bov problem PLEASE HELP

phs17 · Post by **phs17** » Fri Mar 12, 2010 7:28 am

well i bought a greddy type rs bov and when i accelerate it makes a cha-cha-cha sound? i tried adjusting the nut and screw but it still does it. whats wrong with it

phs17 · Post by **phs17** » Fri Mar 12, 2010 8:47 am

bump.

Post by **occasional demons** » Fri Mar 12, 2010 9:45 am

You have a Vegas dancer trapped under your hood?

IDK, give it some time for someone to respond. 80 minutes is a bit too soon to bump... IMHO

phs17 · Post by **phs17** » Fri Mar 12, 2010 9:49 am

im leaving for ocean city in 2 hrs . and my car is fucked up

teamliviD · Post by **teamliviD** » Fri Mar 12, 2010 9:49 am

how much boost are you running...the spring in the BOV may not be strong enough....or you are getting PTB and you will have to learn to drive your car differently.

phs17 · Post by **phs17** » Fri Mar 12, 2010 9:51 am

17 lbs i heard the rs are junk

teamliviD · Post by **teamliviD** » Fri Mar 12, 2010 9:53 am

that too...do ur self a favor and buy a TiAl BOV...best you can get...ever..

phs17 · Post by **phs17** » Fri Mar 12, 2010 10:02 am

i was thinking the turbo xs rfl

esteinmaier · Post by **esteinmaier** » Fri Mar 12, 2010 10:47 am

Get a stronger vacuum signal to it. Should fix ya up.

LionheartedSXT · Post by **LionheartedSXT** » Fri Mar 12, 2010 10:50 am

Tial or synchronic is probably your best bet, then again hks is great too. Did you check the vac line going to it? Is it teed off with something else?

Edit: ^^^ beat me to it

phs17 · Post by **phs17** » Fri Mar 12, 2010 11:47 am

yes its tee'd off

n20sxt · Post by **n20sxt** » Fri Mar 12, 2010 12:17 pm

phs17 wrote:17 lbs i heard the rs are junk

Im running a greddy RS and have had no problems with it.. +1 to what eric said

phs17 · Post by **phs17** » Fri Mar 12, 2010 12:27 pm

so i should buy another line . the one i have looks fine. i dont kno why it would make the cha-cha sound

LionheartedSXT · Post by **LionheartedSXT** » Fri Mar 12, 2010 12:39 pm

Or maybe just invest in a vacuum block, to make everything neater and easier. What better person to go through than yours truly Erick(esteinmaier). Talk to him if your interested in a vacuum block.

DoubtedNeon · Post by **DoubtedNeon** » Fri Mar 12, 2010 12:52 pm

I bought one, best money i ever spent on my car.

phs17 · Post by **phs17** » Mon Mar 15, 2010 9:20 pm

esteinmaier wrote:Get a stronger vacuum signal to it. Should fix ya up.

how would i go about doing that

esteinmaier · Post by **esteinmaier** » Mon Mar 15, 2010 9:59 pm

A bigger line directly to the manifold, or use a vacuum manifold, such as the one I sell.

project 03 R/T · Post by **project 03 R/T** » Thu Mar 18, 2010 7:58 am

I use a vaccum block and my Greddy RS works fine. I initially had the same problem you had. I would go out and get compressor surge under shift changes. What I did was to loosen mine almost completely, then tighten it a few turns. Then go out and try shifting again under boost. I'm running 10lbs right now and she opens with zero surge everytime. I found that the "start near the loosest setting and work your way back" method worked easily and permanently. Im set pretty loose. I see 17inches of vaccum at idle if that helps.

OB · Post by OB » Thu Mar 18, 2010 1:49 pm

Sounds like compressor surge.

's

phs17 · Post by **phs17** » Mon Mar 22, 2010 10:18 pm

well i installed the turbo xs rfl bov. and its still making the cha-cha sound. i dont have any boost leaks i checked

project 03 R/T · Post by **project 03 R/T** » Mon Mar 22, 2010 10:32 pm

your plunger is set too high. You aren't making enough boost to open it and the air is being forced back to your compressor housing causing the surge. There was nothing wrong with your Greddy RS. You just need to experiment with the setting (softer obviously) until it blows off and doesn't surge.

phs17 · Post by **phs17** » Mon Mar 22, 2010 10:38 pm

project 03 R/T wrote:your plunger is set too high. You aren't making enough boost to open it and the air is being forced back to your compressor housing causing the surge. There was nothing wrong with your Greddy RS. You just need to experiment with the setting (softer obviously) until it blows off and doesn't surge.

plunger? its not the bov. its new and it works perfect at the setting its at now

project 03 R/T · Post by **project 03 R/T** » Mon Mar 22, 2010 10:53 pm

phs17 wrote:well i installed the turbo xs rfl bov. and its still making the cha-cha sound. i dont have any boost leaks i checked

Spring pressure, sorry for the confusion. After reading this post it seemed as if you were still having the compressor surge. So your BOV is operating correctly now? Typically you will get the surge if the spring is set too stiff in the BOV and the charged air can't escape. It may be partially opening and not be completely opened. I would adjust it a tad more loose and make some quick runs. If the BOV was working correctly, I don't see how you could get the surge. It should be preventing that.

If that doesn't work then I would take Erik's advice and get a stronger vacuum source from the intake. I would say lose the "T" fitting and get a block.

SRT_coupe · Post by **SRT_coupe** » Thu Apr 01, 2010 10:25 am

sounds like part throttle boost .when you are accelerating are you full throttle or like 60-80%? also what wastegate do you have?

phs17 · Post by **phs17** » Sun Apr 04, 2010 1:20 pm

agp wg

SRT_coupe · Post by **SRT_coupe** » Tue Apr 13, 2010 3:23 pm

try putting the stock wg on . if it goes away then its ptb if not then its the bov

phs17 · Post by **phs17** » Tue Apr 20, 2010 1:41 am

the wg could be causing this problem?

SRT_coupe · Post by **SRT_coupe** » Wed Apr 21, 2010 6:29 pm

yes the aftermarket wg are so stiff it make the small stock turbo spool faster than the engine can take in the boost. causing to much pressure which makes the turbo surge since the bov wont open until you let off the throttle

esteinmaier · Post by **esteinmaier** » Wed Apr 21, 2010 6:37 pm

No, it's surging because with the stock ECU, at part throttle, it opens the wastegate accordingly. With an aftermarket wastegate, it doesn't open until desired pressure is reached in the manifold. If you're choking it off with the throttle blade, you're getting very high pressure in the pipes but not the manifold. The turbo continues to spin as hard as it can with the exhaust volume it is given, and there is nowhere for the air to go but back out the way it came, causing surge.

When you go off of stock ECU boost control, you need to drive the car differently. Spend very little time in part throttle boost. If you don't need the power of full boost, shift.

phs17 · Post by **phs17** » Wed Apr 21, 2010 8:55 pm

im stage 1