BOV Pressure Testing: HKS, Forge, Stock
Originally Posted by EvoIXMR
since you had the HKS apart, anything that can be done for drivability issues I keep hearing about or do you think it cannot be fixed somehow?
Throw the MF-er away
I don't suppose that you could source a Greddy Type-RS for testing, JJ?
Another thing to note is that I have noticed, at least on the Greddy BOVs, is that once they are warmed up, they work better (i.e. smoother part throttle driveability) but seem to hold slightly less boost).
l8r)
Another thing to note is that I have noticed, at least on the Greddy BOVs, is that once they are warmed up, they work better (i.e. smoother part throttle driveability) but seem to hold slightly less boost).
l8r)
Originally Posted by EvoIXMR
since you had the HKS apart, anything that can be done for drivability issues I keep hearing about or do you think it cannot be fixed somehow?
I just got back from a run w/ the HKS BOV and it works really good (except for stalling). There was no part throttle surge and held boost fine. I couldn't run it in recirculation mode due to it not fitting w/ the stock I/C pipes and the stock BOV hoses. All the kids playing at the local school thought it sounded cool too. It is loud.
I think its a really nice BOV, but it just doesn't work for MAF systems. It would work great w/ a MAP system.
Originally Posted by Ludikraut
I don't suppose that you could source a Greddy Type-RS for testing, JJ?
Another thing to note is that I have noticed, at least on the Greddy BOVs, is that once they are warmed up, they work better (i.e. smoother part throttle driveability) but seem to hold slightly less boost).
l8r)
Another thing to note is that I have noticed, at least on the Greddy BOVs, is that once they are warmed up, they work better (i.e. smoother part throttle driveability) but seem to hold slightly less boost).
l8r)
If someone wants to send me one for testing, I wil pick up the return shipping.
Originally Posted by jj_008
Unless, someone is going to send me one, I won't have access to anymore BOV's. Most EVO owners around here don't have many spare parts or BOV's lying around.
If someone wants to send me one for testing, I wil pick up the return shipping.
If someone wants to send me one for testing, I wil pick up the return shipping.
FYI, I checked the part number on the JDM MR DV & the IX DV and they are the exact same. I know people already know they're the same, just wanted to let everyone know they are a 100% the same.
Originally Posted by jj_008
There isn't much that can be done. The diaphram just doesn't seal at idle which means it can't provide enough vacuum at idle to keep the EVO from stalling. I even annealed the spring which made it softer and it still wouldn't open the valve at idle.
I just got back from a run w/ the HKS BOV and it works really good (except for stalling). There was no part throttle surge and held boost fine. I couldn't run it in recirculation mode due to it not fitting w/ the stock I/C pipes and the stock BOV hoses. All the kids playing at the local school thought it sounded cool too. It is loud.
I think its a really nice BOV, but it just doesn't work for MAF systems. It would work great w/ a MAP system.
I just got back from a run w/ the HKS BOV and it works really good (except for stalling). There was no part throttle surge and held boost fine. I couldn't run it in recirculation mode due to it not fitting w/ the stock I/C pipes and the stock BOV hoses. All the kids playing at the local school thought it sounded cool too. It is loud.
I think its a really nice BOV, but it just doesn't work for MAF systems. It would work great w/ a MAP system.
Newbie
Joined: Feb 2006
Posts: 7
Likes: 0
From: Dallas, TX
Originally Posted by EvoIXMR
Where you VTA or recirc on this run? Just curious coz some people say they have no issues when re-circing...Thanks!
Originally Posted by jj_008
I couldn't run it in recirculation mode due to it not fitting w/ the stock I/C pipes and the stock BOV hoses.
the problems aren't so much with the recirculation but with the fact that the valve doesn't open well under vauum. look into jj008's thread on bov testing or reference the end all bov thread.
Originally Posted by EvoIXMR
Where you VTA or recirc on this run? Just curious coz some people say they have no issues when re-circing...Thanks!
Today, I tested the old Forge DV w/ the red spring and it held over 45psi. This was with no shims. It also required around 10inhg to open it, so it will cause stalling for guys w/ cams. Cars w/o cams may not have the stalling issues.
I will test the other springs at a later date. I need to buy new bolts for the BOV. I have taken it apart so much that the allen heads are starting to round off.
On another note, I dyno'd my car yesterday w/ the Forge RS BOV and even w/ my Samco hose it still was leaking really bad at the lower port. For this BOV, I am going to need a T-bolt clamp or a higher pressure worm clamp. The Forge RS is the only one that has given me trouble. The others seal just fine w/ a standard worm clamp.
I will test the other springs at a later date. I need to buy new bolts for the BOV. I have taken it apart so much that the allen heads are starting to round off.
On another note, I dyno'd my car yesterday w/ the Forge RS BOV and even w/ my Samco hose it still was leaking really bad at the lower port. For this BOV, I am going to need a T-bolt clamp or a higher pressure worm clamp. The Forge RS is the only one that has given me trouble. The others seal just fine w/ a standard worm clamp.
Originally Posted by Evo_Kid
If you pick up both shipping charges (to & from), I have an extra JDM MR DV you can use. Sorry, Im poor.
FYI, I checked the part number on the JDM MR DV & the IX DV and they are the exact same. I know people already know they're the same, just wanted to let everyone know they are a 100% the same.
FYI, I checked the part number on the JDM MR DV & the IX DV and they are the exact same. I know people already know they're the same, just wanted to let everyone know they are a 100% the same.
.
