Blow off valve testing, it really works!
Newbie
Joined: Jan 2004
Posts: 19
Likes: 0
From: texas
I am leareing all that i can about the Diffrerent components of my car. My question is if I buy a Bov w/recirc. there will not be the noise which i do so love to hear? also just how much can a non-recirc. Bov hurt your preformance?
Will the HKS EIDS work well with say the Forge atmospheric BOV? I'm looking for the best of all possible worlds here.
http://www.hksusa.com/products/?id=2175
I'll also be running an SAFC-II, recommendations for idle? If I run it -10% at 800-1400rpm will that help keep the car running smoothly? I don't want to be that jack *** that rev's his car and kills the engine.
Also, I take it the Atmospheric BOV's are going to vent at whatever point you let off the gas. Is that something that I should take into accont on the SAFCII?
Ex. I rev to 6000 at a stoplight, let off the gas, BOV probably isn't going to pop the split second that I let off the gas, its probably going to dump in the mid to high 5k range. So if I set a slightly leaner point at that rpm range will that help work around that rich MAF reading? I've also read several posts about a lean spot created in the 4-5k range by aftermarket induction--will that actually help me in this instance with a BOV?
I know I should stick with recirculating, but I like the sound. Its like walking up to a hot stove knowing your going to get burned. I'm looking for an oven mitt.
http://www.hksusa.com/products/?id=2175
I'll also be running an SAFC-II, recommendations for idle? If I run it -10% at 800-1400rpm will that help keep the car running smoothly? I don't want to be that jack *** that rev's his car and kills the engine.
Also, I take it the Atmospheric BOV's are going to vent at whatever point you let off the gas. Is that something that I should take into accont on the SAFCII?
Ex. I rev to 6000 at a stoplight, let off the gas, BOV probably isn't going to pop the split second that I let off the gas, its probably going to dump in the mid to high 5k range. So if I set a slightly leaner point at that rpm range will that help work around that rich MAF reading? I've also read several posts about a lean spot created in the 4-5k range by aftermarket induction--will that actually help me in this instance with a BOV?
I know I should stick with recirculating, but I like the sound. Its like walking up to a hot stove knowing your going to get burned. I'm looking for an oven mitt.
I'm still a newbie to bov's. Can someone explain to me why my revs jump up while shifting? I know it has to do with the bov because it just started when I installed the Greddy type-s. At first I only turned the adjustment screw 3 full turns and it did not happen, but boost was not holding???? So I tried to tighten the screw and now the revs jump up only when getting on it. By the way I still don't hold boost. I have a Greddy profec b spec II so I know I need to mess around with the tuning on that as well. For now my concern is holding boost 20-21 psi and not having the revs jump. Any info would help thanks.
https://www.evolutionm.net/forums/at...chmentid=28286
https://www.evolutionm.net/forums/at...chmentid=28287
Like smogrunner posted what do you think of this setup SILVERSURFER?
Road Race Engineering puts another fitting on the bottom flange and attaches it to the top fitting,I got the same setup and works perfectly....
But funny thing is today I took the valce out and decided to blow through the bottom of the BOV where the piston is and I was surprised to hear that air is going throught the fitting and leaking air through the extraction part of the valve...
The valve has been working perfectly holding boost no problems,but since doing that test as a joke I felt kind of curious how this setup works so good? AS it seems to leak boost to the top fitting?
https://www.evolutionm.net/forums/at...chmentid=28287
Like smogrunner posted what do you think of this setup SILVERSURFER?
Road Race Engineering puts another fitting on the bottom flange and attaches it to the top fitting,I got the same setup and works perfectly....
But funny thing is today I took the valce out and decided to blow through the bottom of the BOV where the piston is and I was surprised to hear that air is going throught the fitting and leaking air through the extraction part of the valve...
The valve has been working perfectly holding boost no problems,but since doing that test as a joke I felt kind of curious how this setup works so good? AS it seems to leak boost to the top fitting?
Originally Posted by DocMortal
https://www.evolutionm.net/forums/at...chmentid=28286
https://www.evolutionm.net/forums/at...chmentid=28287
Like smogrunner posted what do you think of this setup SILVERSURFER?
Road Race Engineering puts another fitting on the bottom flange and attaches it to the top fitting,I got the same setup and works perfectly....
But funny thing is today I took the valce out and decided to blow through the bottom of the BOV where the piston is and I was surprised to hear that air is going throught the fitting and leaking air through the extraction part of the valve...
The valve has been working perfectly holding boost no problems,but since doing that test as a joke I felt kind of curious how this setup works so good? AS it seems to leak boost to the top fitting?
https://www.evolutionm.net/forums/at...chmentid=28287
Like smogrunner posted what do you think of this setup SILVERSURFER?
Road Race Engineering puts another fitting on the bottom flange and attaches it to the top fitting,I got the same setup and works perfectly....
