View Full Version : Forge Motorsport Bypass Valve?
KatDiesel
06-17-2007, 09:28 PM
Forge Motorsport Bypass Valve - Mazda CX-7
"Direct Replacement bypass valve for Mazdaspeed 2.3 DISI engines!
You’ll notice improved throttle response, better boost handling capacity and quicker spool recovery. Machined from Billet aluminum the MSP02 is completely tunable and serviceable to keep up with your modifications as they progress.
Installation is simple and takes less than 10 minutes requiring no modification to the factory plumbing. The BPV comes with Forge’s “No Hassle” limited warrantee and is available in polished or black anodized finishes."
Anyone using this product yet? I love the look....simple......and its only $169.95. I don't see the point in buying a BOV when we don't vent anyhow? I'm considering picking it up soon, just checking to see if anyone else has it......
KatDiesel
06-18-2007, 10:26 AM
Forge Motorsport Bypass Valve - Mazda CX-7
"Direct Replacement bypass valve for Mazdaspeed 2.3 DISI engines!
You’ll notice improved throttle response, better boost handling capacity and quicker spool recovery. Machined from Billet aluminum the MSP02 is completely tunable and serviceable to keep up with your modifications as they progress.
Installation is simple and takes less than 10 minutes requiring no modification to the factory plumbing. The BPV comes with Forge’s “No Hassle” limited warrantee and is available in polished or black anodized finishes."
Anyone using this product yet? I love the look....simple......and its only $169.95. I don't see the point in buying a BOV when we don't vent anyhow? I'm considering picking it up soon, just checking to see if anyone else has it......
Thought I posted the link.....guess not.
Here is where I found it :
Forge Motorsports (http://www.forgemotorsport.com/content.asp?inc=product&cat=0006&product=FMDVMAZ3)
And here is where i found the price:
Price (http://mazda3online.web.aplus.net/product_info.php?products_id=1077)
I think I will fire off an mail to Forge and ask for more info. I'm not looking for any sound from a BOV...just want a better than stock solution.
1Sleepy93
06-18-2007, 02:35 PM
Don't have it but have been thinking about picking up a BOV. The stock one is rumored to leak on these motors and a quality aftermarket one should hold boost better.
lisevolution
06-19-2007, 02:46 PM
If you're just replacing the BPV with another one that is the same but better, I'd skip the Forge. Coming from the MSP community where there have been many users of their products, the reviews have been mixed at best. Most people have felt that they just aren't that good quality wise. I'd look into a boost sciences diverter valve if your just looking for a stock replacement
hectik1
07-01-2007, 09:40 PM
I have had a Forge BPV on my Evo for almost the whole life of the car.....nothing but good things. Holds 23 psi with ease!(headbang)
jb_pdx
08-14-2007, 04:24 PM
About to order this... Anybody have the CP-e Intake (Or really any intake...) and the Forge Bypass Valve on their CX-7? Any comments, or even better, any audio clips?
Trying to remain as quiet as possible, yet still hear the sexy turbo sounds...
AlbanianDude
08-16-2007, 12:10 AM
About to order this... Anybody have the CP-e Intake (Or really any intake...) and the Forge Bypass Valve on their CX-7? Any comments, or even better, any audio clips?
Trying to remain as quiet as possible, yet still hear the sexy turbo sounds...
HKS BOV and K&N CAI with a magnaflow exhaust here is a clip
http://i203.photobucket.com/albums/aa155/AlbanianDude/th_009.jpg (http://s203.photobucket.com/albums/aa155/AlbanianDude/?action=view¤t=009.flv)
http://i203.photobucket.com/albums/aa155/AlbanianDude/MazdaCX7018.jpg
07LiquidCX7
08-16-2007, 08:54 PM
Magnaflow doesn't sound too bad... thanks for posting. Can't hear the BOV though really. Probably just where the mic was.
jb_pdx
08-19-2007, 06:56 PM
Thanks for the clip! The Magnaflow sounds great, it has been added to the list that my wife and bank acct. both hate...
