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Old 30 Jul 2004, 10:22 PM   #1 (permalink)
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I know (BOV)

I know i know, this thread has been done before :shock:

BUT, what should i go for and why? A HKS Sequential or Blitz BOV?

Whats the loudest and will i like it that loud? :P

Help is required,

All the best
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Old 30 Jul 2004, 11:11 PM   #2 (permalink)
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Gareth - I have heard both of these Dumpers in action and they are both quite different in sound. One thing I have definitely noticed is that they do sounds very different if you are running an induction kit with the VTA.

The HKS is very loud and gives a LOUD WHOOOOSH when dumping anything below 4500rpm....if you are go over this rpm then you get more of a slight shoosh and Chirp sound when changing up. My brother has the HKS on his Evo with an induction kit and his chirps and flutters (like the WRC sound a bit). The thing is the Blitz makes a similar sound but not as loud it has a slightly lower tone What I have worked out is that both of these dumpers make a whoosh sound with an Airbox in place but give a much more pleasing wastegate chatter when using an induction cone The HKS also uses a pull relief system within the valve which is supposed to stop uneven idle etc. I hoep this helps mate ?
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Old 30 Jul 2004, 11:14 PM   #3 (permalink)
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Helps greatly Nelson.... Thanks m8 :wink:
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Old 30 Jul 2004, 11:19 PM   #4 (permalink)
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Oh yea and forgot to mention that the HKS has an insert which can be changed to give a different sound and the Blitz has different trumpets which can be attached again to give different sounds

I think the HKS seems to be the top tuners favourite but either of these Dumpers are gonna be top quality
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Old 30 Jul 2004, 11:44 PM   #5 (permalink)
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Thanks Nelson, Just sorted the HKS out now... Need to hear that sound :P

Fitting help required next :wink:

All the best
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Old 30 Jul 2004, 11:47 PM   #6 (permalink)
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How do these compare to the Forge Motorsport Dump Valves? Anyone? 8)
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Old 31 Jul 2004, 09:47 AM   #7 (permalink)
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TZ - I did have a Forge Dumper fitted for all of 2 weeks I personally couldn't get on with it and some running probs too However having sold it on I soon found out that they do s shims/spring kit for the valve whcih apparently sorts this problem

You would be better off asking Newie about this as he has a Forge fitted and fitted the new spring kit I would have to say that the HKS is in a different league when it comes to build quality but that is why its double the price in the UK.......however if you contact Simon Lau on here he can get a HKS SQV for a few pounds more than a Forge unit
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Old 31 Jul 2004, 10:05 AM   #8 (permalink)
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Anybody got pics of how / where to fit :shock: --- I think another thread convinced me it was something i can do myself?
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Old 31 Jul 2004, 10:09 AM   #9 (permalink)
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Gareth - believe me it will be something you can do yourself nothing is removed. AFAIK the dump valve on your current WRX is similar in design to mine as in it bolts directly to the intercooler ?? The HKS kit has an adaptor that bolts where your curent dump valve sits and this allows a pipe to connect the SQV to the adaptor...I am however talking about the Classic MY99/00 fit ops: Maybe Simon Lau can jump in here and advise you
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Old 31 Jul 2004, 11:50 AM   #10 (permalink)
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Ok ill have a look and take a few pics so we can all see
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Old 03 Aug 2004, 10:44 AM   #11 (permalink)
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Take a look at this one we can get stateside:

http://www.worxtuning.com/

Go to the products secion and look at the blow-off valves.

It can adjust from 100% recirculating to 100% atmospheric. It is the current favorite on Nasioc.
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Old 03 Aug 2004, 11:06 AM   #12 (permalink)
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Looks good that brizey, nice find
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