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Discussion Starter #1
ok i wanted to start this topic becuz i wanted to get this off my chest...i dont kno which one to pick between these three bov.....ive heard the turbo xs and blitz but havent heard the greddy...i liked the way both of them sounded..but i wanted to know what everyone's thoughts were before i make a choice...thankx

charlie
 

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Go Greddy. I heard one on highly modified MKIII last summer (Trey's) and it sounds very synthesized not unlike the F&F BOV sounds. Not that I like a F&F sound but it makes people think, WTF? :) Can't wait till mine gets arrives sometime this week!
 

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get the greddy. the turbo xs is a piston type and is slow reacting and also has a very slight leak even when operating perfectly due to the design. i have heard the blitz and have a greddy. the greddy has a bigger valve from what i can tell so will flow more air. plus if you want it to be loud, it is.
william
 

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I have the Turbo XS and I like it. It does seem be louder than some of the others.
 

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re: BOVs

Well, I can't comment from experience, but from the research I have done I will most likely go with an Apexi unit. Initially I wanted the HKS SSQV. It looks cool and operates at both low and high blow off pressures. Problem is, seems alot of people have trouble tuning it, thus it can leak at low pressures if not set up right. Also from what some say, it sounds kinda weird when blowing off pressure? So after a little more research, the Apexi unit caught my eye. It's affordable, compaired to it's competitors. And it also has provisions for low and high blow off pressures. It looks kinda funny, but as long as it works as advertised I'll be happy.

Sonny
 

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Discussion Starter #6
muchbzy: how do you like the turbo xs? does it leak as i have been told?

williamb2: do you have ur's recirculated back into the turbo inlet hose? how does that still sound when it is recirculated?

charlie
 

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oldschool85 said:
muchbzy: how do you like the turbo xs? does it leak as i have been told?

williamb2: do you have ur's recirculated back into the turbo inlet hose? how does that still sound when it is recirculated?

charlie
I don't think mine leaks. I haven't had any problems with my unit.
 

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the turbo xs does leak, it is impossible for it not too. however the leak is so slight it doesnt cause any problems. if you take it off and try to blow through the end that mounts to the car, you will here a slight hiss as air escapes. you'll have to blow hard but it does leak. however, due to the design, it is also the slowest responding unit, and under higher boost pressures you will hear it "flutter"

as for my greddy bov, it is not recirculated back to the intake, no need to. when you let off the throttle to shift, the computer cuts fuel, so this bs about running rich while shifting is just ignorant, plus even if it did, thats what, maybe 0.25-0.5 sec that its running rich? give me a break. the only real benifit to recirculating it is to help keep the turbo spooled between shifts, and again, you shift so fast when you run the engine hard it really has no effect. in order for it to run enough air through to make a difference you would have to be downshifting to slow down, and if your doing that your most likely trying to slow down or stop so it doesnt mater if the turbo ends up spinning a couple rpms faster. also, the sound it emits when vented to the atmosphere is great and scares alot of people. i let eric borrow it to go to the races a couple weeks ago, and after hearing it, no one would race him. plus, when you want to egg someone on on the interstate with no traffic, nothing grabs attn like a bov venting to atmosphere.
william
 

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Discussion Starter #9
william....how much boost are you running on the greddy type s, bc i only tend to run up to 15psi for now on 295cc...also where did you buy the unit from? did you buy it with the pipe or did you have a custom pipe made?
 

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i bought it off of ebay. the most boost i had run until my 84 was wrecked was 12psi. never got to go to the track at that much boost. i made a flange on a custom pipe. however i have a kit for a mkiii/mkiv. it has a barb like the 3000 pipe and a bracket to mount it under the hood. just run a hose from the 3000 pipe to the bov kit, then run a vacum line, block the stock bov hole in the acordian hose and then your set. if your interested lmk. $160+ shipping for the kit. i have to save some more money to buy a new mkii for my 7mgte swap. ill see if i can find a pic online that shows the kit installed in a mkiv.

http://nopionline.com/index.cfm?fuseaction=dsppartdetail&vmakeid=420&vmodelid=120&vcatyear=1994&vnopinum=345+0030&vTitle=1994 TOYOTA Supra Turbo/Nitrous/High Performance Blow Off Valve&vaffid=0

william
 

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Discussion Starter #11
hey if you can find the pix lmk because i want to see it real bad...in need of a good bov too....does that include the pipe to go with it?
 

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the bov kit doesnt require the pipe, but if you need a mkiii 3000 pipe to go across the engine i have a couple extra and can send you one with it at no extra cost. ill post a link to the pic as soon as i find one.
william
 

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Discussion Starter #13
so what ur telling me is that you hooked that greddy bov to the stock bov fittin on the 3000 pipe with a hose connecting it right? where did you route the vacuum line from the bov to then? intake manifold??
 

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yes, it can be hooked up that way, thats how it was hooked up on erics car. the vacum line comes from the vacum port for the stock bov if its a 7mgte, if its a 5mgte, just t off of a 1/4in vacum line coming out of the intake manifold.
william
 

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Discussion Starter #15
ok ok i like it that way...no need to waste money on making a pipe with it welded on...keep me updated about the pix

charlie
 

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HKS...my friends and i have had no trouble. The turbo xs does not have proper technology for hight boost and is not great. My friends greddy was impossible to tune and had a leak and i have not heard anything about blitz because few people have them around me.
 

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MK2 Fan said:
The turbo xs does not have proper technology for hight boost and is not great.
Thats funny, I read quite the opposite in a few articles.
One example is Mike crawfords Mopar Performance drag SRT-4. His tuner Daryll cox claims that the turbo xs bov was the only one that could hold all the boost that they're throwing at it. He says "Its the most basic BOV we could find, but it was the only one that didnt leak." And thats holding something in the range of 30-40 psi of boost. They are in no way affiliated with turbo xs. Yes it is low tech compared to some of the others available on the market....But does that necessarily mean that its not good?

You can clearly see it in this pic.


Sometimes its the simple things that work best.
 

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Discussion Starter #18
if this is true then can someone else chime in and elaborate about all this fuss about the turbo xs not holding up high boost and leaking...remember i only tend to run up to 15 psi
 

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Like I said, no problems. I'm running 9 or so lbs or boost.
 

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When I had my 91 mkIIIT, I had TurboXS BOV and TurboXS manual boost control. No problems with either unit. I dialed in about 11 lbs of boost and ran that way for about a year before selling the car and getting back into mkIIs.
 
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