ITRICED

MY blow off valve seems to flutter when i shift at high rmp instead of making a whooshing sound. I was wondering if that is normal?

Mrbustanut

Are you sure its the BOV and not compressor surge?

EARLdaSQUIRREL

what spring do you have in the bov?

kprashad

I think this is normal...does it sound like this

http://www.youtube.com/watch?v=tXqgTtHECnk

street_ride14

n00b 1 "So Eric, what spring do you have on that BOV ?
n00b 2 "12 pound spring"
n00b 1 "and you boost to 20 psi right ?"
n00b 2 "right."
n00b 1 "When does the surge occur ?"
n00b 2 "at 5, 10, and 11 pounds "

to top it off, the end Title states "TiaL 50mm BOV, da Surge maker."
.
They make it seem as if that's what's supposed to happen and it's normal. It's NOT. Compressor surge will destroy that turbo very fast. Ofcourse you'll have surge when you're below the boost level of the BOV spring. n00bs.

OP, since you're having this problem at a high RPM range then I'de recommend finding out what spring you have in that BOV and get a weaker spring put in.

SD_Lurker

iTrader: (4)

What are you talking about? Do you have any idea what that video is about? Its Synapse doing his best to degrade Tial's BOV to better himself and the Synchronic BOV. Pay attention son.. Nowhere in that video do they say Comp Surge is good and normal. The are implying the exact opposite.

street_ride14

^^ Whatever floats your boat guy. I don't know the story about Synapse vs Tial, and so for me they look like a bunch of rooks.

blinx9900

That synapse video is all BS, they put the wrong spring in there to make it perform poorly, here is the proof:

http://www.youtube.com/watch?v=8-JTfgpFKrM

twkdCD595

Yep that first posted video above is one of the many Synapse attempted hit job video on Tial.

I guess when you cant beat someone else product, you falsify a test and make a youtube video of it cause people believe everything they see on the internet without doing any research to understand the background.

To the OP: What spring do you have in the BOV and what in/hg of vac you pulling at idle? Seems most commonly people dont understand how to select the proper spring, many think that you select the spring based on how much boost pressure you run... which is incorrect.

Any chance you can get a short clip of the flutter your talking about for us to see. It would make it easier to judge if it is compressor surge and something to be concerned with.

TiAL

peter is back everyone!

dpetro1

please give more details on the setup including engine, whp, how you have vacuum routed to the BOV, what rpm are you getting the fluttering? what spring do you have in the BOV?

in my experience i get some fluttering at low rpm/ low boost. blows off clean at higher boost and rpm. and by fluttering i do not mean surge, i dont think ive ever heard a turbo surge in person much less my own car.

kprashad

lol hey I never said I knew for sure I just googled Tial to see what it sounded like and noticed it made the sound that this guy is talking about. So i let him have a look to see for himself

fishieman

I hate it when the OP doesnt respond..
All this advice , worth crap.

ITRICED

Ok im sorry i didnt give more info Here it is
b18c port and polish head
stock bottom end
valves springs retainers buddy club
buddy club spec 3 cams with cam gears
-AFI 304ss Tubular Ramhorn Manifold, Limited Lifetime Warrany
-AFI 3" Stainless Downpipe w/ braided flex and O2 bung
-AFI Stainless DIY dumptube kit
-AFI 26x6.5.3.5 Garrett Core Backdoor Front mount Intercooler
-AFI 2.5'" Powder Coated Charge Piping Kit, Bead Rolled
-AFI Street oil line kit (AN fittings, Braided line)
-Garrett T3/T04e 57 trim
-Tial 38mm MVS V-Band Wastegate
-Tial 50mm Q Blow-Off Valve
with a s300 hondata
I hope thats enough info oh i and 5 lbs of boost

TheShodan

iTrader: (14)

hmmm. those cams on that setup, that is going to be interesting.

92redhatch

i was told that the spring inside the BOV has to be the same vac pressure your getting at idle. am i right? like if my car is 21 vac at idle i need a pink tial bov spring so it can work properly.

ITRICED

well i dont know about the vac yet ill try to find out some more info on that. Now some one asked about my cams well they seem to wanna rev up to 9k but i just leave it at 8200rpm so yea. The car is not fully tuned yet only because i dont have a boost controller. well maybe if i use my spring like it should be used i wouldnt have the problem hopefully

dpetro1

here's the chart for spring pressures http://www.tialmedia.com/documents/w3_tial_bov50_sp.pdf

i think most honda applications can use the 11psi spring with no issues. the 12lb may be a little too heavy (refer to that first video of the subby)

twkdCD595

See link to chart for spring selection in the post before this one... you need to know how much vac (in/hg) your motor pulls before you can properly select a spring as I indicated in my first reply.

Just saying generally this one will work cause it work on someone elses is not the way to pick a spring... especially with those cams which probably greatly affect how much vac (in/hg) your motor pulls at idle.

dpetro1

also i just read the part where he is only running 5psi. thats why its fluttering. completely normal. but you should still check to make sure you have the right spring. might need a lighter spring with those cams but follow the instructions above to be sure

92redhatch

ya i have an unpainted spring and i have 20 vac. i knew it had something to do with the vac.

Alfa Turbo

If this is indeed the case, how truly sad. I would NEVER do business with someone who represents themselves like that no matter the quality of the product.

ITRICED

ok well i check out the spring. I wanna thank everyone for there input and help on the subject.