Blowoff valve question

[MSP-BCH]

Agreed... post some pictures of ur setup

would you mind posting a pic of your setup so far, we can help you even more that way

 

[SteelWarrior]

yea ill take some pictures ASAP, i could use a decent signature as well

I could probably swing it tommorow, gotta take the car into the wash, damn snow.....

and yea that BoV sounds like an awesome idea, because from what ive read, if you vent into the atmosphere it doesnt improve perfomance at all, but sounds like i want it to, but if you vent in back into the system i guess it accelarates the turbo or some s*** like that (haha been reading every night on how this stuff works, ill get it yet )

but mainly looking for the sound bling, where i live most people run stock ricers, and im sure my car can destroy most of them, now im just looking for the rare effect

 

[icespeed]

yea ill take some pictures ASAP, i could use a decent signature as well

I could probably swing it tommorow, gotta take the car into the wash, damn snow.....

and yea that BoV sounds like an awesome idea, because from what ive read, if you vent into the atmosphere it doesnt improve perfomance at all, but sounds like i want it to, but if you vent in back into the system i guess it accelarates the turbo or some s*** like that (haha been reading every night on how this stuff works, ill get it yet )

but mainly looking for the sound bling, where i live most people run stock ricers, and im sure my car can destroy most of them, now im just looking for the rare effect

lol, there is nothing more satisfying than timing the blow off (or bypass) at the exact moment that you pass a ricer. If you time it just right, you can get it right where the driver window is. That gives you enough time to look over and see their "holy $hhh" expression. A split second later, you can see their car wobble a little in the rear view mirror because they weren't expecting that noise from a mazda protege! lol

 

[slomsprotege]

The reason our cars stall after installing an atmospheric BOV is because the ECU is programmed to read the recirculated air. Mazda used recirculating because when the BOV throws it back into the intake it helps aleviate the vaccuum that is made within the intake(thus helping keep the spool going on the turbo 500rpm earlier).

this is normal for all cars to have vaccuum(petrol cars at least, deisels run positive) when you vent to atmosphere, the computer is ready to read another 2.5cubic feet of air coming from the bov valve back into the intake. when you vent out that air. the MAF sensor sees that there is more vaccuum (air coming past it) than should be (the recirculation would cause positive pressure on the intake side) and then it floods the engine with fuel. it almost throws a complete 3.1 stoic (fuel to air mix) which this should be 12 to 1 or around there. and the way you keep the car alive (hit the throttle some) opens the butterfly valve in the throttle body and kills the vaccume to make the pressure in the pipe even with atmosphere (remember when off throttle its -23hg vaccuume) and then the ecu see good even air coming in and throws an ok mix of fuel.

un-hook the intake side of the turkey call, and cap the hole left and you will see what a pain in the arse it is to drive. i did that the first day i got the car to see what hassles i would have with tuning....... with all that said. keep in mind the fuel map reads from MANY other things like throttle position sensor, speed density, vaccuum, mass air flow, exhaust gas temp, O2 ratio in exhaust, RPM, Air Intake Temp. and there are more. just remember, to vent to atmosphere, put the MAF on the hot side a little in front of the throttle body. or go standalone Engine Managment System.

 

[bhosMSPRO]

lol, there is nothing more satisfying than timing the blow off (or bypass) at the exact moment that you pass a ricer. If you time it just right, you can get it right where the driver window is. That gives you enough time to look over and see their "holy $hhh" expression. A split second later, you can see their car wobble a little in the rear view mirror because they weren't expecting that noise from a mazda protege! lol

lol thats fun to do.. i might sound like a ricer but its hilarious seeing their face afterwards and them turning their head to look at what kinda car it was

 

[Blackrose]

The reason our cars stall after installing an atmospheric BOV is because the ECU is programmed to read the recirculated air. Mazda used recirculating because when the BOV throws it back into the intake it helps aleviate the vaccuum that is made within the intake(thus helping keep the spool going on the turbo 500rpm earlier).

this is normal for all cars to have vaccuum(petrol cars at least, deisels run positive) when you vent to atmosphere, the computer is ready to read another 2.5cubic feet of air coming from the bov valve back into the intake. when you vent out that air. the MAF sensor sees that there is more vaccuum (air coming past it) than should be (the recirculation would cause positive pressure on the intake side) and then it floods the engine with fuel. it almost throws a complete 3.1 stoic (fuel to air mix) which this should be 12 to 1 or around there. and the way you keep the car alive (hit the throttle some) opens the butterfly valve in the throttle body and kills the vaccume to make the pressure in the pipe even with atmosphere (remember when off throttle its -23hg vaccuume) and then the ecu see good even air coming in and throws an ok mix of fuel.

un-hook the intake side of the turkey call, and cap the hole left and you will see what a pain in the arse it is to drive. i did that the first day i got the car to see what hassles i would have with tuning....... with all that said. keep in mind the fuel map reads from MANY other things like throttle position sensor, speed density, vaccuum, mass air flow, exhaust gas temp, O2 ratio in exhaust, RPM, Air Intake Temp. and there are more. just remember, to vent to atmosphere, put the MAF on the hot side a little in front of the throttle body. or go standalone Engine Managment System.

