forge blow off valve help

Castig3

Member
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Mazda protege Mazdaspeed
i recently purchased a forge motorsport blow off valve for my msp 03.5 but kinda lost on how to install it. i know that it is suppose to replace the OEM bpv but im just lost. i sound like a newb but i've only had the car for a year and waitied until it was all paid off to finally add aftermarket products.

heres whats on so far.
-custom exhaust
-injen cai
-SU front engine mount
-greddy turbo timer
-boost gauge
-and turbosmart boost controller

if anybody can help me out i would really appreciate it.
 
take off the BPV and all of the hoses connected to it. plug the cold pipe nipple with the bolt looking thing and clamp it. put the forge bov on the hot pipe side and connect the little hose on the top to where it used to come out of the BPV. i just did mine and it didnt come with instructions, ill take pics tho and show you...i just read what i wrote and i dont even understand sorry for not knowing all the right lingo, but i know how to do it so ill take pics.
 
i recently purchased a forge motorsport blow off valve for my msp 03.5 but kinda lost on how to install it. i know that it is suppose to replace the OEM bpv but im just lost. i sound like a newb but i've only had the car for a year and waitied until it was all paid off to finally add aftermarket products.

heres whats on so far.
-custom exhaust
-injen cai
-SU front engine mount
-greddy turbo timer
-boost gauge
-and turbosmart boost controller

if anybody can help me out i would really appreciate it.



Is the replacement a BOV or a BPV? If you are replacing the stock BPV with a BOV and you havent relocated your MAF to the pressure side pipe you might experience unfixable stalling. BOVs vent air straight to the atmosphere while BPVs recirculate the air into the intake. In order to run a BOV you have to either run both the BOV and the BPV or you have to relocate your MAF. If the replacement is another BPV you shouldnt have anyprobs just following the directions it came with. Its almost self explanatory just by looking at it and comparing it to the stocker.
 
here are some pics.
 

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Is the replacement a BOV or a BPV? If you are replacing the stock BPV with a BOV and you havent relocated your MAF to the pressure side pipe you might experience unfixable stalling. BOVs vent air straight to the atmosphere while BPVs recirculate the metered air into the MAF. In order to run a BOV you have to either run both the BOV and the BPV or you have to relocate your MAF. If the replacement is another BPV you shouldnt have anyprobs just following the directions it came with. Its almost self explanatory just by looking at it and comparing it to the stocker.

My MAF is relocated because of the CAI.
 
thanks mikeski for the pictures that helps out alot...........when you installed it did you disconnect the battery or no
 
YES. and when i reconnected it i guess it reset the alarm system so when i went to turn on the car, nothing happened!! i was like what the F*ck! then after ten minutes of sweating and not knowing what i just did, i pushed the unlock button on my keyless and it started right up!! hahaha i get no turkey either only takes like10 mins. let me know how it goes.
 
mikeski, thanks for the help it sounds a lot better to me at least theres no turkey anymore and once i get the boost up it should sound a lot louder. for now it sounds sweet
 
Can anyone get a sound clip of the way this sounds for me? thanks
mikeski think you could get a full engine bay shot to post?
 
So let me get this straight. This forged part that we are talking about replaces the Stock BPV. In the process of changing the part, you will get the sssshhhooooooooowsh that alot of us long for. is it similar to the Forge Motorsport Blow Off Valve Kit - Mazdaspeed Protege
[FMDVMSP01] that progetegarge sells? It it is similar to that how does that setup work VS doing the dual setup? What the advantages from doing one vs the other... Much help would be much appreciated...
 
well theres a "sssshhhooooooooowsh" that you get from a BPV and then theres a "pssssssssssssssssttt" that you get from a BOV.

ok now for my question, could someone more knowledgeable straighten me out on this.....

if i want to run a BOV without running a dual set up and not stall i'd need to
1. get hardpipes or a FMIC in order to weld a flange to
2. relocate the MAF to the pressure side (which is before the BOV?)
3. weld the flange after the MAF
4. bolt the BOV to the flange
5. adjust the BOV?

if anyone could set me straight it'll be appreciated
 
well theres a "sssshhhooooooooowsh" that you get from a BPV and then theres a "pssssssssssssssssttt" that you get from a BOV.

ok now for my question, could someone more knowledgeable straighten me out on this.....

if i want to run a BOV without running a dual set up and not stall i'd need to
1. get hardpipes or a FMIC in order to weld a flange to
2. relocate the MAF to the pressure side (which is before the BOV?)
3. weld the flange after the MAF
4. bolt the BOV to the flange
5. adjust the BOV?

if anyone could set me straight it'll be appreciated

Let me see if I can answer some questions for you.
You can have a Blow off Valve without running a dual setup BOV+BPV
You can do this without any other modifications if you get the right BOV. There are only a few BOV's out there that will work without stalling issues on a stock MSP. There are two types of BOV's out there. Single piston and Dual Piston/Diaphram. Single piston BOV= Greddy, HKS SSQ will not work on a stocker MSP without stalling issues if the BPV is removed.
Dual Piston/Diaphram BOV= Forge Motorsports (BOV) MSP01 kit. This is the one you see in the pictures on this thread. Another one is Samco Sport and Turbosmart Dual. They are designed to bolt right onto the stock MSP without modifications to MAF or anything else. You will not have stalling issues with these because of the Dual Piston design. At no or low boost you will only hear a quiet swoosh of air. When boosted up, it sounds great. This will allow the MSP to run smooth, no check engine lights, or other complications.
I have the Forge BOV and I like it. My set up is stock except for a SRI. When I put my SRI on, the BOV got way louder. I have never had my car stall or any dash lights come on.

Just remember, it depends on what you are planning on doing. Hope this information works for you.(mj)
 
Is the replacement a BOV or a BPV? If you are replacing the stock BPV with a BOV and you havent relocated your MAF to the pressure side pipe you might experience unfixable stalling. BOVs vent air straight to the atmosphere while BPVs recirculate the air into the intake. In order to run a BOV you have to either run both the BOV and the BPV or you have to relocate your MAF. If the replacement is another BPV you shouldnt have anyprobs just following the directions it came with. Its almost self explanatory just by looking at it and comparing it to the stocker.

Crash. Your statement is not entirely true. I'm not attacking you, but just throwing out an FYI. There are a couple BOV's out there designed to bolt right on a stock MSP with no stalling issues. These are known as Dual Piston/Diaphram BOV's. The only one's I can think of are the ones I listed in my previous post. If folks want to run a Greddy or HKS without recirc fittings, then yes... They will have to relocate the MAF. Greddy and HKS are single piston BOV's. It dumps the whole load to atmosphere immediately. The Dual pistons have two springs operating allowing air to vent 100% to atmosphere but not dumping its load all at once. (rockon)
 
i dont mind modding my MSP since im planning on getting a FMIC anyway. i want to get a greddy type s when the time comes, i just want to make sure i know how to set it up
 

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