I now have the Forge BPV installed, along w/ the CP-e CAI. It sounds soo sweet! Much cleaner/tighter feeling and sounding than stock. Seems to get up a bit quicker on freeway/passing situations. Well worth the $150...
I am curently running w/ the blue spring in, just as it came from forge. I might try out the yellow spring w/ 1-2 spacers in, just to see how that works out.
If OP or anybody wants pics/audio/video, let me know. I would just post it, but I have not posted that kind of stuff before....
astraelraen
08-24-2007, 09:13 PM
If you could post at least a sound clip of the forge from the drivers seat, window down that would be awesome. I just installed my intake and it definately sounds like the stock valve is leaking boost. I just want to know what the forge sounds like.
CX-7owner
08-26-2007, 12:20 AM
(omg)
CX-7owner
08-26-2007, 01:29 AM
(omg)
jb_pdx
08-26-2007, 01:37 AM
I will get a couple of pics and a sound clip w/ window up and one w/ it down. Should have them posted by tomorrow afternoon.
Still running the blue spring, as I have no way of testing/monitoring boost. I just ordered the DashHawk... After I get that in I will try the yellow spring/shims out and see if it holds peak boost.
Really impressed with this BPV. That stock one is terrible.
CX-7owner
08-26-2007, 01:40 AM
(omg)
astraelraen
08-26-2007, 02:43 PM
With an intake you can hear the sound of the stock valve, its a very slight "pssh." Its more audible if you rev to 4k+ before shifting/letting off the gas.
But to me, it sounds like the stock valve is leaking boost, because you hear alot of high pitched whistling from 3k+.
jb_pdx
08-26-2007, 03:12 PM
Enjoy!
115264
115266
115265
I have a longer audio file with a few different runs (window up/down, 0-60 ect.), but it keeps failing on upload (only 2.48mb .mov, weird)?? I will keep trying...
If anybody wants it emailed, PM me.
CX-7owner
08-26-2007, 03:18 PM
(omg)
astraelraen
08-26-2007, 04:19 PM
With the CP-E are the turbo "sucking" noises really pronounced around 2k rpms? Those are the ones my wife can't stand, especially in around town driving where it seems like unless you always have a lead foot, you're floating right around 2k rpms and thus the noises are very pronounced. I can clearly hear them in that video at the beginning until the engine revs pick up.
She's really bugging me to take off the AEM short intake. I assume the majority of the noises are the sounds coming from the open intake, since the CPE sits down farther in the wheel, I assume they are a little more subdued. I'll probably just have to buy it to see.
I included 2 mp3 files of the AEM intake/stock valve, I had to turn the volume up a good bit to get decent sound from them. I took them with my laptop and its soundcard is pretty crappy. Both are windows up, air off/radio off. One is 3k shifts, the other is roughly 5k shifts. The quality isn't that great and honestly the turbo sucking noise is a good bit louder than it is in the clips. Windows down they are pretty similar except everything is slightly more subdued from the wind noise.
1Sleepy93
08-26-2007, 08:50 PM
Sounds very nice!
jb_pdx
08-26-2007, 10:16 PM
With the CP-E are the turbo "sucking" noises really pronounced around 2k rpms? Those are the ones my wife can't stand, especially in around town driving where it seems like unless you always have a lead foot, you're floating right around 2k rpms and thus the noises are very pronounced. I can clearly hear them in that video at the beginning until the engine revs pick up.
She's really bugging me to take off the AEM short intake. I assume the majority of the noises are the sounds coming from the open intake, since the CPE sits down farther in the wheel, I assume they are a little more subdued. I'll probably just have to buy it to see.
I included 2 mp3 files of the AEM intake/stock valve, I had to turn the volume up a good bit to get decent sound from them. I took them with my laptop and its soundcard is pretty crappy. Both are windows up, air off/radio off. One is 3k shifts, the other is roughly 5k shifts. The quality isn't that great and honestly the turbo sucking noise is a good bit louder than it is in the clips. Windows down they are pretty similar except everything is slightly more subdued from the wind noise.
