Greddy Type RS or HKS SSQV???

[caall99]

Hey everyone,

I am piecing together the final parts for my SR20DET redtop swap. I am trying to decide in between these two blow off valves. I know alot of hotpipes have flanges prewelded on them, for either Greddy or HKS blow off valves. I am not sure which BOV would work on the SR20DET in atmospheric dump mode without stalling the engine or creating a hesitation. The HKS unit sounds like shit to me but seems to have the higher technology valving system (two valves etc..) I believe both have the option of recirculation v.s. blowing off to the atmosphere, in case either give me a problem I can always change to recirculating in the future.

Also, I am interested in buying an HKS style or Greddy style BOV off of ebay, to save some money. Is this just plain stupid or should I give ebay some trust? Take a look at this HKS SSQV knock off, it looks pretty damn good:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=72205&item=7976995620&rd=1

supposedly they improved on the HKS design?!

so to recap,
Greddy Type RS or HKS SSQV

and if either of those, should I go the ebay route and get a "brand style" BOV?

Thanks guys, excited to hear your responses so I can finally order my BOV! :boink:

[vinhisbored]

havnt heard of anyone having the knock-off, but it's all on you. i dont know how it performs, but my friend has the HSK SSQ BOV, and it sounds sick as hell.

[caall99]

i am not really a fan of the "turkey slaughter" sound, but if it performs better than the greddy type rs on a MAF equipped car then it might be the way to go.

[llteddy4playll]

I have the rs and i love it. If you dont have an safc it will stall. But i love the sound over the hks. My friend has the hks and im sick of the sound after awhile. But the hks doesnt stall. The rs doesnt have the recirculation kit yet.

[ghostuss]

I dig the turky slaughter sound. It's sick!! So old school. :rofl:

[dunno]

Don't buy an eBay knockoff, you will regret it. The HKS SSQV will outperform and outlast the GReddy, but most people prefer the sound of the type RS. With either valve with the BOV vented to the atmosphere, you will have problems with idle, but significantly more noticeable ones with the RS. If you want to run open BOV, I'd suggest a piggyback fuel management system (e.g. APEXi SAFC).

-Matt

[Rezlo]

I use the type RS to atmosphere and i just tightend it up just a little so it doesnt leak, at .03 bar it lets off and flutters and anything higher its sounds awsome

I have the S-afc but i dont even use the settings to stop stall, the only time it tries to stall is if i take off in first in high boost to 1bar then stick the clutch in and coast to a stop, but how often you do that?

[DrtyRat]

i have the hks and it's a sick blowoff valve but you will definitely stall if you don't recirculate it.

[wutangben]

I have a GReddy Type-S, and it performs great after recirculating it. the GReddy BOV's are easy to recirculate, all you need to do is go to autozone and look at their hoses. Find one that fits, clamp one end onto the bov, the other end onto your intake. Made the biggest difference in the world.

[vsiev]

I have the hks ssqv and i don't have any problems with idle. Doesn't even bogg down under 800rpm. I don't even have a safc or any fuel management system.

[Rezlo]

If your bov is making your car stall that much its set to loose, even the stock BOV to atmosphere on my SR20 only made it stall periodiacaly and had zero idle problems, only hell of an anoying thing was letting off gentle at high RPM in 4th or 5th it would buck a lil,

If your bov is set right it should only stall your car if you boost up real hard and stick the clutch in and let the RPMS drop fast, or at ultra high RPM when letting off youll feel a slight buck as it goes rich from lost air threw the meter.

Remember BOV is there for a reason not just to sound nice, set to soft will kill your performance as bad if not worse than one that is set to hard, when I did some work for turbonetics they told me only after .05psi of boost should it release when you lift the gas fast,

All what ive just said applies to atmosphere bov's working with MAFS

[caall99]

thanks for ur responses. one last question: why is it that the HKS unit on our car does not cause stalling or hesitation, but the greddy (or anyother bov for that matter) does??? :-/

oh and Rezlo, are u sure u didn't mean .5 psi, v.s. .05 psi?

