2005 7:13 am

What makes up the class 4 mods?

555BCTurbo · Post by **555BCTurbo** » Thu Dec 08, 2005 8:00 am

I was running 19psi with a stock BPV, and it worked fine...

vrg3 · Post by **vrg3** » Thu Dec 08, 2005 3:37 pm

I found it easier to fit a cheaply available Bosch BPV with my 16G than to try to make the OEM valve fit.

wiscon_mark · Post by **wiscon_mark** » Thu Dec 08, 2005 5:02 pm

A member on SL-i modified a WRX Bypass Valve so it could take 24psi, I believe.

His username is Xcntrk75

BAC5.2 · Post by **BAC5.2** » Thu Dec 08, 2005 5:29 pm

He just crushed it. Lots of people do that.

My stock valve was incapable of handling the air.

I've had various atmospheric BOV's and I can't wait to go back to recirculating.

Most good valves can be recirculated.

wiscon_mark · Post by **wiscon_mark** » Thu Dec 08, 2005 5:57 pm

I thought he beefed up the spring...

georryan · Post by **georryan** » Thu Dec 08, 2005 9:15 pm

555BCTurbo wrote:I was running 19psi with a stock BPV, and it worked fine...

Are you running any other engine management (ecu/piggyback/injectors)?

Subtle · Post by **Subtle** » Fri Dec 09, 2005 1:22 am

Geo

Stand alone SDS ecu, with down loadable wide-band, or whatever it' called.

Profec B controlling the waste gate. Set at 7.5 and 12.

azn2nr · Post by **azn2nr** » Sat Dec 10, 2005 6:53 am

my stock bpv on a fmic and 16g couldnt vent the air qick enough. lots of surge. holding was not a problem

Subtle · Post by **Subtle** » Sat Dec 10, 2005 7:31 pm

BAC5.2

What ecu are you using

Thanks------- Bob

White Out · Post by **White Out** » Mon Dec 12, 2005 7:39 am

I am not sure if they use the same recirc valve, but my crushed oem held on the STi to 24psi.

Nick

93Leg-c · Post by **93Leg-c** » Mon Dec 12, 2005 4:50 pm

What does the term "crushed" mean?

dzx · Post by **dzx** » Tue Dec 13, 2005 2:38 am

Subtle wrote:What makes up the class 4 mods?

Aftermarket turbo kit
Engine management
FMIC
Cams
Fuel system
flywheel and stuff
?

I dunno, but i figure it would qualify for a stage 4 if there was one.

Post by **Legacy777** » Tue Dec 13, 2005 3:59 am

I hate the whole stage terminology....it's such bullshit. It means absolutely nothing. I have stage X from this company....well I have a stage X from another company.....Are all these companies going to get together and say, ok stage 1 has these parts, stage 2 has these parts, etc. Same goes for power increases.....

Anyway...my little rant.

dzx · Post by **dzx** » Tue Dec 13, 2005 4:07 am

stage x, i like it. lol

bmxpunk · Post by **bmxpunk** » Tue Dec 13, 2005 4:14 am

hahaha

dzx you have a stage 10 leggy!?!?!?!?!?

HAHAHAHA just kidding. roman numerals rule!!

agreed on not liking the stages though.

Post by **Legacy777** » Tue Dec 13, 2005 4:19 am

I was meaning X as in a variable

bmxpunk · Post by **bmxpunk** » Tue Dec 13, 2005 4:23 am

I know. i guess i put the just kidding in the wrong spot.

as far a bpv input----my fried is using the leggy one on his rs-t works great 7psi

Subtle · Post by **Subtle** » Tue Dec 13, 2005 10:33 pm

OK--the suspense is killing me.

What's a "crushed" bpv

bmxpunk · Post by **bmxpunk** » Tue Dec 13, 2005 10:37 pm

you crush the top of it inorder to add preload to the spring, making it feel stiffer

BAC5.2 · Post by **BAC5.2** » Thu Dec 15, 2005 7:35 pm

Yep. Can't do it with a stock BPV though.

I wasn't running any engine management to speak of really.

I'll be doing things the right way soon enough though.

supermoose · Post by **supermoose** » Fri Dec 16, 2005 12:29 pm

crush bov?

trick from the DSM guys. put bov in vise, ups the spring rate. duno personally, never done it.

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How much performance can the OEM Bypass Valve handle?

How much performance can the OEM Bypass Valve handle?