03mazdashawty said:
I was listening to some sound clips of the HKS SSQ BOV...that is exactly the sound i am looking for. What all do i need to purchase in order to apply that bov to my MSP?...do i need any kinda of special application, kit, etc.
to do it properly requires some investment. normally, a flange is welded to a pipe and the bov is attached to the flange. unfortunately, we have plastic piping. not exactly something you can weld. there are a couple of things you can do.
1) hardpipes. replace the stock piping with ones made of metal....either aluminum, aluminized steel, or stainless steel. there are a few kits out there. some are hardpipes only. some are a side mount intercooler upgrade kit. and some are front mount intercooler upgrades. most, if not all, can come with a bov flange already welded to it so all you need to do is attach the bov. these kits can get expensive though but are well worth the money.
2) you CAN make the ssqv work with the stock pipes. there's actually a how-to on this forum that details the install of a bov on the stock pipes.
or you can get a special flange for the ssqv and instead of having the flange directly attached to the piping, you run a hose to the bov instead - kinda like the stock setup.
i will warn you though....if you choose to go with a bov only, you stand the very good chance of stalling. this can be dangerous if you stall on the highway....cause you'll loose power steering and power brakes. the reason is the maf.
alright here's how your maf works together with the ecu to keep your engine running. air flows in through your intake and through the maf. the maf does exactly what its name implies, it measures the amount of air that passes through and sends this data to the ecu...."hey ecu, i've got this much air headed to the engine". the ecu then tells the fuel injectors, "inject this much fuel at this particular time to create this air/fuel ratio so i can keep things running smoothly".
well everything's fine and dandy until you take your foot off the accelerator and the bov opens. see, the bov is placed AFTER the maf, usually about 6-12 inches from the throttle body. well all that air that the maf already told the ecu was coming, goes out the bov instead when it opens. the air never makes it to the engine. so the ecu is expecting all this air and dumps in the proper fuel amount.......but wait, where's the air??
result? your cylinder chamber is swamped with huge amounts of fuel and no air (oxygen) to make it go boom. your engine's running way rich and this can cause you to stall out.
the fix? a couple ways:
reroute the air back into the intake. this effectively turns the bov into a bpv....just like the stock setup. by rerouting the released air back into the intake AFTER the maf, your whole intake system stays closed....that is, there are no openings to the atmosphere. all that air that the maf counted is still in the system so the ecu gets the air it was expecting. bingo, no more stalling. the ssqv has a recirculation fitting that you can buy for it. the downside? see the front of the bov and that triple fin insert? you have to take that out to put in the recirculation fitting and by doing so, you'll lose that whistle.
on some fmic kits, there is an option to run what we call a dual setup. you run a bpv AND a bov together. so you're sending some of the air back into the intake and releasing some of it into the atmosphere. it works out that the ecu gets enough air to keep the engine from stalling out so no worries on the stalling anymore.
the most expensive fix, but the "proper" way to fix it, is to get a fuel controller of some sort. many fuel controllers nowadays have a feature that allows it to pull fuel to account for the loss of air from the bov. in effect, it keeps the a/f ratios in check so that you don't end up running super rich. problem is, there aren't many products to choose from that work for our car that have this feature. the ones that can do this are pricey.
lot of things to deal with huh? if i were you, i'd save up until you can do it right in one shot.
