Greddy type s BOV not holding past 20psi or so

[Toni]

So during the dyno session on Saturday we were having problems with the bov fluttering while trying to lay down 3rd gear pulls above 20-22psi. Tightened the spring all the way and even tried to connect the lower nipple to the turbo intake tube to hopefully get some vacuum to help pull it closed from the other side. Opened up the bov today and the diaphragm looked good and the springs were not broken.

Seems odd because the springs just have to hold any pressure differential between the manifold post throttle and intake pre throttle. Any thoughts/ideas as to what's going on here?

[mb3000]

Maybe this can help:

Stealth 316 - Anatomy of the GReddy Type-S BOV

[Jimvr4]

Toni I pressure tested mine a while back and it didn't hold much past low 20s. Might need to upgrade

[Toni]

Interesting. That seems to conflict with the 25-30 I have seen on the webs. I'll have to test mine as well, maybe the oring on mine is damaged and I didn't notice when I inspected.

[NOMIEZVR4]

C'mon man...you know you want to upgrade your BOV...its one of the most exciting mods anyone can do!

[Toni]

Haha yea, love spending money on top of money

[Chris@Rvengeperformance]

metal evo bov is cheap or if you want something more bulletproof the tial qr will fit in the stock location

[Toni]

I am blow through. Looks like there are some greddy adapters out there for HKS and TIAL so I wouldn't have to get a flange welded on if I move to another.

[NOMIEZVR4]

Hey I've got a metal evo BOV if you're interested FYI..

[mb3000]

I prefer the HKS SSQV myself, the Evo guys don't like their factory BOV's for high boost, which is why there are always used ones available.

I think Dave was going to do a back to back dyno to see, not sure if he ever had time to do it.