First off this is on my 93 rx7. I just replaced my factory bov with an hks bov. Now the car is lacking power above 4500 rpms. Like its not boosting at all. The bov is vented to the atmosphere so you can definitely hear it. But I'm not sure why the power is gone. Help me out guys!

 

You could possibly have a boost leak

 

Something probably isn't hooked up right.

Could you have it hooked up backwards?

 

^ lol - I don't see how that would even be possible.




It's probably leaking. Try adjusting the spring and then recirculating it. (Hose from BOV opening to turbo inlet duct.)

BOV's are fail points. It's very possible that the BOV you have just put on is where your issue is directly coming from. I plan on removing my BOV soon... Plenty of people run without them. They are only an emissions device that companies exploited the **** out of. Sure, they sound cool... But they're not necessary. Read threads about removing the BOV... You'll see a lot of people talking about "compressor surge". Once you've read through all of the B/S, really focus on what the experienced rotary enthusiasts say.

 

Well, the previous owner setup the car up as a parallel setup. For one that sucks cause I have never messed with a rotary in my life or a turbo car. So while I rack my head around the whole boost idea I find myself looking at diagrams that aren't gonna help me out because the car has already been toyed with. The air pump assembly was already removed when I bought the car and so was the AST. The car feels correct whenever its below 4500 rpms. When I had the factory bov on the car, once the car hit 4500 you would hear the charge relief valve expelling the boost and I would have no power but the car would still climb very slowly in the rpms to redline (which I never do cause the tach is very jumpy). SO I read up a little and found that putting the factory bov in place of the crv would be a temporary fix that would work. Well, that failed... If it makes a difference, there is a loud deep intake sound at 4500 rpms for a split second then it goes away. There are not any rotary shops around where I live so I am kind of screwed in that department. Let me know what ya guys think.