Upgraded Turbo BOV/DV?

[03slvrstone]

I am getting serious compressor surge. Was told that my kompact turbosmart might not be big enough to handle the compressor charge. what are you guys running as far as BOV or DV?

yes that is a noob question and after a little research I see most are running standard DV. Anyone running into any compressor surge with those?

[Wolk's_Wagon]

Surging when you let off the throttle at max boost? Sounds like ChuChuChu?

[TurboGTiandZX12R]

I am getting serious compressor surge. Was told that my kompact turbosmart might not be big enough to handle the compressor charge. what are you guys running as far as BOV or DV?

yes that is a noob question and after a little research I see most are running standard DV. Anyone running into any compressor surge with those?

yes I get it when I have my Greddy recirced, but not when open. I think the recirc hose is a little small.

[ajd5]

as far as ive read and heard just stick with the dv.  why mess with something that works.  our cars arent meant for bovs. even if you have a bt.

[fast_a2_20v]

Most DV's are pretty dinky... If your getting surge when you shift, don't ignore it... turbos are expensive...

It might be a PITA to have it go rich and such every time you shift, but hell, its better then buying a new turbo.

The best BOV on the market right now is probably either the Tial 50mm bov (put it in a C clamp overnight before installing it to help fatigue the spring first, its a little stiff) or possibly the turbosmart BOV's.

Thats my take on the subject, but i've never had to deal with a stock ecu either. I guess you could try two DV's lol.

[fonzi337]

I've been running the Hyperboost DV from Stratmosphere on my GT28R setup for a couple months and it works very well. Haven't noticed any surging that couldn't be tuned out. And if you're worried at all of not having a BOV sound, this thing is pretty loud too.

[03slvrstone]

yeah sound is not an issue. Performance is and reliablity is more of a concern. I bypassed the n249 and that has helped a little. But I am looking into some other options now to try and cure the problem...

[enginerd]

you can get that if your springs set too tight, or your vac line is messed up. Id say you need some serious flow to have a DV too small.

[20V18Tnut]

I dunno man, ever since the K04 install, all the DV's I've tried chatter like mutha: Bailey, Forge DVR, Greedy S and RS, even 110N I am running now.
N249 is bypassed, I tapped it to FPR line and it does not have any leaks.
All the searches I've done on tex bring a bunch of posts which either have a zillion posts mostly containing arguments between dizzy and raman, or chris and somebody else, or as very usual for tex dont have a conclusion.
I just live with that "chuchuchuchuchu" sound.
Just for kicks and giggles, I run Greedy RS as BOV for a couple of days, but it is still doing it.  :squintfinger: to the chatter.

[enginerd]

id try it with the N249 hooked back up. The computer opens the dv faster because it uses the vac canister. sure it may do it when you don't want to, but it will save the ko4, which I believe is very sensitive to this.

[20V18Tnut]

Thanks. But my ol' no good K04 is gone about two years ago replaced by something else. Let's think about the DV. What causes the DV chatter? It could be a few things. First, pulsating pilot signal from intake manifold. Second, incorrect rate of biasing spring. And third, restrictive outlet line.
For the first, you are right, the vacuum reservoir should help bt serving as a vacuum accumulator. But, would this reservoir have enough time to fill out?
Second factor, the spring rate, we begin with 110N and work our way to Greedy or Forge which both have adjusment features. Many tinkered with the various settings, some succeded (I have never seen a single one) but many did not.
And the third....Lets ask ppl who moved the position of the DV next to the TB.

[fast_a2_20v]

FWIW your DV definantly isn't too small. You start running into problems with smaller valves (like hks ssqbov) when you get into big turbos like T61, SC61, +++

then you have the spring all the way shut and a direct vacuum source from the mani but it still surges...

ALSO k04, gt25/28/28rs and other small, high efficiency turbos tend to have very small, thin compressor wheels, which are very easily damaged by some abuse. This isn't a PT106 with 1/8" thick blades

[Spooled_AWP]

get the Tial BOV...isnt too loud either

[turbotuner20v]

i'm still using the stock one....

[20V18Tnut]

ALSO  k04, gt25/28/28rs and other small turbos tend to have very small, thin compressor wheels, which are very easily damaged by some abuse. This isn't a PT106 with 1/8" thick blades

OK, now, K04, GT25/28r/rs, get out of this forum, me too, he says our turbos are small, not BT  :face:

Ok, N249 is back in business, let's see if it would still chatter[/b]

[03slvrstone]

Lets ask ppl who moved the position of the DV next to the TB.

Anyone notice a increase or decrease in chatter by moving the dv to the tb?

[footose]

I used to get the "chuchuchuchu" when I was running a MBC (Spring / Ball) regardless if it was a BOV or DV. Are you running one by chance?

[03slvrstone]

yeah I am running the boostvalve.com MBC

[footose]

If it looks like this, then its probably why your getting blow back

[03slvrstone]

similar to that but not the same. plus I don't have mine running through the n75... Wonder if taking out the MBC and running the n75 again will make a difference. I will have to check that out tonight when I do some other testing...

[Rippinralf]

Steve just got a 50mm TiAL, i'm going to run one too but those springs are crazy hard. :eek3dance:

[20V18Tnut]

Well, hooked up N249 back and chattering did not go away. I, ve noticed the plastic cap on N249 fell of   gotta try replacing one.