The building block

SpeedRacer · Postby **SpeedRacer** » Thu Nov 13, 2008 9:14

Well.... Jordan from CPE was in my car at SEMA and didn't say shit :P

firestoned · Postby **firestoned** » Thu Nov 13, 2008 9:14

SpeedRacer wrote:Well.... Jordan from CPE was in my car at SEMA and didn't say shit :P

well that's all fine and dandy.... but has nothing to do with bov's..or compressor surge

Rich · Postby **Rich** » Thu Nov 13, 2008 9:14

The HKS is also a pull type, but I am unaware of how it differs from the Synapse. I'll be up there in the AM and we can do a quick swap just for kicks Eric.

wyosaint · Postby **wyosaint** » Fri Nov 14, 2008 9:14

reading this makes me want to cancel my order for the hks...:O

bobopud · Postby **bobopud** » Fri Nov 14, 2008 9:14

Eric, since you have one the research and I think it will ease a lot of people's minds, can you make a list of BOVs that are safer for the speeds? I have an HKS, but I have never heard what you are experiencing and I am not nearly as modded as you are either. I do have some strange noises under WOT, but I have been informed that it is nothing dangerous and not to worry about it.

firestoned · Postby **firestoned** » Fri Nov 14, 2008 9:14

Rich wrote:The HKS is also a pull type, but I am unaware of how it differs from the Synapse. I'll be up there in the AM and we can do a quick swap just for kicks Eric.

Correct, it is a pull-type, like many others, but it is a one way diaphram design, which is what creates the flutter if the bov cant keep up with the air movement. The Synapse is a centrifugal force type, no diaphram. This is a response I got From Jordan at Cp-e:

"Welp, what I can tell you is that anytime you hear the fluttering sound, that’s compressor surge. I think part of the reason why you’re getting mixed advice is because people are confusing the terminology. Compressor surge is only a problem under high boost levels. In other words, if the BOV is activating under high boost then you should be fine."

I experience it even at high boost, you can hear it over the actual blow off..

Patrick, the only reasearch Ive done is definitions and instances of compressor surge/flutter. After reading, I believe that most turbo vehicles with a diaphram type bov will experience some sort of flutter/compressor surge. Most people say under 8psi, it is not dangerous enough to damage the turbo, but when you push 15-18 like we do, it can definitely do harm. The trapped pressure is boucing off the impellar blades of the turbo, causing the blades to be stopped and go the other direction.

After reading the link for Synapse that I posted here, it makes alot more sense, and that should answer more questions. They even do a comparison next to a hks type bov. Check it out

I will be getting a Synapse to test, I will try to post videos of before and after to show any difference it makes

Rich · Postby **Rich** » Sat Nov 15, 2008 9:14

Eric, after hearing your car, that "flutter" you're getting is not from your BOV. That sound happens after your BOV has already closed. I'd put the VTA horn on and leave it in recirc as well. Seems to me like your BOV isn't staying open for a long enough time.

firestoned · Postby **firestoned** » Sat Nov 15, 2008 9:14

Rich wrote:Eric, after hearing your car, that "flutter" you're getting is not from your BOV. That sound happens after your BOV has already closed. I'd put the VTA horn on and leave it in recirc as well. Seems to me like your BOV isn't staying open for a long enough time.

yep, the flutter is the air that the bov didnt recirculate or vta, it definitely isnt staying open long enough, because it cant vent all the air the turbo is creating, even at its loosest setting. If i tighten the spring, it only gets worse. With the spring at its loosest, it leaks boost. It vents to atmosphere at very low boost, which will help temporarily, but screws with my afr's.. I almost have to put it into boost now everytime i accelerate, so that it will vta, but as you heard, Rich, it still flutters even after it has vta'd... the design is simply not right for my setup

Luckily, I have the opportunity to test the other bov, if it doesnt correct it, its no loss to me. But Im willing to bet that it will outperform any diaphram style bov, and alleviate my problems. Im actually pretty excited about it, by watching that comparo video, it opens so damn fast, thats just quicker I can get boost back in there.. we'll see

Gmoney · Postby **Gmoney** » Sat Nov 15, 2008 9:14

I must say I am intrigued about that BOV. Looks to work quite well, will be looking forward to the review when you get it installed. Did Rich's help the problem??

Rich · Postby **Rich** » Sat Nov 15, 2008 9:14

We didn't swap after all. I was headed up to snowboard, and Eric figured he'd try the Synapse first.

SpeedRacer · Postby **SpeedRacer** » Sat Nov 15, 2008 9:14

Yeah guys youtube Synapse BOV Mazdaspeed HP gain... 20whp! FTW... lmfao

http://videos.streetfire.net/video/Synchronic-BOV-Mazdaspeed_156202.htm

goldrocket · Postby **goldrocket** » Sat Nov 15, 2008 9:14

Looks like that's the bov you need eric, you're poor car is suffering at only 403hp. LOL

firestoned · Postby **firestoned** » Sun Nov 16, 2008 9:14

SpeedRacer wrote:Yeah guys youtube Synapse BOV Mazdaspeed HP gain... 20whp! FTW... lmfao

http://videos.streetfire.net/video/Synchronic-BOV-Mazdaspeed_156202.htm

i dont understand your post,

goldrocket wrote:Looks like that's the bov you need eric, you're poor car is suffering at only 403hp. LOL

and i dont understand yours either,

SpeedRacer · Postby **SpeedRacer** » Sun Nov 16, 2008 9:14

point is Synapse is a joke... but whatever havent' listened to me yet why start now?

Rich · Postby **Rich** » Sun Nov 16, 2008 9:14

Why is there so much animosity between you two? It's like a love/hate relationship, but about 10/90 balanced. Here's a thought: let's support each other in our endeavors and offer advice in the interest of serving our fellow enthusiasts. If the advice isn't taken, or refuted, well you did your part. We're here to have fun, not fight.

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