Different 1g bov styles?

[talon555]

I recently purchased 2 1g bov's for my 2nd gen tsi. the first one i bought cause i thought i needed the pipe it came with. the second one looked better and was the one i planned on putting in my car(which it is currently installed. I tested out the first bov too, but didnt have it in there long enough to notice anything abnormal). The thing is, when i got them, i realized they are different. Both of these were bought off of ebay.

The first one has the traditional greenish top, with the vacuum nipple and the vent port facing the same direction. It's model number is K5T09272. This is the 1g bov ive most commonly seen in pictures.

The second one has a silver top(could have been painted), but has the vacuum nipple on the opposite direction of the vent port. Also the vacuum nipple is bent up and a little to the left(not sure if that was how it came, or due to damage). The model number on this one is K5T09472. The seller claimed that this bov came off a Nissan Skyline, and although i cannot confirm that, it could be possible.(sorry about the picture quality)

Besides the color, vacuum nipple direction, and model number, they seem to be exactly the same. Ever since i put the skyline bov on i can hear it blow off even at low acceleration, although it is very quiet. whats wierd is that it sounds kinda like a bird chirping(might just be my ears, but it does sound different). But at hard acceleration, it sounds normal. Is it that the stock 2g bov is just not loud enough to be heard at slow accel, or is this valve defective? And whats the difference between the skyline one and the regular dsm bov? Which one should i go with?

 

[Defiant]

I wonder if one's off a Stealth.

 

[TrboANTsi]

the only difference to me is it looks like the top housing was rotated, but they do look the same

 

[95blackGsTurbo]

Top was probably rotated for a front mount that put the BOV in a weird place. Did Mitsubishi rotate some of them since some came mounted upside down?

 

[olmytsi]

All the ones i have seen have the nipple facing the same side as the outlet so ill say thats a bov off another car that just looks similar to a 1g....i know the stock wrx/sti bov looks alot like that.

 

[talon555]

I was gonna try the green bov again today, but i found a hole in my vacuum line about an inch from the bov end and had to cut it off. Since it was already a stretch to get it to fit on this bov the first time, there is no way i can get it to reach now, so i kept the silver bov on. I figured that was what was causing the wierd blowoff sound at low acceleration, so i took it for another test drive. unfortunatly it didnt make a difference. the bov still made noise at low accel. this got me wondering, maybe the spring in the bov is weaker because it is designed for a different car? it seems much stronger than the 2g bov, but who knows. i plan on testing the other bov as soon as i get a new vacuum line. oh and i was wondering, should i notice a performance difference now that i got a 1g bov?

 

[95blackGsTurbo]

Your 1g will flutter at lower boost levels. All of them do it. And you won't notice a perfoamance difference by bolting on a blow off valve.

 

[talon555]

Your 1g will flutter at lower boost levels. All of them do it. And you won't notice a perfoamance difference by bolting on a blow off valve.

ah. thanks for the help.