The CP-e Intake w/ the stock BPV/BOV was a lot of wiiisshhh, phhhisssh and crap like that. Sounded better than bone stock, but my wife hated it as well. The Forge BPV really improved the over all sound. The stock BPV must have really been leaking, cause she (my wife) actually likes the way it sounds now!
Another thing I did to get rid of some of the excess/unwanted nosie from the CP-e intake was to make sure the filter was not touching the splash guard/wheel well cover. You have to play around with the intake pipe and elbow connector to get it just right.
All in all, I feel like the turbo sounds just as it should now... these two products (CP-e Intake and Forge BPV) really go well together.
CX-7owner
08-26-2007, 10:23 PM
(omg)
astraelraen
08-27-2007, 12:00 PM
What are the performance gains like? Thanks for the clips!
With the AEM there is definately a better throttle response. It seems like there is more power throughout the rev range. Also, I think it minimized turbo lag slightly - or at least lets the engine breathe better enough.
Either way, it makes a noticeable difference.
jb_pdx
08-28-2007, 06:31 PM
What are the performance gains like? Thanks for the clips!
You are welcome. Its good to get a chance to contribute for once here!
For which, the Forge BPV or the CP-e Intake?
The Forge BPV does not add max HP or TQ. If the stock BPV leaks, as people on this board have suggested, it should increase acceleration. I am still new to Forced Induction fun, so I really can't explain it well. But for sure, Leaking boost=bad news.
Also, if we ever go crazy and replace the turbo or somehow get more boost from stock (Standback, chip tuning, ect), we can tune the Forge BPV to handle that increase in boost (using the colored springs/inserts).
The CP-e Xcel Intake is dyno proven to add 8+ HP (http://www.cp-e.com/imgs/cx7_dyno_power.jpg) and TQ (http://www.cp-e.com/imgs/cx7_dyno_torque.jpg).
BTW, Those stock dyno #'s seem low to me... Anybody dyno a FWD yet? I will probably get attacked by the searchmonkeys for not searching first, but a 60-70hp loss? Shockingly high.
CX-7owner
08-28-2007, 06:38 PM
(omg)
1Sleepy93
08-28-2007, 10:44 PM
The stock turbo is already over worked. I wouldn't up the boost on it but the standback should help it do it's best and help tune for a larger one.
otnielarencibia
08-29-2007, 09:27 AM
Horsepower at the crank is always more....thats whats advertised. By the time the power goes through the transmission...through the gears and down to the wheels it has lost a lot of power. I forget the percentage loss, but any how, the horsepower on a dyno like the one they use will give you wheel horsepower (whp) which will always be less than at the crank or advertised horsepower, in this case 244 hp.
1Sleepy93
08-29-2007, 12:03 PM
Normal loss through an autotragic is about 20% for FWD/RWD. AWD could be more like 25%.
jb_pdx
08-29-2007, 12:10 PM
Normal loss through an autotragic is about 20% for FWD/RWD. AWD could be more like 25%.
Agreed. Thats why I am saying 28% is horrible. I don't know if CP-e used a FWD or AWD, but I though I read somewhere they were using a FWD. Maybe not... I hope not.
Any FWD dyno's??? Links please, my searches are comming up with a bunch of nothing.
1Sleepy93
08-29-2007, 12:12 PM
I don't think anyone has done a dyno of a FWD yet.
astraelraen
08-29-2007, 07:06 PM
What do the different springs/ adding spacers do? I just got my forge today. It has the yellow spring already installed..
There are no instructions lol. Although its pretty simple... i'd still like to know what the springs do.
CX-7owner
08-29-2007, 07:21 PM
(omg)
offset_98
08-29-2007, 10:18 PM
What do the different springs/ adding spacers do? I just got my forge today. It has the yellow spring already installed..
There are no instructions lol. Although its pretty simple... i'd still like to know what the springs do.
