I want opinions on overall performance, sound, and looks. I have the choice of any of these three for the same price ($150 used, all including flanges and pipings).

What do you guys have, and what do you like? It's going to be on my ZC @ 7psi, so I want something that's good @ low/medium boost. Also, if you have any pics of yours POST THEM.

jB

 

if you get a used blitz valve, make sure it is the newer model.

The type s is purple.

 

Both the Blitz and Greddy BOV's can leak. The HKS however cannot, based on it's design. Also, the HKS sounds very cool. Like a loud high pitched chirp.

 

The HKS performs the best overall but they are all 3 very good bov's. Depending on what you want your car to sound like get the the one with a sound you like i know someone has the link to that webpage with all the recourdings of diffrent bov's.

 

EEEGGGGHHHHHHHHH!!!!!!!!!!! WRONG!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
plain and simple. THE HKS is the one that LEAKS!!!!!!!!!! ask DEE(and many others)
i loike the blitz "sound" the best but i do have a greddy type s which is pretty good too!

 

ROFL, 2's across the board.

Ok, so which one is the one with the special design. I thought it was the HKS too; and I did like its sound. I like the Type-S though b/c it's adjustable; and the one I am looking at is annodized red and not the purple color. I heard Blitz was another good one though so I included it.

Lets get some mo opinions.

Anyone got any pics of theirs in their engine bays?

jB

 

I love my blitz but i want to try the others .... specialy the greddy for some reason.

 

How about this one?

No ghey purple haze crap here, we got wrinkle type r red



This is one of the ones I have a choice of buying, and I think it's the one I want.

jB

 

2K_TEG gave me this great link, listen to all the sound bytes and vid clips at the bottom!

http://www.alltrac.net/tuning/blowoffvalve.html

 

The HKS SQ and SQV are the most leak prone BOV's on the market because of the C-Clip retainer. The standard style HKS racing BOV is a much better choice and it uses the same flange as Greddy. That reverse push-pull crap is as about as usefull as basketball cleats on a Ballerina. Rating BOV's by their sound is straight up rice-ology!

 

well my friend runs hks ss on his supra and no sign of leaks, he is runing 2 bov's btw... it seems like the most chosen bov for supra's is the blitz so i would deffinately go with them.. and the things that leak the most are them turboxs ones..

 

If you want a BOV that makes a lot of noise and will be used forever on a 7psi setup then get whatever scares old ladies. If you want a BOV that will prtect you from compressor surge and will not leak get one that has a large valve and a simple design with straight thru flow.

The HKS leaking C-Clip problem is well known over here (has been for atleast 8 years).

 

then go with blitz, never heard of anyone saying they leak and they perform well..

 

Im so so so happy I chose GReddy Type-S over HKS SS...Both function well, and I know a guy who works at HKS USA, and he himself, admits that sometimes HKS SS BOVs WILL leak..or put you at a stall when you come to a light...It is a great "looking" BOV, and good sounding, but I'm sure all BOV's have weaknesses. GReddy's weakness is being purple I think..hehe..Kinda girlish...but hey, if the boot fits right? All I'm saying is GReddy Type-S IMO, is better than HKS or Blitz, especially the older plastic blitz..

GReddy Type-S - Performance, sound, looks....2 's up!

 

I have the turboxs H-RFL and its da bomb, its so quiet in normal driving that you never hear it, and unless the boost goes over 5psi is totally silent. but over 9psi and its supa loud and sounds great, no girl screches here!!! just the PPHHHHHHSSSS

 

i agree-i went with the HKS SSQV instead for my future turbo installation after i read their product info...

HKS says:

"The HKS Super Sequential Blowoff Valve (SSQV) is a dual stage pull type relief valve. Unlike other blow off valves that are push type, the SSQV will not leak under high boost conditions nor under vacuum at idle. Being of a pull type valve structure, the SSQV cannot physically leak under any level of boost because boost pressure also keeps the valve closed against its seat. The SSQV is actuated by pressure alterations only, not by the rate of pressure or vacuum in the line, which ensures a quick valve response and complete closure during idle. On typical blow-off valve designs, a large valve is utilized in order to accommodate high boost / high horsepower applications. However, these large valves tend to react slowly and require high activation pressure to open, therefore are not able to activate and prevent compressor surge at light-load conditions. On the other hand, smaller, fast reacting valves do not discharge the airflow capacity required for high horsepower applications and tend to creep open and leak as the boost pressure overpowers the spring on these push type valves. For maximum performance, the HKS SSQV incorporates both a small primary valve for ultra quick activation, along with a larger secondary valve for additional discharge capacity. The SSQV is engineered to initially open the small primary valve at light throttle and load conditions, then sequentially opens the secondary valve for additional relief capacity under high boost and load conditions. The SSQV is constructed of polished billet aluminum, which ensures long-term durability and visual appeal. The mounting base utilizes a circular mounting flange that provides exception flow and complete secure mounting via a C-clip snap ring and O-ring gasket. The triple-fin discharge port design produces a powerful and unique aggressive blow-off sound along with added visual distinction. The HKS SSQV is available as a universal unit for custom applications and also by vehicle specific kits for bolt-on applications. Vehicle specific HKS SSQV kits come complete with all needed mounting flanges, brackets, and miscellaneous hardware for a bolt-on installation. For Universal SSQV applications, weld-on flanges are available in steel and aluminum for custom installation.

GReddy says:

"Turbo lag is the enemy of any turbocharged vehicle. Our Blow Off Valves are easily adjustable to prevent both premature boost leakage and compressor surge. Each is made of durable cast and billet aluminum frame, and the valve to diapharm ratio provide preformance that cheep piston types can not offer. The spring stiffness adjustment screw and the two different sizes give the GReddy user the option to match vehicles with mild upgrades to heavily tuned engines. Also available in easy to install kit form for most Japanese turbocharged vehicles."

 

If you talk to an actual HKS tech you will find out that the over engineered SQV still has the leaking C-clip retainer that plagued the SS for years. For atleast 8 years I have been watching people chunk the SS and SQV because of it's leaking c-clip design.

 

Of course HKS is going to say it is the best.

 

i had the HKS SS, got rid of it and got Greddy Type S, MUCH BETTER

 

Greddy type-s and blitz are really good.I wanted the blitz but got a greddy instead because in was in stock. Don't get the hks ssq bov it may look nice but the sound it makes isn't as pleasing or not a clean sound thus the reason why it is sequential.

 

which is good at moderate boost?
How come nobody gets the Greddy Type-R?

 

I use a Greddy Type R on my 11psi setup. It took a week of fiddling to get it setup right since I have the race spring (14psi).

 

u guys have any opinions on the Apex i bov?

 

OK GUYS....Now I'm completely confused..I hear so much on both sides of the spectrum for the HKS SSBV. Which one is correct? Is it a good product or not? I'll be running 17psi with my setup...I DON'T CARE about sound...Which bov should I get that won't leak...Or do they all have a chance of leaking..Is it just that there is no PERFECT bov?

 

I had the HKS SS that came with my DRAG 3 kit, You could only hear it at 5000rpm or above on my T3/T4.
I now changed to the GREDDY type S and I like it better. you can hear it at 3000rpm or above.