Page 1 of 1
How much performance can the OEM Bypass Valve handle?
Posted: Thu Dec 08, 2005 6:45 am
by Subtle
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
Posted: Thu Dec 08, 2005 6:54 am
by dzx
TDO5H-16G? If you have a front mount, you might as well go to a bov. Greddy's bov can be recirculated.
Posted: Thu Dec 08, 2005 7:07 am
by Subtle
The current install is tidy and I prefer the recycle over the vent to the atmosphere type of valve.
Posted: Thu Dec 08, 2005 7:13 am
by Subtle
What makes up the class 4 mods?
Posted: Thu Dec 08, 2005 8:00 am
by 555BCTurbo
I was running 19psi with a stock BPV, and it worked fine...
Posted: Thu Dec 08, 2005 3:37 pm
by vrg3
I found it easier to fit a cheaply available Bosch BPV with my 16G than to try to make the OEM valve fit.
Posted: Thu Dec 08, 2005 5:02 pm
by wiscon_mark
A member on SL-i modified a WRX Bypass Valve so it could take 24psi, I believe.
His username is Xcntrk75
Posted: Thu Dec 08, 2005 5:29 pm
by BAC5.2
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.
Posted: Thu Dec 08, 2005 5:57 pm
by wiscon_mark
I thought he beefed up the spring...
Posted: Thu Dec 08, 2005 9:15 pm
by georryan
555BCTurbo wrote:I was running 19psi with a stock BPV, and it worked fine...
Are you running any other engine management (ecu/piggyback/injectors)?
Posted: Fri Dec 09, 2005 1:22 am
by Subtle
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.
Posted: Sat Dec 10, 2005 6:53 am
by azn2nr
my stock bpv on a fmic and 16g couldnt vent the air qick enough. lots of surge. holding was not a problem
Posted: Sat Dec 10, 2005 7:31 pm
by Subtle
BAC5.2
What ecu are you using
Thanks------- Bob
Posted: Mon Dec 12, 2005 7:39 am
by White Out
I am not sure if they use the same recirc valve, but my crushed oem held on the STi to 24psi.
Nick
Posted: Mon Dec 12, 2005 4:50 pm
by 93Leg-c
What does the term "crushed" mean?
Posted: Tue Dec 13, 2005 2:38 am
by dzx
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.
Posted: Tue Dec 13, 2005 3:59 am
by Legacy777
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.
Posted: Tue Dec 13, 2005 4:07 am
by dzx
stage x, i like it. lol
Posted: Tue Dec 13, 2005 4:14 am
by bmxpunk
hahaha
dzx you have a stage 10 leggy!?!?!?!?!?
HAHAHAHA just kidding. roman numerals rule!!
agreed on not liking the stages though.
Posted: Tue Dec 13, 2005 4:19 am
by Legacy777
I was meaning X as in a variable
Posted: Tue Dec 13, 2005 4:23 am
by bmxpunk
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
Posted: Tue Dec 13, 2005 10:33 pm
by Subtle
OK--the suspense is killing me.
What's a "crushed" bpv
Posted: Tue Dec 13, 2005 10:37 pm
by bmxpunk
you crush the top of it inorder to add preload to the spring, making it feel stiffer
Posted: Thu Dec 15, 2005 7:35 pm
by BAC5.2
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.
Posted: Fri Dec 16, 2005 12:29 pm
by supermoose
crush bov?
trick from the DSM guys. put bov in vise, ups the spring rate. duno personally, never done it.