This is interesting because in post number 9, they said they got theirs w/ the blue spring installed...
astraelraen
08-29-2007, 10:31 PM
Well after switching out AEM to the CP-E intake and switching the stock valve with the Forge, here are some thoughts: (disclaimer: I only did some city driving, ~ 30 minutes worth, no high speed revs, maybe 4k max)
I didn't see any noticeable differences in terms of power, but I wasn't really looking for it - just casually driving.
The stock valve leaks boost like crazy, which I would think would lead to a power gain, but I dunno. With the Forge it got rid of a ton of wsssh and psssh all through the rev range.
The Forge sounds cool. It does make a noticeable pssh sound, alot more than the stock valve. I don't see any need to buy a HKS or Turbosmart valve, but I'm no expert in terms of the difference between these valves, especially if you are doing extensive mods.
The CP-E intake is pretty easy to install, it does take roughly 1-1.5 hours.
AEM vs CP-e: no noticeable difference in power. The AEM is a good bit louder though, especially if you hover around 2-3k, you'll get a lot of turbo sucking sounds.
For the Forge, the springs are progressively stiffer. Red the stiffest and blue the softest, with yellow in the middle. I'm no turbo expert so I don't really know what the difference in stiffness means.
I'm waiting on the intercooler, its on backorder.
astraelraen
08-29-2007, 10:36 PM
How long did it take to get to you? And I would like to hear your thoughts as well on the quality, noticeable improvements etc.. It would all be greatly appreciated! Gosh I just can't wait any longer.
I will be selling my AEM intake if you want to buy one thats been used about a month. I need to repackage it and take pictures and all that stuff to put it up here. I'll do that tomorrow or Friday. If you are thinking about buying one new, I bought mine from pracing.com - it took like a week though because they were on backorder... but I have a suspicion they don't carry much in stock and simply order it whenever you place an order.
CX-7owner
08-29-2007, 10:49 PM
Yes I would much rather buy from someone that already has it, but it would have to be COD or something other than paypal.
jb_pdx
08-29-2007, 11:31 PM
For the Forge, the springs are progressively stiffer. Red the stiffest and blue the softest, with yellow in the middle. I'm no turbo expert so I don't really know what the difference in stiffness means.
Just so nobody is further confused by this, the stiffness order (http://www.forgemotorsport.com/media/Valve%20tuning%20kit.pdf)is:
Red - Stiffest spring
Blue
Yellow - Weakest spring
Forge also has a Green spring that is even weaker than the yellow, but we boost too much for it to be of any use to us....
If you want more info, Forge has an ok website at www.forgemotorsport.com and they respond quickly to email inquiries.
astraelraen
08-29-2007, 11:41 PM
Wow I compared all the springs by pushing them in the housing and I swore the yellow was stiffer than the blue. I'll check the forge website out.
edit: sweet pdf file. thanks a bunch. I think I need the blue spring, the yellow does seem to be "dumping boost" as they call it too easily. If you barely let off the gas it pssssssh's like crazy. But, I don't really know anything about turbo chargers and how they work, it just seems/sounds that way to me :)
I put in the blue with 1 spacer on top of the spring (do you put them on top of the spring or on the bottom? lol)... just from compressing the springs manually the blue and yellow feel REALLY similar, while the red is definately way stiffer than the other two. Gonna test if it drives any different tomorrow.
jb_pdx
08-30-2007, 02:36 PM
I think the spacers should go underneath the spring, its less likely that you would lose it the next time you change it around. I must have switched the yellow for the blue, then spacers, ect 10 times before I decided the blue w/ no spacers it the best (The way mine came from Forge... lol).... But it shouldn't really matter what side you put it on, they are just to compact the spring and make it stiffer.
Funny that yours came stock w/ the yellow... I even emailed Forge after receiving mine asking them witch spring for the CX-7, they said blue OR maybe yellow(?), which ever was the weakest that held max boost.
