Now that i got your attention.

What BOV should i use? I'm getting a FP black soon, and will have built engine, and lots of other goodies under the hood, also tuned with E-85. just don't know what BOV to use, i have the Stock EVO 9, and i just don't know if that will hold the PSI's i wanna push or maybe it will. well please hope someone can help me out. thanks.
MIKE
Also car is a 05 EVO 8 MR

 

Fathouse ran 10.2 on the stock BOV.

 

how much PSI was he running though?
MIKE

 

on my 8 mr in order of replacement
stock plastic, greddy type rs, sysnatic (is that how you spell it/?) tial vta (my tuner recommended)

 

synapse(new version) or aps twin vent(i run this one, fp red on e85)

 

personally i wouldnt get the type rs. my boy had that and he blew the valve straight off the charge piping. that was at about 30 pounds though. he switched to tial and its been driving fine now

 

TiAl FTW /thread

 

how much boost you plan on running? are you on a stock bottom end? If so you probably won't be able to run a high enough boost so a "crushed" stock bov might be sufficient for quite some time but if you want you can get the new synapse bov that recently came out that's my $0.02......

 

been trying to get the aps twin vent bov, no one is selling them

 

Aps twin vent( i run this one) or tial all you really need.

 

The Synapse design beats all the old types. No diaphragms to blow, no fiddling with different springs to find the right one, and it holds 150psi without a hitch. It just works.

 

Tial.

 

the new synapse in pull orientation.

for me, my new synapse dv drives as good as the metal 9 bov, holds more boost & has better ramp up response.

when i was target 28psi for my evo9 bov, i swapped valves & went to 30.5psi without changing the duty map!

I havent tried running more boost, but i know it will hold it with ease.

 

Im gonna have a built motor with Manley I beams, and Weisco pistons 9.0:1 compression, HkS 280 cams, and the list just goes on and on. will look into the BOV you all have said. thanks.
MIKE

 

+1

It couldn't have been said better. I ran a tial before (stock turbo, fully bolted, sd, 25-26lbs), and had major surge issues. Tried a couple springs (7lb and 11, also cut 11). Swapped to synapse, connected with just port A, no more surge. At all. It works.