guys, i had my greddy type s BOV in my car almost a month already. just a while ago, i wanted to do the single spring mod, and i checked out installations online. i was shocked to see that I have installed my BOV the other way around, if you guys view this: http://www.evomoto.com/image.php?timage=types5.jpg, my BOV was installed that the piping was the other way around. (you know there are two main pipes, one comming from the intake, and one comming from the intercooler, i have switched them accidentaly. (thats how i have had them for a month)

the way it sounded is like a dog barking (a loud bark, then about 4-5 echos of the bark at 21psi), or from the outside, it sounds like my tires peeling out (thats what they said). at lower revs (like 15 psi), it sounds like a automatic laser gun (like 6-7 echos).

i just put it back the right way, and now i can hardly hear the BOV. i think i have to adjust the screw, becaause i think its too tight, but i can hear like that fluttering sound at first then a high pitched sound at the end.

the first installation (the wrong one), sounded more noticable, and turns heads, the one right now doesnt sound loud (ill do the single spring mod, and adjust the tightness). i have noticed when i switched the BOV around that the performance in the car went way better (especially during fast shifts).

with the incorrect installation, i noticed that when i shift fast, i hear a popping sound from the intake (i felt the car lagging). there is a delay in shifting.

im just waiting for the car right now to cool down a little bit, maybe like an hour, then go back working to the car. in the meantime gimme some opinions on this.

also, btw, to add on, i lost the guide and the sticker, but if im facing the purple part in front of me, which is tighter and which one is looser?

one last question, i want to try to vent my BOV (remove the piping to the intercooler), but the screw on the piping from the BOV to the intercooler is too much facing the battery, that i cannot even fit a ratchet in it. i cannot loosen it with a screwdriver because there is not enough space. im trying a wrench but it is very difficult. how did you guys remove this screw?

chris

 

To VTA you need to remove it from the intake, not the intercooler pipe. It was louder when it was backward because you were prolly hearing compressor surge, which ruins your turbo.

 

The flanged end goes to the intercooler pipe, the other end is to the intake.

 

bump... anyone else?

thanks krafty for your response. i dont get what compressor surge means and how it can damage my turbo..

anyhow, performance wise, i felt it shifted better. like sometmes when i give the wrong amount of gas to the clutch at low speeds, i hear something in the engine, like something is rattling, and when i shift, there used to be a popping sound in the intake, now its all gone.

 

Compressor surge is when the BOV doesn't release the air built up from the turbo and it is forced back thru the turbo causing the turbo fins to spin backward (which is the noises you were hearing when it was on backward) That will eventually kill the turbo, because the turbo fins are already spinning in the correct direction, and then forced to spin backward when the air pressure isn't released.

 

Definitely check to see if you damage anything in the Turbo. You installed the BOV backwards, which means the pressure from the turbo is 'going back' to the turbo and if it was strong enough it could damage the blades and make it turn backwards. F###ing it up!
The BOV is one direction. The valve works in one direction too.

Turbo>>>>>BOV>>>>>Cir. or VTA

(You) Turbo>><<<<BOV = Damage

If you want it to VTA, the Type-S should come with a plug. Just plug it on the pipe where your BOV will be connected into. Have the BOV installed with the exit side open.

Good luck!

 

wow, i cant believe it... but so far, i havent experienced any problems whatsoever after i put it the correct way, assuming that i havent damaged anything... i believe i had the BOV the other way around maybe for like 2,000 miles...

i guess i wouldnt have it checked becasue i dont find anythng wrong yet at the moment.

chris

 

You probably didn't hurt anything but if you want to check pull the inlet to the turbo off and check for shaft play. (try to move the compressor wheel up and down) Alittle movement is OK but if it moves more than about a 1/4 inch the turbo is on it's way out, but again, it's probably OK.
Also if you can't hear the BOV, put a K&N or HKS drop in filter in then you'll be able to hear the BOV when it's in the correct way. Or you can ditch the stock air box and get a HKS suction kit.

 

yes, i actually been having a HKS RS Intake eversince.. my mods are intake, TBE, MBC. no flash.

i tried venting the BOV and it sounds a little better. but for now, it still not as sound as last time, way not as loud. i tightened the screw a little bit but i just sounds the same.

 

I would advise against trying to vent your BOV, your asking for trouble. The mass air flow sensor has already performed calculations based on the air that has passed through the intake. If you vent your BOV your going to screw those calculations up and your car will run like $h!t. Simply put, DONT VENT YOUR BOV.

 

Evos hate VTA. Runs like crap and boost surge like a ****. Bucking and kicking.....

You have a R32? and you didn't know about your BOV installed backwards?

 

i just fixed my BOV again. from having it with 2 springs (stock), i changed it into 1 spring (the larger spring), and from VTA, i made it recirculating.

what i noticed soundwise is that the BOV sounds like the wrongly installed BOV, doesnt sound like the dog barking, but it sounds a little lower than that, and the echoes.

the sound with VTA is it sounds like echoes then a high pitched noise at the end. i dont hear the high pitched sound at the end with the single spring recirculating.

performance wise, the car flutters (like it lags when i shift), i think its because of the single spring mod. i think ill go back to double spring after a coupple opinions. i like the sound of double spring better. and plus it didnt flutter when shifting.

racerhead: yes, i have a r32, but i didnt really fix it up alot. it doesnt mean that if i own a r32 that i should know alot about turbocharged cars.

 

 

ok i did the same thing. i thought the stock and greddy blow off were set up the same but i based it off of looks. im getting a fluttering sound and then a chirp at high rpms. im running vta and i dont feel any lag or stalling. question so the flange that doesnt come with the blow off should go to the turbos intake right. and i just capped off the pipe going to intercooler piping.

 

No, if you are going to run vta you have to cap the intake piping between the airbox and turbo. You need the bov to vent the pressure after the turbo from the i/c piping.