i just ordered my hiboost fmic and ive been reading up about the BOV that it comes with. nobody seems to like this. somebody please explain in detail what the pro's and con's of getting the greddy type-s would be. is the only difference in the sound? somebody please help, thanks.
pros and cons of the greddy type-s
- Thread starter grcuadros
- Start date
StreakinOraNgeX
Member
- :
- Mazdaspeed Protege 03
cons are your gonna have to go with the dual bpv/bov set up, the car will stutter once in a while at idle, and the bov at idle will sometimes make a squeaky drone.
another question...people have been saying that their car feels slower when they put the hiboost fmic on. my only mod is a joep mbc. am i gonna have the same problem? what do i need to get in order to experience the full effects of the intercooler. some sort of engine management? exhaust? downpipes, etc? any help is appreciated. thanks.
speedhawaii
Member
i love the type s sound
there is never a reason you HAVE to go with a duel set up. i know people running turkeyless with single BPV's . venting is always gonna make you drive like ass (idont care what anyonesays) unless you have a befor and after dyno/track run to prove to me that the car runs better and faster while ventingStreakinOraNgeX said:
i dont wanna hear it. venting a MAF car = a bad thing
speedhawaii
Member
matter of adjustment
Ok lets get this straight I have the hi boost kit so what your saying is if you install the greddy bov you must use the hks bpv they sent with the kit. Is this correct? Also does the greddy bov bolt right on to the flange and replace the hks? please explain to me.
There is a separate flange mounted on for the Greddy, so all you do is bolt it on and adjust it till you get the perfect non-stalling/turkeyless/whistling sound combo. Don't let anyone tell you there is no purpose to a BOV. See, when you are accelerating the TB is open, and the turbo is spooling up and pushing air to the TB. When you suddenly let off the gas to shift, the TB closes and the turbo is still pushing the air to it. That air has no where to go so it goes back toward the turbo and causes "cavitation" of the air forcing against the turbo. This will cause unnecessary wear on your turbo. Also, when you shift quickly you want the turbo to run efficiently. The BOV lets that air the turbo is pushing out to the atmosphere, and your turbo stays "spooled up" so when you hit the gas after the shift it is not slowed down by all of the backpressure. So there is a safety and performance plus to having a BOV. The reason you don't hear the turkey on the stock car is because when you put an aftermarket intake on your car there is more air being easily used by the turbo, and thus there is more potential backpressure. Now, the reason people use a dual BPV/BOV setup (including me) on our cars is this: our stock computer is setup to "think" the car is using a BPV, which basically does the same thing as a BOV except it diverts the air back to the intake after the MAF. So, our car believes that air is going back to the intake. When people use just a BOV, it is going to the atmosphere only. So there is less air going in than the car believes, and thus more fuel is dumped. This causes a stalling when your car goes from revved to idle. People have come to a happy medium by using the dual setup. This gets the best of both worlds. I do not stall, I really have to abruptly shift to get any turkey sound (and it is barely audible), and my Greddy BOV sounds awesome. Hope this helps.
well then my next question would be if i run the dual setup, greddy type-s and a BPV, some of the air will be recirculated and some released to the atmosphere, right? if thats right, how can i effeciently run this setup? thanks alot for all your help, that cleared up ALOT of things. thanks again.
There is a big thread on the dual setup. To run it you just keep the Stock BPV like it is and get a flange welded to your hardpipes (if it doesn't already come with one). You can then just adjust your Greddy until you rev your car up to a high RPM and when it comes to idle it doesn't stall. It only takes a few minutes. I imagine if you ran a standalone you could get around this problem with the MAF to computer and run just the Greddy. There are people running just BOV, but they can't vent as much so their BOV won't be as loud and they might get a bit more cavitation (turkey). You would have to ask them on the specifics because I have only had the dual setup.
jurgs01 said:
GRR ... why does everyone ignore the fact that like 50 of us are running open vent and no BPV and having no issues at all ... there is no point to keeping that crappy looking plastic BPV in there. If you dont know how to adjust the greddy... take it to a tuner shop and spend 30 mins getting them to do it right. BTW ... im not jumpin on you man ... i just hit reply on your message for the hell of it.
Notorious said:
No it isnt, i ran it also. So have a bunch of other guys. If you get the 19mm attachment you are essentially reducing the amount of air that escapes by making the vented area smaller. Just requires its own vacuum source and proper tuning.
not to mention some of these people are trying to run a BOV using stock plastic pipes and epoxy...and hell maybe even duct tape. That just isnt a good idea, get yourself some hardpipes before experimenting with a single BOV.
umm buddy im running a fully custom setup here with fmic, hardpipes, dedicated line and everything, not stock pipes. This is not the first time I did this. A check valve made it surge even more. I removed one spring but then I had it leak under idle, with the valve it just went back to surge. I can make it work by cutting the spring and making a large metal return pipe back to the intake. After I tried Seth at SPD racing tried to make it happen with a single bov and it didn't work. If he can't get it to work im positive it can't be done with my setup. We spent hours trying to get it to work. Its great that it works on your car, but keep in mind due to different variances in cars what works on your car might not work on mine and vice versa.
mattybo said:
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TX Speed Demon
Member
Mine works fine with the Type S too. Once I adjusted the vlalve spring had no problems.
VAmazdaspeed
Member
- :
- 2003.5 MSP
VAmazdaspeed said:
You are re-circulating. I think we are debating over vented BOV's without a dual setup. And yes Notorious i will agree each MSP is different however i know it can work because mine has worked, along with other people. I guess it's just the luck of the draw.
