I just picked up a used blitz bov. Came with flange for the twins. Put it on, take her for a drive, and.... *waits for nice "pffffsst" sound*.... nothing. Sounds not very different from the stock bov. Any ideas why? Running stock boost I didn't expect a big change, but at least some. It was selling for a good deal so I figured why pass up a low price when I'd be getting on in the near future anyway. With the stock tubing there wasn't a whole lot of option on how/where to put it, so the horn is facing down while it's sitting next to the intake pipe. Would that make a difference? Am I missing some important, very obvious, part of installing it? Any help is much appreciated!

 

that happened to me before and the vaccum hose going from the bov to the intake manifold was kinked when i closed the hood, make sure the hose is not kinked at all..

 

Make sure your spring rate is not set too heavy.

 

sound wise on the blitz its just like the stock one except slightly louder. The HKS ssqv has the loud sharp whissle sound that I think you are looking for.

 

Hmmm... this sucks. My buddy had one on his FC. He did a TII swap and on stock boost it sounded pretty good. Oh well. I'm more concerned with it's practical use down the road than being loud. As for setting the spring rate, can anyone point me where I'd find instructions to do that? Since it's used it didn't have any. I assume it's that little nut next to the vacuum nipple, but if it is I don't know which way to turn for heavier and lighter setting.

 

Hmmm... this sucks. My buddy had one on his FC. He did a TII swap and on stock boost it sounded pretty good. Oh well. I'm more concerned with it's practical use down the road than being loud. As for setting the spring rate, can anyone point me where I'd find instructions to do that? Since it's used it didn't have any. I assume it's that little nut next to the vacuum nipple, but if it is I don't know which way to turn for heavier and lighter setting. I left it pretty tight, the way it came, to avoid screwing it up by not knowing which direction was which.

 

Are you sure about this? Listen to the Blitz on this website: SoCalSupras You can also listen to more BOV there. Also the HKS is not the only BOV to make that sound. IMO the Turbo XS is the loudest, but I like the Blitz sound better. I'll be installing mine sometime this summer, right after I get my bodywork and paintjob done

 

might have a problem with the vaccum hose. check it every time ive had that problem it been the hose poping off

 

Adjusting the spring rate can make a big difference. My friend has the Turbo XS RFL, and you can have anything from a loose spring (loud CHOOOO!!!) to a heavy spring (short phsst!). Sounds to me like you need to tighten the spring up to make it heavier. I'm not familiar with the Blitz BOV adjustment though sorry.
Evan

 

if you turn the screw to the right it tightens the spring rate and less air will releasem, if you loosen to the left more air will release and make it louder but you will have more chances of boost leak.

 

Ok, thanks for your help guys! I'll play with adjusting the spring rate screw and see what happens.

 

Which version of the bov do you have? The new one or the old one with the trumpet end? I have the older one and it's really loud. Blowing off at 3psi is louder than the stock one at 10psi. I think mine is set low because it will blow off in vacuum.

 

It's the old model, with the trumpet end.

 

the turbo xs rfl is the loudest i think

 

that is why its model ID is RFL

RFL = really ******* loud.

 

My friend switched from the HKS SS to the RFL, and the HKS was louder. Maybe it was just because it was so piercing and high pitched though. The RFL is a whole different sound. It's cool to be able to see the valve open up too.

 

LOL @ RFL = real ******* loud

but yeah, i have the turboxs rfl and its loud, all you hear is vrooooooooommmm, pusssssssssssshhhhhhhhhhhhh!!!!!!!!!!!!

too bad its only noticeable at like 7500rpm..

 

Eh, I'm not too happy with this Blitz. Im gonna go get me an RFL. Kinda hoped for one that works well and isn't a pos AND is somewhat loud. But at least is works well so it'll do for now.

 

the greddy type s sounds sweet although i only heard them on supras, it goes good with their engine sound.. i have not yet heard one on an rx7

i might sell my RFL and get me a type s