Celica Forums General Discussion Exterior Stock Airbox with BOV intake

I realized that there are some benifits of keeping the stock air box and thats what I did and I also added in a TRD drop in air filter. But I figured that the stock air hose isn't making the air flow efficient. So I'm thinking about taking a cheap CAI from ebay and cutting the pipe and using that pipe to replace the air hose. And because of the butterfly valve in the airbox I'm also considering attaching a BOV to this pipe so that when the butterfly valve in the air box and throttle closes that pressure will be released for better efficiency in both of the valves. I don't know. Any opinions? You think there's much pressure to even worry about? And dont try to talk me into getting an intake system b/c I've seen the disadvantages and it weighs out more than the advantages and there's not much HP you get for the price.

if you somehow pull this off..please post pics..sounds kinda interesting...but dont waste your money on piping for the airbox..the stock one is just fine...i dont know about the BOV thingy..but like i said..give it a try

yeah I think this is nonesense but hey there is always someone trying something new.

I agree

post pics.

dude, first of all... i dont think this is going to work with the BOV cause i just think that there is not going to be enough air pressure... and second of all its all worth the try... what ever the outcome is, post a picture to show your creativness...! Good Luck.

Very Rice. What are you trying to achieve doing this ? 1 HP and a little embarasment?

wtf..
it won't even work, BOV work with boost, not with nothing.

I'm not sure what you are exactly trying to accomplish with this? If you don't want to spend the $$$ on a CAI why wouldn't you make one? The BOV definately won't work because there is no boost creating any presure. If you wana try it, go for it. But it sounds to me like you have no idea what you're even talking about.

the BOV wont work, it needs to be way more pressurized than any intake can pull in.

^^^ Well i guess we will see when hes all finish

I guess you didn't read. I was going for efficiency which to me means less drag and something that will always stay constant.

correct me if i'm wrong. and i could be but the purpose of a bov is to relieve pressure that is created between 2 closed points such as the turbine and the throttle body. most force induction setups that uses a turbine normally have this distance far apart. the pressure is still high even though there is distance. so if you do own a celica,think about it, wouldn't there be some sort of high pressure between the short distance of my throttle boddy and my butterfly valve of my air box? you never tried this before so you wouldn't know if it works. it won't be a waste of money b/c imma go see if i can salvage a stock BOV from the salvage yard.

true...but the 2 points must have a minimum pressure difference. I dont think inside those intake pipes create more than 2 psi

i dunno wtf you're talkin about

it would be cheaper to buy the intake than the BOV...lol

It seems to me that you want the sound of a BOV without the cost of a turbo than effeciency as you stated in your post. I know you said you don't want to be talked into buying an intake but why not just get one? Such as TPR which they say doesn't bog. I mean, you can go ahead and try whatever you want because it's your car but if it was me, i would rather go with the crowd with something that worked and not waste my money if the whole thing didn't turn out right. That's just my opinion.

BOV are mounted on the intercooler piping that connects to the intake mainifold... it will not work without pressure... dumb dumb

there is a pressure difrence but its a vacume when the tb is open and when closed theres nothing no flow so the bov would be useless butterfly jsut cloase's under a certain rpm i think it was like 2 grand or something not to mention a bov doesn't usally take any type of vacume input so it would jsut sit there and cost you 120$

the piping down isn't that bad of an idea but it would just be easyer to install a cai ten hacking one apart to attach to stock air box

just...don't do it...

just drill come holes and be done with it

it wouldn't work anyway, that is possibly the dumbest thing i have ever heard.

Everyone is so pessimistic. No one will believe that it'll work until I build it. I'm not saying it will work but all i'm saying that it could and you will never know until you've tried.

it can't work because of the way a BOV works. The piping will work. However a BOV needs a certain amount of pressure to work, and it's just not provided in the intake. Have fun wasting time and money

yea theres some things i will say try even if i think they won' work but there is no way this will work the bov portion its jsut not gonna work

why waste a CAI ?

go to an import shop and ask someone who installs turbos n' stuff...he will you wether or not your idea could work...if it works..splooge on me..if it doesnt..splooge on you...

DOOO ITTT!! i think it would be fun if you fabricated it to work somehow. I personally think the cost of the pvc intake parts plus a bov = a good used cai. again not trying to make you buy a cai.

how much pressure do you think a BOV needs for it to work? but i mean thats the point of the BOV. if there's too much pressure it'll get release. some of ya sound like there won't be enough pressue to make the noise. thats just sounding like and thinking like a ricer. i'm not going for the turbo poser look.

I probably won't get much HP spending 250 or more on a CAI (thinking about an Injen). I'll probably get a better throttle response but it seems like its to costly just to get a few HP. I mean i could get the generic ones on ebay but those have never been tested and probably have never been fitted to a celica before. I mean if the diameter of the piping is too big the MAF sensor will get some kind of messed up reading and i'll be in a mess. B/c my MAF sensor is connected to the air box and b/c the intake hose is just a hose with nothing attached replacing it with a pipe is just an easy way to increase efficiency. They've got kits like these for cars like the EVO, the VW GTI, and the Lexus IS300 and the purpose is to really improve efficiency of the car. I'm also trying to keep my car quiet especially when driving on the interstate. But I might just take out the BOV idea out. I figured i can benifit from the pressue if any. B/c once the throttle body opens up again the air will just ram itself into the manifold with all that pressure build up.

hmm...i do wonder if there is enough pressure to ATLEAST let the blowoff valve make a sound. What do some of you guys think on this. Even if a person was to to this, where would it be mounted? Usually blow off valves are rated fron 6 -25 psi or something like that and i don't think the intake even makes 2 psi..so that's why i'm skeptic that something like this wouldnt work. It doesn't even come close to the minimum PSI. I'm not going to do this but was wondering. I seen posts like these all the time, and maybe i can give another person good info next time i see something like this.

there is no pressure in the intake and theres not enough vacume coming from the enging to open the bov period.

bov will open at really high vacume which if it would open would end up letting air our of it casue thats what its made to do while the butterfly opens at very low vacume and lets a lot of air in

its comparing apple and oranges yea there both a fruit but thats where it ends


yea you could do all of this yea some dumbass that doesn't know his ass from a cresent wrench might belive you have a turbo by seeing a bov but its compltly useless it will not do anything nothing at all

and an intake doesn't even creat 1 psi and change in pressure will be a negative (vacume) untill the throtle body close's in which case the air will instanly stop even even with a ram air system nothing will happen no pressure no bov needed

oh and i have a ebay sri and it works perfectly fine and piping usally will not be bigger/smaller becuase it has to atach to the throttle body so they tend to keep it the same size... even the ebay ones

anyone else?