I recently installed a Turbo Smart BOV . I t was my understanding that this particular turbo is vent to atmosphere and recirculating. Am I wrong? If I am right then how come my turbo is surging? This is very familiar to when I put on the HKS SSQV
I thought perhaps I screwed up the instalation on the HKS but also found out alot of people where having problems with the SSQV. So I bailed on that and traded for a Turbo smart. Now how come this one is doing the same thing? is it fine tuning?

 

BUMP BUMP.....i am considering the turbosmart BOV the one that claims to be identical to stock but you can VTA.........Opinions please.!>!>!

 

I think you have to play with adjustments on it, to get it working right. With some tuning time with BOV, it will running just perfect.

 

I don't know if i'm the best person to be asking this question. I have tried both ssqv & turbo smart dual port bov's. With the same results turbo surge and or cavatation of the turbo. particularly with the TS. I talked to people with the TS and they had know problems with it . I then talk to a rep for TS and they told me the proper way to install which had allready been done and could understand what might be going wrong. I'll explain. When the bov was done shooting to atmosphere the valve would close properly which all of this could be seen while hitting the throttle from the engine bay the horn faces directly at you. After it closed it would all of a sudden quickly open then close, open then close, open then close. this is where the cha cha cha cha was coming from. also known as cavatation of the turbo. I asked around to see if this was bearable or bad for the turbo. I got nothing but mixed messages. Some said it is tollerable and others said this should not be happening at all. Very bad for the turbo because it is causing back spin on the turbo. S \o since then i have been running the stock BOV I'm going to try closing off the atmospheric side of the BOV with the plate supplied by Turbosmart, so that it is just recirculating no 1/2 & 1/2. I'll will try it tonight for you and see what kind of results I get. It won't be as cool as with the horn on( Boy was that bov loud!) but it might be more efficient. Stock bov does not hold boost very well. update you soon About 1/2 hour.

 

By the way it is buy far the sexiest BOV on the market. Anodized billet aluminum....

 

well ive both plus the rfl. now if got the tial and from the sounds of things this is the best aftermarket bov i have seen yet. and its loud as hell i have heard the gofastbits is a good one also

 

OK I'm back sorry it took so long I had to do a oil change as well. Here is the results. while under high boost it sounds and performs great. but if your in any gear and ive it just enough gas for say 4 to 8 pounds of boost and let off it makes the cha cha cha cha sound (cavatation)
So as long as you run it semi aggressive with enough boost to open the valve there is no problems. I played around with the adjustment and it is set at the softest it can go. The downfall to that is you won't hold boost as well as if it were set at hard. I will keep playing around to see if i can perfect it to be just right. I guess you will have to make your own decision on this I am just one opinion of this product . It could be a # of things causing this. Maybe there not compatable with HKS RS intakes but i doubt it. Other people run'm. This is for sure every EVO is different.

 

The "Cha cha cha" Sound is fluttering of the valve when the pressure in the intake, and the vacuum to draw it open is nearly equal with a slight imbalance.. so it opens slightly and vents air making that sound repeatedly.. Its not harmful but a little ugly sounding.

Compressor surge is something completely different, typically its caused by the BOV not able to open quick enough, easy enough, or long enough to vent enough pressure from the upper intercooler pipe to prevent the compressor (the turbo) from being "Stalled" by excess pressure... Compressor surge is considered destructive and should be avoided at all costs.

You are much better off adjusting a BOV too loose so it opens prematurely than so tight that it can't vent between shifts and sudden releases of the throttle.

This is regardless of whether it vents to the atmosphere, or recirculates, or both..

On these dual mode BOV's that can do both, there's likely a spring pressure setting, and/or shims.. and a vent adjustment that diverts the correct amount of air back to the intake.

Turbo surge can feel like a stumbling, but it usually sounds like rattling and feels like stumbling, if you can hear it, thats bad..

 

i tryied everything to get them to work. could not do it. i was having same probs. met people at shows with those bov they said they have no probs. so i asked to take a ride. wouldnt you know same probs. some dont care about the neg. effects, others didnt know it was a prob. im not knocking anyone. but these bov's dont like or cars.

 

To malibu jack- SO your saying it's ok this sound I'm hearing. And it won't matter if I put the horn back on for atmospheric? I have experienced surge before when I 1st bought the car. I was at too high of boost in 5th gear when all of a sudden the car died in power and quick and just as soon came back strong agian. This is turbo surge correct? It's the fuel cutoff which causes this so as to save the turbo from blowing. Is'nt that right?