Help about hks bov
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From: Virginia Beach, Virginia
If you running Stock ECU and depending on the year of the car I would suggest going with a stock style BOV/DV. The problem with running VTA even if you car doesn't stall(some won't) when you shift your dumping excessive fuel thus wasting gas. I had the HKS on for a while and a few things I noticed was part throttle boost the HKS would pull then I would get a violent bucking. I would go with APS twin vent. IMHO the bost stock style bov you can run. Ask Mellon he is runniing it to 40psi holds boost just fine. I'm going to be changing my setup and be running meth with 30-35psi and I know I will have no isses with the APS....
There was a video with this dv posted on youtube, but I can't source it at the moment...the metal dv is not sequential, just one recirculating blow-thru; more audible with an open intake though. function over design aspect is a no brainer, espescially if you are currently running strictly VTA.
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From: South Beach, FL / Miami, FL / Pt. St. Lucie, FL / NYC
Evolved Member
iTrader: (7)
Joined: Sep 2004
Posts: 1,457
Likes: 0
From: South Beach, FL / Miami, FL / Pt. St. Lucie, FL / NYC
God Damn
Yeah I had the same POS. Don't get me wrong the HKS is a great BOV cause it won't leak but for the EVO on stock ECU no bueno
Oh and BTW sound means nothing. If you make 5 psi and shift and hear flutter=fail. If you notice you gas mileage goes down=fail. I'm making more power now and I switched BOV's and I'm getting close to 28mpg's now. I was getting 18 before.
Originally Posted by mitsuevodriver
Yeap im running the aftermarket. Not the stock. The hks bov is on the aftermarket pipe.
Oh and BTW sound means nothing. If you make 5 psi and shift and hear flutter=fail. If you notice you gas mileage goes down=fail. I'm making more power now and I switched BOV's and I'm getting close to 28mpg's now. I was getting 18 before.
Bucking
I had the same issue with the car bucking hard at full throttle when it was cold out. If I stepped on the gas gradually, it wouldn't do it. That's when I had the HKS BOV venting into the atmosphere with the stock up pipe. Then I recirculated it and didn't have the issues anymore.
After doing a boost leak test, I heard the BOV leaking. I returned to the stock Evo 9 BOV and haven't had any issues since. I run 25 psi daily now and haven't had any issues. I miss the sweet sound of the HKS venting, but am happy with the reliability of the stock 9 one.
After doing a boost leak test, I heard the BOV leaking. I returned to the stock Evo 9 BOV and haven't had any issues since. I run 25 psi daily now and haven't had any issues. I miss the sweet sound of the HKS venting, but am happy with the reliability of the stock 9 one.