I have a Tial bov, and at first, had the unpainted spring in it. I had some horrible surge then. I got the black(lowest vacuum possible) spring, and that made it blow off a little easier, but still not unless I hit full boost(which is only 8 lbs. right now) Well, it blows off, but not before a couple of surges. I have it mounted to the intercooler right next to the hot side inlet. The intercooler is back door on that side too. Is there a reason it does this? Do I need a different bov, or placement maybe? If it needs replacing, is there another QUALITY brand that I can get with the same 50mm flange? Thanks in advance.

 

The spring matches your vac reading at idle. Do you have the proper spring? Also, you mention "quality" brands as if Tial isn't one of them...you have the best bov available IMO. I love my Tial 50mm and have never had an issue with it whatsoever

 

I know that this is one of the best on the market. "IF" I needed to replace it, what would be the best one to do that with? And yes the correct spring is in the BOV.

 

where is your vacuum source and how big of line is it?

 

It's on the i.m., and it's the same as the rest. I think it's 1/8 inch. Could be wrong though.

 

Would a larger source/hose make a difference?

 

it did on my neon

 

I'll have to try it then. Thanks!

 

Make sure the line is dedicated only to the BOV also, nothing t'd off the line, and don't tee off another line for the bov.

 

Also, don't confuse a little BOV "flutter" with compressor surge. At lower pressure levels and going back and forth between Vacuum and slight positive pressure, sometimes the BOV will "flutter" slightly. Surge is a very obvious "SHUDDER" of the compressor wheel and is heard more towards the engine than the BOV (unless your BOV is intercooler mounted from a back door setup.

 

I thought I was having compressor surge so I loosened up the blow off valve to soft and still had it. Then I took the spring out and cut a coil off of the springs and it stopped. But I wonder if what I was hearing was the BOV "flutter" or surge? Is there any deffinate way to tell?

 

goin thru the same thing right now just havn't had time to work on it....just for reference though is this a good example of how it should work when connected properly?
thanks.
http://www.youtube.com/watch?v=LKWaevWlMjk

 

yes, but it will never happen like that on a honda in neutral.

 

I'll re-do the lines to the BOV, and see what that does. Thanks guys!

 

that's half the size it needs to be...1/4" iD reinforced line, direct signal to the IM, NO T"s

 

like i said line size issue

 

So what about a vacuum manifold. Can I use one of those? I really don't want vacuum line running all over my bay.

 

best to use a direct source off the IM

 

You can use a manifold if you want, as long as the main feed is large enough.

If you don't want your lines looking messy then install them neatly. A vac manifold only makes it harder to make it look neat becasue you will have extra length on several of you lines going to it and more connections to make.

 

Cool, I guess I just need to figure this out on the car. Thanks guys!