Thanks, I will try and adjust it, I have it on full soft.

 

So, when I go up hill, I can hear the turbo and sometimes when I let off the gas I hear a slight flutter. Keep in mind this is all under 3500RPM. I have the Greddy Type-R.

 

sounds like compressor surge but you won't be able to tell until you get into boost.

the type-r should be compatible for your setup.

 

Scott if you go into positive boost and you still have the surge flutter then you may need to make adjustments.

 

Derrrr thats what I just said.

 

lol

 

Mine does the same. I've had multiple people tell me that is normal, but I still try to avoid it by either: letting off slowly or getting more into boost.

 

Okay good to know... I'm feeling comfortable, and always have felt comfortable, with the idea that it's just the BOV fluttering....

 

Yeah thats what it seems to be

 

That fluttering sound you are hearing IS compressor surge - I'm almost positive of that . A BOV does not make that noise - there is a distinct difference between pssssht and kululululu . And those guys that say it is "normal" think that because it is soooooo common that it probably does seem "normal" to them .
Whether surge at that low level is a problem ....... I don't really know . What I do know is that my turbo has lasted a very long time - and I adjusted my BOV so that I didn't get ANY surge.
If your BOV is VTA , I would say that it is virtually impossible to avoid surge unless your BOV is a particularly good one. I found I had to adjust mine such that it was actually partially open at idle before it would do the job properly . Not a good thing if you are VTA but perfectly fine if you recirc.
Another side issue to this is part throttle boost - with a correctly adjusted BOV part throttle boost (potential boost spikes and uncontrollable spin outs) will be minimised.

Oh and BTW - the Greddy type R is NOT a good BOV .

I did a full writeup on this stuff a couple of years ago - see "boost control" .

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/getting-most-out-your-greddy-turbo-without-breaking-bank-172542/

 

I read that thread. Why do you think the type R is not a good BOV? Think it's too big for our application?

 

No - not too big . Just not a good design.
PM Gregs - he has had more experience with those than I have .

 

I got a knock off type RZ we can test out!

 

I actually read up a bit on the Type R after receiving the kit and I found conflicting info. most reviews say it's great, some say it's for 20PSI and over setups but nothing definitive from any reliable source. It's popular with the supra crowd.

I wonder if the flange is the same for all the Greddy BOV's.

 

I believe the r and rz are the same flange, the RZ replaced the poorly designed R. However mines a knock off so I just want to see if it will work at all !

 

I have the hks ssq... one large question that comes to mind is whether it is a legit HKS bov or not. I get the flutter here and there but not if I hit any kind of positive boost.

my BOV does not have the screw on the back of it for adjustment so I am not sure how I would go about adjusting it.

 

Cant adjust the ssq thats why its a piece of ****.

 

I want the synapse diverter valve. It is ballin (literally it looks like a ball)

 

i think you should tear it all down and start again... i mean seriously, what is another 4 months honestly

 

lol

 

F@#k that, it's finally running right. It loves this cold weather but keeping the revs below 4,000RPM is like going to a strip club and not getting a lap dance.

Do they make a recirc fitting for that?

 

The ssqv is supposed to be one of the "good" ones because it has the two stage system . The smaller port should take care of the very scenario we are discussing here because it requires way less force to open it . Surprised to hear that it doesn't do that - maybe talk to other owners of that valve and see if theirs does the same .

 

fixed

 

Had to add the shady touch.

 

Yeah both of those are good.