Hopefully I will get the DaskHawk today and sometime over the long weekend I can play with it to find out which setup works best. I think I will be able to tell by the peak boost (amount or if it maintains that amount for say a passing situation on highway), but I might be wrong. I am, like you, still learning the way the turbo setup works.
astraelraen
08-30-2007, 04:43 PM
From the Forge website:
Valve Spring color coding
Green - 5-15 PSI
Yellow - 15-23 PSI
Blue - 23-30 PSI
Red - 30 + PSI
The above figures are estimates only and should only be considered as a guideline
otnielarencibia
08-30-2007, 04:45 PM
So the green should be fine for stock.... And yellow if anyone puts the boost higher.
CX-7owner
08-30-2007, 05:16 PM
(omg)
astraelraen
08-31-2007, 10:17 AM
I put in the yellow spring + a spacer last night and it sounded like poo this morning on the way to work. I can't describe the noise, it was a hybrid pssh + something else.
Really though, I've tried yellow, blue, blue + spacer and yellow + spacer and the performance difference is negligible. To me there is a slightly different sound though.
Blue or Yellow, no spacers is probably a safe bet.
jb_pdx
09-01-2007, 12:46 AM
I put in the yellow spring + a spacer last night and it sounded like poo this morning on the way to work. I can't describe the noise, it was a hybrid pssh + something else.
Really though, I've tried yellow, blue, blue + spacer and yellow + spacer and the performance difference is negligible. To me there is a slightly different sound though.
Blue or Yellow, no spacers is probably a safe bet.
100% Agree
offset_98
09-08-2007, 01:48 PM
Does anyone have this in their car that is otherwise totally stock? I'm curious to know how it feels with nothing but the FMBV.
CX-7owner
09-08-2007, 05:37 PM
It would most likely improve response and hold boost where ever its leaking, but It would be held back by the restrictive Airbox, probably won't be able to hear it either.
CX-7owner
09-11-2007, 05:01 AM
(omg)
CX-7owner
09-11-2007, 09:29 PM
(omg)
Spoolinup
09-12-2007, 06:49 PM
DOH! I don't want to hear that, cuz now I REALLLLLY want one, but can't afford it right now.....
offset_98
09-12-2007, 09:49 PM
Makes me wonder if I should sneak one into my wife's CX-7...any different sounds/noises?
CX-7owner
09-13-2007, 12:40 AM
If you have the stock airbox, the noises probably won't be noticeable, but it does have a distinct sound to it.
EDIT: After looking around, you will be able to hear the new BPV, I don't know how audible it will be.
offset_98
09-17-2007, 11:39 PM
After driving a 2008 Dodge Ram Cummins Turbo 1000 miles this weekend (car from work while my company car gets a new non-leaking fuel tank) I know now that she'll never notice it since she only noticed the turbo in the truck when I pointed it out to her. Even after that she didn't really care, just wanted to listen to the radio. I think I'm in :)
CX-7owner
09-18-2007, 12:54 AM
(omg)
firedawgs
10-04-2007, 06:24 PM
Where do you buy (best price) for the Forge BPV?
CX-7owner
10-04-2007, 06:35 PM
(omg)
firedawgs
10-04-2007, 06:42 PM
I have a black one a can let go for 130 dollars!
If it is new and have the springs and it is a BPV shipped. Then I'll take it.
2URBO6
10-04-2007, 07:04 PM
I didn't realize what a difference the forge had until I took it off. I thought I put the stock on wrong or something there was so much difference. Its on right and forge gives you great performance for the price and if you don't like the sound, it is easy to learn how to stay off the boost and save gas mileage while you're at it :)
hectik1
10-04-2007, 10:24 PM
Looks like I will be buying this soon.(spin)
offset_98
10-06-2007, 10:52 AM
Shit...I've got to get one but we just had to replace our fridge this weekend :(
Gray Ghost
10-14-2007, 02:19 PM
How long did it take to get to you? And I would like to hear your thoughts as well on the quality, noticeable improvements etc.. It would all be greatly appreciated! Gosh I just can't wait any longer.
I ordered one on Friday and I got an email saying it shipped out the same day. I should have it on Monday.
CX-7owner
10-14-2007, 02:42 PM
(omg)
AzMz3
10-19-2007, 09:27 PM
I just ordered the Forge BPV for the CX-7.
