Ok I got the Blitz DD and it sounds kinda weird, but it's not annoying like the Greddy. I like the sound the Greddy makes but the constant hissing during decelleration is kind of annoying. Does anyone else have any recommendations for maybe a BOV that's a little nicer when shifting, but not annoying like the Greddy?

Thanks!

 

can't avoid it cuz we got the SC. the only way to remove the annoying hiss is to close the bov more. but since we only boost when the damn thing is turning. thats the only way.


welcome to the club.

 

maybe your BOV needs to be Altitude Corrected

 

lol i remember someone posting a similar altitude adjusting remark on the cl-s board.

 

i thought u are selling ur car?

 

Nah my car rules, I'm keeping it.

 

Do you have the horn or the little filter thingie on the Blitz?
I've tried both and left the horn on. The sound isn't like the R34 at all unfortunately but more like a long farting sound.

 

I don't know if this will help you guys since SC boost is dependent more on RPM than throttle (correct me if I'm wrong), but drilling a bleeder port may help make the BOV less sensitive; i.e.- keep it from activating as often.

High Boost BOV mod

Hope this helps

 

we dont boost high enough pressure to require a bleeder port
its just the setting on the BOV needs to be tighter..

brian can also adjust the spring and get the "high" performance spring so that its harder to blow off.

 

Wouldn't that defeat the purpose of the BOV (i.e.- compressor surge)? Do you guys have another bypass valve on the SC? I would imagine that w/o it, as soon as you open the throttle back up you're going to get some RPM surge. Just curious about a SC I guess...

 

i got blitz dual drive with the filter thingy.

 

 

brian most of us would sell their first born to have that hissing sound... ..ill get on your level sooner or later with alot of overtime and top ramen dinners...lol..you coming down this sunday??

jon

 

When are you taking it to the track? You already got a great time running NA. However, with a SC, it's a whole new game. I'm sure you'll get it down in time if not already.

 

main purpose of having the BOV is so that your turbine doesn't have a blow back and get damaged from internal pressure. not really for the whizzing sound . but thats just the kicks


how i do it is i rev to 3k and let off and thats how i measure the amount of blow off i would like to hear.


--ches

 

i get the chills just imagining the sound of a BOV on a maxima...

glad to hear you kept the car brian.

 

if you open the hood and stick your ear next to it.. its loud. heheeh

pitty other people on the street can't hear it as loud.. #%@ doh

 

Yeah without the blow-off the internal pressure works against the S/C or Turbo which hurts it when trying to build boost up for the next rev.

 

ches: i don't know about your bov adjustment method....

 

its only .2 seconds faster than your NA run

 

You could possibly attach a small megaphone to the outside filter assembly, that'd make the Hondas go:

 

Yeah Cheston I want to hear about this adjustment thing???

 

Its that nut and threaded bolt thing on top of the Blitz. I couldn't read the japanese instructions but basically you loosen the nut and turn the threaded bolt up or down and then retighten the nut. Someone said that they had it up quite high but I didn't like the noise at that setting. I lowered mine half way down.

I'm going to try out Cheston's suggestion to bring it up to 3k rpm and let off to hear the sound as I fiddle with the setting.

 

Huh? You talking to me? My fastest NA run was a 15.4, he's a lot faster than me.

 

maybe you didn't see the sig part about altitude corrected.. he actually ran 15's at the track

 

is this a post just to rub it in the non s/c'd guys faces?? "my whining noise is too loud" , oh shove it

 

i have the loudest whiny noise

throw steve kim in the car tho.. dunno which would be louder, the v1 or him..

 

Dave, you still got the 3.48 pulley? Time for a smaller pulley, come on, you know you want it.

 

Hey when I loosen that top bolt on the Blitz nothing happens, it just losens the nut, there's nothing under it to adjust? Can someone explain this more thoroughly.

 

Oops I thought you meant the one on the top, top, now I see what you mean, well I set it to the tightest and loosest and couldn't tell a difference, but I hardly drove it. Which way is supposed to be the loudest/longest/etc?

 

I forgot to mention that you use an Allen key to turn that threaded bolt. Did you try out Cheston's method of bringing it up to 3k rpm and see what happens?

 

BlkCat sorry, usually I'm quick to understand mechanical things, but I have no idea what you want me to do, any further explanation would be greatly appreciated.

 

Yeah, its hard to talk about that thread bolt on here....

Here's a pic I found...

http://store5.yimg.com/I/supra_1673_54022680

Ok, you see that threaded bolt sticking up on top of the bov? At the top of it an Allen key is able to fit in. So once you loosen the nut that holds it in position you use the Allen key to raise or lower that bolt.

Now some people have loosened it so that it is almost hanging on by a few threads but I found the noise to get a bit annoying while doing every-day type driving. I moved mine to half-way so that it'll make some noise when you're in enthusiastic mode I get a nice burble when I drive normal around town. When I stomp the pedal and let off the bov gives off a "Phhhhtt-***-***-***" kind of sound.

Daniel

 

I figured it out, thanks. It seems that the thing is the loudest and longest when I leave as much thread visible as possible (or just take the entire thing out). Is this consistent with your observations?

 

the bov is loudest when open. i.e. more air flowing thru the chambler to make it whistle.

so the more you open it. the louder it gets. BUT that means you wont have enuf pressure in the system when say you wanna stomp on it...

if its closed, you'll get better boost response, but not as loud.


hope that helps.

also. i've notice when i stomp on the gas in first after moving from a stop.. the boost pressure is not at 0. its at 10 vaccuum. why? because the BOV is open too much, and in first gear you're just pushing too much air into the car than it can handle...
so. my suggestion is if you stomp on it in 2nd gear, and you're still vacuuming, then close the bov some.

--ches

 

Oh thanks Cheston, yeah it seemed like my car doesn't have the punch it used to have. It all makes sense to me now. I'm going to go close it a bit.

 

remember!
sleeper mean no noise. heheh
but pitty with the aux fuel pump and all. we can't sneak up on unsuspecting mustang gts or what not. bah

 

You can hear my V1 at idle though so most people know what's up.

 

did you swap out your clutch already?

i dunno how long that stocker is gonna last with your driving style. hehehe.

 

how come you never go to the track cheston?