Help with Forge BPV FMEVO15: Spring Question
Mar 23, 2009, 11:06 PM
#1
Help with Forge BPV FMEVO15: Spring Question
Hi, does anyone use this valve, or have used this valve?
I got the little sheet that showed the different spring rates.
I loaded the yellow in their thinking that the 15~23 psi it was rated,
would be the right one for the job. However, pushing on it with my fingers, it seemed to open easier than the stock black plastic one it replaced.
Anyone know what spring I should use to hold 22 psi?
This is going on a stock evo 8 with mild upgrades. 22 psi is the goal.
Thank you in advance.
I got the little sheet that showed the different spring rates.
I loaded the yellow in their thinking that the 15~23 psi it was rated,
would be the right one for the job. However, pushing on it with my fingers, it seemed to open easier than the stock black plastic one it replaced.
Anyone know what spring I should use to hold 22 psi?
This is going on a stock evo 8 with mild upgrades. 22 psi is the goal.
Thank you in advance.
Mar 23, 2009, 11:18 PM
#2
Found my answer here --> https://www.evolutionm.net/forums/ev...-bov-help.html
Ok, for clarification then, you do not have our Type RS valve. You have our direct replacement valve which is part numbered FMEVO15.
At 22 PSI, I would recommend using the Blue colored spring in our valve.
One thing that you might want to try, is reversing the orientation of the installation of the valve. This means switching the orientation of the two larger ports of the valve. When this is accomplished, the pressure will be entering the side port of the valve and recirculating back into the intake through the bottom port. This may help improve airflow through the valve such that it will help to minimize the partial throttle fluttering.
You will always have SOME fluttering at partial throttle when using an aftermarket valve, again, due to the inability to incorporate the pressure equalizing channel along the back side of the valve that OEM valves use. You will be able to minimize it a great deal, however.
At 22 PSI, I would recommend using the Blue colored spring in our valve.
One thing that you might want to try, is reversing the orientation of the installation of the valve. This means switching the orientation of the two larger ports of the valve. When this is accomplished, the pressure will be entering the side port of the valve and recirculating back into the intake through the bottom port. This may help improve airflow through the valve such that it will help to minimize the partial throttle fluttering.
You will always have SOME fluttering at partial throttle when using an aftermarket valve, again, due to the inability to incorporate the pressure equalizing channel along the back side of the valve that OEM valves use. You will be able to minimize it a great deal, however.
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