Your info is not 100% accurate. The stall is caused from.........

While in boost the air passes throught the MAF and tells the computer X amount of air is headed through the system.

When the blow off valve opens this metered air is removed from the system. But there is no way for the computer to know the air is no longer going to the engine.

Because ECU thinks this air is still headed through the system if uses the amount of fuel it thinks it needs for the air to make the proper AFR.

When you recurculate youll notice that the air is returned post MAF. So that air still goes throught the system but is returned after the MAF so it does not get metered again.

Puting the BOV before the MAF (Moving the MAF near the TB) Means that when the BOV is opened the air exits the system prior to getting metered.

You said that the air is put back into the intake to aliviate vac. There is minimal and in most cases no vacume in the intake. Vac is issolated mostly to the IM. The intake (CAI/SR and IC pipes) are under atmospheric pressure or slightly higher @ all times in any FI car.

 

[SteelWarrior]

lol, yea see what i got in my area, is a bunch of daddies little boys driving around in probes/civics, the odd eclipse, stuff that my old Z22 cav stood a chance of taking if i came off the line hard haha...but yea, theres gonna be a huge sense of pride when the car i PAID for all myself (cause im pretty young, just turning 20), blows past them, and its all body kits here, all flash and no boom....so im looking to throw in my BoV, turbo timer, fog lights, new subs, maybe some steel intercooler piping to flash up the bay a bit more, and rip some faces off, cause even today the roads were pretty dry and lots of sand, and some goof in a older V6 wanted to go, and its the first time since i got the car that ive punched the throttle and not had my expensive brand new winter tires just spin...yea....was a very short race haha, <3 the boost timer


lots of people complain about there speeds on these forums and them not working properly...but i paid way more then i should have for my speed and i still havent even had a seconds regret i looked at all the dealers in my city for like 2 weeks, couldnt find anything i liked, found the silver speed and instantly fell in love, i couldnt believe it was a protege and that it was mostly stock


but yea il take some pics and if someone could help like MS paint circle the main areas that ill need to focus on for this little spring project that would be great, ill start reading up on all the areas around it so i dont break my baby

 

[Alejo_NIN]

lots of people complain about there speeds on these forums and them not working properly...but i paid way more then i should have for my speed and i still havent even had a seconds regret i looked at all the dealers in my city for like 2 weeks, couldnt find anything i liked, found the silver speed and instantly fell in love, i couldnt believe it was a protege and that it was mostly stock

is not that we don't love the MSP..heck, i searched mine for over 4 months!!!
i've never had second thoughts and i've actually managed to save a few MSP's from getting either junked or sold.

is just that the msp is missing alot of stuff..and trying to get the missing stuff in costs alot of money, sometimes makes you think twice before doing it coz you think you could've done better had you gotten another car to begin with.
but still...my car is completely stock on the outside, its 4 yrs old and people still tell me my car is beautiful....

 

[icespeed]

lots of people complain about there speeds on these forums and them not working properly...but i paid way more then i should have for my speed and i still havent even had a seconds regret i looked at all the dealers in my city for like 2 weeks, couldnt find anything i liked, found the silver speed and instantly fell in love, i couldnt believe it was a protege and that it was mostly stock


but yea il take some pics and if someone could help like MS paint circle the main areas that ill need to focus on for this little spring project that would be great, ill start reading up on all the areas around it so i dont break my baby

Please do not ever say you've payed way more than you should have for your car - heck, any car. If you payed x-amount of dollars for your car, then that is exactly what the car is worth to you. When my msp is payed off, I will have invested $47,023.00, that's just to have it running.

I have no regrets. Most of us don't. I'll still complain (although I try not to) like the rest, because certain things just make you stop and say, "wtf were the engineers thinking?". Our cars were the stomping grounds for the "public" mazdaspeed deptartment. They got a little better with the speed miata, they got a little better with the speed6. They pretty much got it right with the speed3. People who really have a problem with the MSP don't drive them anymore. They get rid of them because of the "headaches".

With any car, though, once you start messing around with it, problems will arise. You have to accept them and solve them, not just come to the forums and cry about them. We are all here to help, answer questions, make suggestions, etc.

When you have a question, let us know!

 

[SteelWarrior]

lol cool appreciate it


and yea the cost comment is accurate but i still wish i hadnt gotten 9% interest on my loan haha


but yea, engine bay pics coming soon!

 

[S.A.MSP]

9%? ur lucky, mine is 20%, my $12,500 car is costing me $24,000, i'm a first time buyer

 

[SteelWarrior]

hehe fair enough, mine is coming out to approx 25 000 by the time its paid off

and first time buying from a dealership as well

 

[sk8er_jason04]

heh i got 14.9 first time buyer, my msp 03.5 should be 16,000$

 

[Alejo_NIN]

i got a 9 and i thought it was too much....first time buyer