[s14turbosilvia]

it has something to do with the two-way valve inside the HKS unit, where it doesn't move under vacum (idle). I suck at explaining right now. Sorry.

[ZK]

Why would you want a BOV and then set it to recirculate? Wouldn't it pretty much be doing the same thing as the stock purge valve then? Why spend money to change something that works?

[caall99]

sometimes i ask myself the same question. One reason is that i want all metal construction that seals better, and uses more advanced technology like the HKS two valve system. Stockers cannot last against elevated boost levels. on my old supra turbo i destroyed two stock valves running only 4 psi over stock. that thing was fast...

[JDMs13]

Sweet. Which blow off valve should I buy for my car?

How is it that threads like this get so many replies....

[AenjukuCar]

I have the HKS super Seq. It's awesome. Mine is on the cold side just about a foot and some change from the intake manifold. There is actually a tube running from the intercooler piping to the B.O.V. My blow off valve is sitting actually off the pipping, a piece of thick rubber hose, connects it from the intercooler pipping too the blow off valve. I didnt do it, but i dont know why they did that.

[caall99]

hey JDMs13,

stop bashing my thread, and let me bask in my glory of starting a somewhat substantial thread :naughtyd: . my last two threads got like one or two responses each.

now tell me which BOV to buy, so i can get it over with. oh and also 240sxmotoring.com, heavythrottle.com and enjukuracing.com have run out of hot pipes with prewelded flanges for either the greddy bov or the hks bov. if anyone knows where else i can get a hotpipe please let me know.

thanks

[JDMs13]

Go to a local welding shop and have them weld a flange on for you, wherever you want. Buy whatever blow off your little heart desires, I recommend you dont buy one period. Raw dawg that shit.

It must feel damn good to get so many replies though, Its your lucky day.

Greg

[mbmbmb23]

Try the knockoff.....if you dont like it just re-sell it on the forums. It looks decent to me and if you dont like the sound just buy the other inserts from HKS to change the sound pitch....Im sure the real HKS inserts will fit in the knockoff.


-m

[caall99]

because it is my lucky day, i am gonna stop being an indecisive bitch and get the HKS knock off. Supposedly its better than the actual HKS SSQV in reliability and longevity. but i still have the problem of finding a hotpipe with a HKS flange prewelded. i don't have the guts to weld thin aluminum, and i don't even trust myself telling a welding shop what to do. if anyone is still interested in posting on this thread please let me know of an online store at which i can order one (besides the three i have allready posted, because they are currently out of stock). thanks guys for making this day so memorable to me :jerkit: haha, just kidding

[s14turbosilvia]

check out www.projectnissan.com
oh, i have an increadible welder that i'm having do mine (years ago, he welded my shifter back together after I broke it, and it was SOLID). If you want to ship it to me, I can have him weld it, and I can also run a CNC program on the flange that cuts the radius of the pipe into the flange neck to help flow through the hotpipe. I can take pictures of what I did to mine. I could probably get him to do it for a few bucks and a few buck shipping on top of that. just an idea, trying to hlep ya out.

[turbozxi]

I would get the RS have heard some bad things about the HKS bov. On honda-tech.com they have them going pretty cheap to. As rezlo said running these BOV's to atmosphere doesn't cause any real problems maybe the odd backfire when shifting... :fart:

[Rezlo]

I ment .05 bar not psi.

The RS and HKS will perform neer identicaly if they are both set right to atmosphere, it all depends on which sound you like more, the strangled turkey or a whooosh.

Ive got some video of my 200sx with the type RS, ill see if i can upload it off the DVC to my laptop, at .05 to .3 bar it flutters, .3 to .6 got a pretty nice sound, after .6 it gets pretty loud and releases real fast due to its dual spring rate technology, I think i paid $140 for mine brand new on ebay.