But funny thing is today I took the valce out and decided to blow through the bottom of the BOV where the piston is and I was surprised to hear that air is going throught the fitting and leaking air through the extraction part of the valve...
The valve has been working perfectly holding boost no problems,but since doing that test as a joke I felt kind of curious how this setup works so good? AS it seems to leak boost to the top fitting?
I recently purchased and installed a TurboSmart Dual Port BOV in my Evo. I managed to fit it in place of my stock BOV with all the same connections and hosing. I tried running the car with the BOV turned all the way to soft, but that would make it almost stall, so I turned it towards hard a half-turn. After testing, I found that turning the BOV all the way towards hard got the best reaction from the car; no stalling, but I'm not sure if its leaking. Besides the operation of the BOV, I'm not too happy with the way I fit it in, since it's up against the radiator hose and directly facing the fan. Anyone familiar with my situation?
Newbie
Joined: Sep 2004
Posts: 31
Likes: 0
Hi.. I own an Evolution 8 and im looking for a good BOV.. at the same time trying to learn as much as I can.. and I must say.. from the useful information posted by alot of you.. I've thought about the Greddy Type-S for my next mod. Well.. one of my friends just showed me his Worx BOV that he just recieved for his STi (after alot of research).. really nice piece. He aslo showed me a video of the valve on an STi.. and it had a real nice psshhhhhhh sound to it.. now I just wanted to know if anyone has ever had their own experience with the Worx.. on an Evo 8 (how it sounds/performs.. etc.).. so if anyone has any info on it, please help me out.. I appreciate it
-G
-G
Last edited by EvO WiD StYLeZ; Sep 23, 2004 at 03:15 PM.
I just installed the Worx tuning BOV. At the 2nd softest setting(the way it came) I'm having some issues with rough idle. I switched the setting to the middle harder setting, fixing the idle, but I feel the turbo isn't spooling as fast, but it might be in my head. I'm going to keep messing with it and I'll keep you posted. I'm kind of worried that the mid setting may be too firm and cause damage to the turbo from surge. Is this possible? If anyone knows, it would be a tremendous help.
since i read all 13 pages of thread, and i didnt see this mentioned once, i ask..
what type of BOV do WRC cars use to get the multiple chirp? It seems they let off pressure in stages (3 or 4) in case the driver snaps back on the throttle quickly after letting off, and this would not dissipate all the boost. Anyone know what i mean?
To me this sounds like the setup i'd want, since i often use throttle to adjust my car's road position, and a quick snap on/off is needed. Or it may be moot in an AWD car with 60/40 distribution. okay, okay i like that sound a lot more than psshht.
what type of BOV do WRC cars use to get the multiple chirp? It seems they let off pressure in stages (3 or 4) in case the driver snaps back on the throttle quickly after letting off, and this would not dissipate all the boost. Anyone know what i mean?
To me this sounds like the setup i'd want, since i often use throttle to adjust my car's road position, and a quick snap on/off is needed. Or it may be moot in an AWD car with 60/40 distribution. okay, okay i like that sound a lot more than psshht.
Originally Posted by m3charles
since i read all 13 pages of thread, and i didnt see this mentioned once, i ask..
what type of BOV do WRC cars use to get the multiple chirp? It seems they let off pressure in stages (3 or 4) in case the driver snaps back on the throttle quickly after letting off, and this would not dissipate all the boost. Anyone know what i mean?
To me this sounds like the setup i'd want, since i often use throttle to adjust my car's road position, and a quick snap on/off is needed. Or it may be moot in an AWD car with 60/40 distribution. okay, okay i like that sound a lot more than psshht.
what type of BOV do WRC cars use to get the multiple chirp? It seems they let off pressure in stages (3 or 4) in case the driver snaps back on the throttle quickly after letting off, and this would not dissipate all the boost. Anyone know what i mean?
To me this sounds like the setup i'd want, since i often use throttle to adjust my car's road position, and a quick snap on/off is needed. Or it may be moot in an AWD car with 60/40 distribution. okay, okay i like that sound a lot more than psshht.
1up for silver surfer,
I figured the design on how RRE sells there greddy type s blow off valves is under high boost the fittings from bottom to top pass some boost to the top of the BOV to help it stay closed,this is good in the way you can keep both springs and totally back the adjustment screw out...One could argue that the design also leaks boost in a way....very small amount though
I figured the design on how RRE sells there greddy type s blow off valves is under high boost the fittings from bottom to top pass some boost to the top of the BOV to help it stay closed,this is good in the way you can keep both springs and totally back the adjustment screw out...One could argue that the design also leaks boost in a way....very small amount though
Als
Originally Posted by zstryder
Umm... are you talking about the bang-bang sound? That's ALS, or anti-lag system. It's bad for your turbo - I'd say a turbo a race sounds about right. You probably wouldn't want to do that to your daily driver... as far as I know, I think the WRC Evo ran the stock BOV.
thx 4 the input.