openuser
03-16-2009, 12:22 AM
Hi guys, As you may know I just purchased HKS SSQV with CP-e Flange from Pat.
The vacuum source I used is the smaller hose from the Stock BPV, and I used also the Stock Return Hose (the bigger hose).
The smaller hose is connected to the vacuum filter that came with the SSQV and the filter is connected to 4mm vacuum hose, which is connected to the SSQV.
Now, I had two tries on this install, I tried really short hose that connects the vacuum filter to the SSQV (4mm one). That gave me flutter like sound with jerk forward when I left the throttle under moderate boost.
I thought the vacuum line was getting pinched between the hood and the vacuum nipple on the Valve as the engine moves about during acceleration..
So I rotated the Valve about 10~20 degrees so it is closer to horizontal orientation than before, and cut the Stock Return hose about half an inch to stop the return hose from kinking.
I still have the flutter link sound and jerk.. This is when I release throttle without intention of shifting.. So lift throttle after moderate boost at around 3000 RPM, NOT followed by depressing clutch.
The jerk is not there (obviously) when I depress clutch right after I lift the throttle.
Furthermore, after Hard acceleration I do not feel the jerk even if I lift the throttle without depressing the clutch. I am thinking this may have been due to the velocity at which the car travels after Hard acceleration. The faster the car travels, more momentum it has, and less profound the jerk would be even if it is there.
Likely, under mild acceleration, I do not hear flutter like sound, but very muffled single release noise. I do not feel jerk either.
So, I did some more research into this matter and found the following vids.
One from UOU, and the other from some dude in the States.
http://www.youtube.com/watch?v=nB1wnKdIT10
In UOU's video, I hear Two and Only Two distinct release sound. Which is predictable as SSQV has two release valves, one small valve (primary) and one big valve (secondary). So Primary one quickly opens making the first release noise, and then secondary follows making the second release noise.
What I really hear when I lift the throttle after moderate acceleration is the following:
http://www.youtube.com/watch?v=YjDxKkRU1F0
http://www.joejimenez.com/rkm/rkm.wmv (just like this one)
More than 3~4 release-like sound after I lift the throttle.
But it does not sound anything as bad as this:
http://www.youtube.com/watch?v=MfsD-6_Dp58&feature=related
Does anyone who has SSQV installed hear only two distinct release noises?
Or is flutter like sound normal?
Thank you so much in advance!
Edit: Looks like it is a general things to have more jerky and flutter with SSQV?
In this thread, http://www.mazda3forums.com/index.php?topic=117715.120, even RKM SSQV has been giving MS3s jerky car and flutter sound... But they have been able to cover up that problem by adjusting spring rate with the bolt at the back of the SSQV.. The problem here is that HKS ones do not have the bold to adjust the rate...
The vacuum source I used is the smaller hose from the Stock BPV, and I used also the Stock Return Hose (the bigger hose).
The smaller hose is connected to the vacuum filter that came with the SSQV and the filter is connected to 4mm vacuum hose, which is connected to the SSQV.
Now, I had two tries on this install, I tried really short hose that connects the vacuum filter to the SSQV (4mm one). That gave me flutter like sound with jerk forward when I left the throttle under moderate boost.
I thought the vacuum line was getting pinched between the hood and the vacuum nipple on the Valve as the engine moves about during acceleration..
So I rotated the Valve about 10~20 degrees so it is closer to horizontal orientation than before, and cut the Stock Return hose about half an inch to stop the return hose from kinking.
I still have the flutter link sound and jerk.. This is when I release throttle without intention of shifting.. So lift throttle after moderate boost at around 3000 RPM, NOT followed by depressing clutch.
The jerk is not there (obviously) when I depress clutch right after I lift the throttle.
Furthermore, after Hard acceleration I do not feel the jerk even if I lift the throttle without depressing the clutch. I am thinking this may have been due to the velocity at which the car travels after Hard acceleration. The faster the car travels, more momentum it has, and less profound the jerk would be even if it is there.
Likely, under mild acceleration, I do not hear flutter like sound, but very muffled single release noise. I do not feel jerk either.
So, I did some more research into this matter and found the following vids.
One from UOU, and the other from some dude in the States.
http://www.youtube.com/watch?v=nB1wnKdIT10
In UOU's video, I hear Two and Only Two distinct release sound. Which is predictable as SSQV has two release valves, one small valve (primary) and one big valve (secondary). So Primary one quickly opens making the first release noise, and then secondary follows making the second release noise.
What I really hear when I lift the throttle after moderate acceleration is the following:
http://www.youtube.com/watch?v=YjDxKkRU1F0
http://www.joejimenez.com/rkm/rkm.wmv (just like this one)
More than 3~4 release-like sound after I lift the throttle.
But it does not sound anything as bad as this:
http://www.youtube.com/watch?v=MfsD-6_Dp58&feature=related
Does anyone who has SSQV installed hear only two distinct release noises?
Or is flutter like sound normal?
Thank you so much in advance!
Edit: Looks like it is a general things to have more jerky and flutter with SSQV?
In this thread, http://www.mazda3forums.com/index.php?topic=117715.120, even RKM SSQV has been giving MS3s jerky car and flutter sound... But they have been able to cover up that problem by adjusting spring rate with the bolt at the back of the SSQV.. The problem here is that HKS ones do not have the bold to adjust the rate...