After installing the CP-E CAI there are some sounds that seem like boost is being bleed off.....similar to when I had a leaky Greddy RS BOV. Hopefully the sound and performance will improve as others have stated. If not I have the MS3 to put it on and play with.
CX-7owner
10-19-2007, 09:32 PM
(omg)
hectik1
10-22-2007, 10:03 PM
Just bought the Forge....Love the Forge products on my Evo (BPV and MBC)(spin)
SuperStretch18
10-23-2007, 09:04 AM
Couple questions?? First would The Forge BPV being installed affect your warranty at all?(will the dealer bust your balls if they see it?) Secondly where is the cheapest place to pick one up? I saw a tuner shop on ebay selling them for 158.00 shipped.
If a dealer wants to bust your balls about a BPV, you need to find another dealer. Honestly, they would need to prove that the BPV caused the issue before denying coverage; which is unlikely, but possible.
Regarding where to buy; the best place is protege garage www.mazda3online.com. Price is about the same and you are supporting a truly great vendor.
07LiquidCX7
10-23-2007, 05:29 PM
What's the difference between the FMS blow off valves and the FMS bypass valves that they (above sponsor) offer? Which is better for our cars? I only plan on doing CAI and TMIC in the future... does that make a difference in the selection? (shrug)
CX-7owner
10-23-2007, 05:30 PM
(omg)
CX-7owner
10-25-2007, 09:44 AM
(omg)
CX-7owner
10-25-2007, 01:41 PM
Intake for sure, I have the BPV+short ram intake and I love it, you might want to go with the CAI, but any intake is great, just be sure to reset the ECU after all mods.
CX-7owner
10-26-2007, 11:30 AM
(omg)
CX-7owner
10-26-2007, 09:09 PM
(omg)
hectik1
10-27-2007, 01:21 AM
First off I ordered the BPV from Forge directly.....ordered on the 22nd, shipped the 23rd, and I received it the 26th. Only cost $180....$170 plus $10 shipping. Great deal indeed!
Install literally took less than 5 minutes, the the tools needed was a 10mm socket, flat screwdriver, and a pair of pliers.
Driving impression: What a difference! What everyone was saying about response was true. Night and day difference between stock and the Forge. The acceleration is definitely more aggressive than stock. Sound is just what I wanted (like my Evos Forge). This is one of my favorite mods so far. Well worth the money.
I will post a pic tomorrow!
AzMz3
10-27-2007, 02:29 AM
I installed the Forge BPV today. I got it for $165 shipped.
I haven't been driving the CX-7 that much lately so decided to do a test. I install the Forge and took it out for a test drive and then put the stock bpv on and did the same test drive.
I didn't notice anything different after installing the Forge bpv, atleast not what many have stated on here. It came with the yellow spring install and I ran that and did a little run with the blue. Yellow seemed to be better IMO, blue would give you a little flutter at low boost.
After putting the stock bpv on and going out on the same test drive it then showed that there was a good difference between the two.
The Forge is alot louder and there was no noticable drop in power after shift change like the stock bpv. Even from a stop there was more response with the forge over the stocker.
So tomorrow the Forge goes back on. Got to see if the wife likes it, if not it will go on the MS3.
CX-7owner
10-27-2007, 03:22 AM
(omg)
warrusty
11-02-2007, 08:10 PM
How much of a sound difference between the Forge and stock, assuming stock air intake? I have a 2006 GLI with an intake and Forge and it sounds GREAT for a sports sedan, but I'm not looking for a noticeable sound difference for the CX-7 (wife's car).
