BOV's

[gsxtasee]

My friends dad has a S13 w/ JDM front clip and he wants to vent to atmosphere. what do you need and how do you do it on a SR20DET?

I know this has been covered before but I am a DSM guy just trying to help out my friend. I know venting it out sounds ricer but the thing is putting down good power and the guy wants it to go"whoosh" so... anybody feel like helping me? TIA

Jason

[I H8 UR DSM]

Its usually good to consider a S-AFC if your going to go atmospheric because the car will run rich and tend to stall between shifts

[240_Keyy]

mine is venting and I haven't had any problems yet. It shoots cool a$$ fireballs when I shift too

(BTW: I have only put about 50 miles on the car with the SR in it...)

[I H8 UR DSM]

running rich isnt very good for your motor man

[240_Keyy]

true, but the S-AFC will be on the way here shortly, so it is all good. Do ya'll have any left?

[I H8 UR DSM]

2 i believe : )

[S13240]

If you're a dsm guy it's the basic concept as on your dsm.

[gsxtasee]

'cept on DSM's we don't vent b/c it causes stumbles/stalls/rich condition and makes you slower and seem like your a ricer-fag who only cares about cosmetics and don't care that it is actually -costing- you performance to sound like that.

Around here, we laugh at those guys and attempt to convince them to route it back in.

Thanks for the replies very much guys and, if you don't mind, I'd like to summarze to ensure I got your messge correct.

you vent out just like a DSM and run the risk of being rich/stuttering on shifts in order to look cool, or you settle with the regular sound you get from an open-element filter and a BOV routed back in...

Thanks for your help.

Jason

[gsxtasee]

My friend has a AFC but is unsure how to make the car run properly. If being rich/lean is the only concern and it will idle/drive fine otherwise, it's not so bad.

[themadscientist]

I have been venting blowoffs on my Nissans for years without issue. During a race it never gets so rich that it stumbles, it will let out a crack but no fireball. It can bog a little on a decel coming off heavy throttle but it's manageable. If you have an SAFC there is a decel correction or HKS has an idling stabilizer.

[Tai Mai Shu]

Well, I have mine set up and it doesn't stuble, however my friend with a 1g DSM has the same BOV and his will stuble big time...I mean it stalls some time, so maybe its manufature, but I dont have a problem, now to answer his question

What you do is tighen the spring on the BOV until it is set where it doesnt open until you let off the gas...as in vacuum, while its on boost, no air should be let out, i need to readjust mine because I uped the boost and now its letting some of the air out. but you get the idea.

[YamaOni]

running rich isnt very good for your motor man

I will take rich over lean any day.

[Ace]

I have been atmosphering my BOV and noticed it would stumble after full throttle, so I bumped up the idle and have seen no problems since. But I am currently working on a plan to recycle the metered air back to the intake. Just need to brainstorm a bit more.:thinker

[SRBURG13]

Weird, when I up the boost and giver, my car idles better when I come to a stop. Its before the full throttle that the car runs like ***.

[S13240]

'cept on DSM's we don't vent b/c it causes stumbles/stalls/rich condition and makes you slower and seem like your a ricer-fag who only cares about cosmetics and don't care that it is actually -costing- you performance to sound like that.

Around here, we laugh at those guys and attempt to convince them to route it back in.

Thanks for the replies very much guys and, if you don't mind, I'd like to summarze to ensure I got your messge correct.

you vent out just like a DSM and run the risk of being rich/stuttering on shifts in order to look cool, or you settle with the regular sound you get from an open-element filter and a BOV routed back in...

Thanks for your help.

Jason

Around here? I also live in southern california and see lots of dsms 1st gens and 2nd gens Eclipse/Talons venting their bovs all the time. Venting doesn't mean you're a ricer-fag...venting is just venting! 95% of all turbocharged cars vent if they have an aftermarket bov.

[gsxtasee]

Around here? I also live in southern california and see lots of dsms 1st gens and 2nd gens Eclipse/Talons venting their bovs all the time. Venting doesn't mean you're a ricer-fag...venting is just venting! 95% of all turbocharged cars vent if they have an aftermarket bov.

I gues it depends on where you're out and who you run with. when I do hang out or talk to other DSM'ers it's at a real shop (RRE or RSE) and we don't do venting out unless you have A: stand alone, or B: VPC otherwise, it is for rice effect and creates negative cool points. but yeah, chicks dig it

My friend already trid tightening up the BOV and I have an old-skool AFC so I don't know about the Decel function of the newer style AFC's. He asked about that but I couldn't help on that one.

and thank you all for your input. I appreciaet it very much. I will try to apply what I have read hear and hope his car works out.

Jason

[toy turbo 2]

my MR2 ran richer then hell stock and was even worse once i got the BOV but it spooled quicker after shifts, its all a trade off.

then again this was only on my *** dyno.

[I H8 UR DSM]

I will take rich over lean any day.

Good for you...fry your rings

[hokiruu]

Great thread topic! I need to know more about this. I received my s14 SR and Blitz FMIC last week, and was planning on buying a Dual Drive BOV for it and raising max boost to around 12-14 psi. I was not planning on buying an SAFC until later. This will be my daily driver, so I need it to be reliable/streetable. Therefore I have a few questions:Will the Atmospheric BOV really be such a hassle and that dangerous for my engine?

If so and I decide to recirculate, will I still be able to easily use the stock recirculating valve with the Blitz FMIC?

If I do buy an SAFC, will I be able to easily/permanently solve the a/f, idle, and drivability problems?

My friend who used to race WRXs (ran high 12s) and was offerd a job @TurboXS (didn't take it) said the Blitz BOV did not work very well. He did say that other brand valves (yes, he did say TurboXS-NOT being an employee) may work better. Any opinions?

[240_Keyy]

1. Not really2. No, just run some type of hose from the BOV opening back to the intake tract after the MAFS and before the turbo3. Yes, for the most part if you can get someone to tune it4. The Blitz BOV is pretty decent, everyone has their own opinions though, just do more research...

[hokiruu]

Thanks Keyy. Still trying to decide... everyone says different things. I guess I'll just have to try for myself.

[190hpkilla]

what exctly is "atmosphering BOV" Can I use some kind of BOV. In stock form is SR waste air rerouted like it is in the VW 1.8T or it comes with a stock BOV???

I know that on the 1.8T the BOV is not needed.

what about the sr20det. evey site recomends one for some reason. plese help.

[gsxtasee]

the 1.8 VW guys are just retards. they think they just found boost and it's the newest thing since apple computers and Betamax videos.

BOV/diverter valve (what the VW guys call it) do the same thing. the VW guys differentiate by saying "well..the DV vents back in and the BOV doesn't." the DSM guys call anything that operates like that a BOV and you can choose to vent in or out.

BTW, I have a '02 GTI 1.8t w/ intake/exhaust/dp/sway bars/stru bar/chip/afpr/bov....etc. I also have a '91 Galant VR4 runs low 12's... and a '03 turbo diesel truck (runs high 17's :-)