CX-7owner
11-02-2007, 08:12 PM
(omg)
CX-7owner
11-07-2007, 03:31 PM
(omg)
mariusz
11-07-2007, 05:47 PM
i got my Forge BOV yesterday. i made a sigificant difference in power. and i havent reset the ECU after this mod yet (Idid it on couple acasions in the past) also i have Boost/Vac dade and i can see the boost is much more constsnt hwen accleratinting, And yes i strmgly belive that the stock BOV was leaking badly.
i did put a Blue sping i havaent tired any others yet. but i do have high flow cat and haigh fow K&M air filter
CX-7owner
11-07-2007, 06:33 PM
(omg)
mariusz
11-07-2007, 07:52 PM
i will !!
and sorry for my spelling i just realised that i did few mistakes
AzMz3
11-07-2007, 10:49 PM
I'm running the blue spring now. I finally got a good day to test it out and there is no fluttering or compressor surge with it. It actually pulls pretty good in the mid range now.
If I get some more time I might try a shim and play around with it.
mariusz
11-08-2007, 05:43 PM
i did change to yelow spring. performance wise i don't belive that there is much difference. it seems to hold the boost upt 10 psi as did the blue one, (note i did not have time to test it at higher boosts, which require dreving up a hill at high speeds)
there are 2 differences:
1. the sound BOV makes when it ventilate is of lower pitch and longer, which would make me think that it opens more and allows more air baack into
circulation=less strain on turbo, I belive, could be wrong.
2. it oens after at lower boosts, what i mean is if i only boost to 0-1 PSI and let go the gas pedal, where in blue noe had to boost to pressures over ~5 PSI and than let go the pedal before valve opened. which again in my mind yellow sping (softer on)puts a less stain back on the compressor (turbo) which is a good thing.
so for now i will keep the yellow in.
mariusz
11-15-2007, 05:15 PM
just to update you , re springs in the BOV. it appears that yellow will leak boost at 14 PSI, where blue one can hold it up to 16PSI. as yet i haven't tried red one.
also i don't belive that the aluminium specers maake any noticable difference on the bost/vac gage.
mariusz
11-25-2007, 05:58 PM
just to update :
1. red spring is shit. way too hard. it make compresed air to go back thorugh turbo.
2. i'm staying with blue oneas almost as good at the low boost and hold to 16psi wnhen yellow will not (~14psi)
VirginMazdaOwne
11-25-2007, 07:39 PM
Well thought I would throw mine into the pile
Running CPE CAI and the Forge BPV
http://www.youtube.com/watch?v=Uv5iv51ktPI
I feel the car pulls much better but its taking some time to get use to hearing the turbo you can't hear it so well in the video the first part is windows down then windows up.
As a poster stated above its really pronounced at lower rpms I can hear it through the CAI as long as its not hurting anything its staying on :)
oh ya running the yellow spring no spacers, I had to go find my own O ring because it didn't come with it... I ordered from Street Unit and I'm going to ask them to send me a new one also the top O ring was a little mangeled...
mariusz
12-02-2007, 06:00 PM
just note yellow spring will leak boost at 14 psi, blue will not
VirginMazdaOwne
12-03-2007, 06:43 PM
Ok stupid question how do you know when you are at 14 PSI? or any PSI?
VirginMazdaOwne
12-05-2007, 06:45 PM
Ok so here is another stupid question is boost psi relative to rpm?
Would you see a drop in rpm before letting off?
06Si to CX-7
12-11-2007, 07:38 PM
Is this an easy mod to do yourself? Just disconnect stock BP and replace with the Forge BP? Is it completely necessary to reset the ECU if this is the only mod you have? Thanks!
CX-7owner
12-12-2007, 12:47 AM
(omg)
06Si to CX-7
12-12-2007, 11:31 PM
Yeah it's that easy, you don't have to reset the ECU but it's recommended.
Sounds good, think I'll get this before the CAI...I've seen mixed reviews on here whether or not a CAI will do any good on a turbo motor. This is my first turbo so I'm not really sure. Really don't want to spend over $200 for a CAI if it's only going to make my 7 sound sportier. The BP valve seems to be a no-brainer though since the stock valve leaks boost. Do you think Mazda will make this a TSB one day, it shouldn't be leaking afterall (confused)
astraelraen
12-13-2007, 09:55 AM
If you take the resonator and baffle out/off of the stock airbox you will be able to hear a little more of the turbo sounds. Its not as loud as the CPE or any other intake, but with the radio low(er) you can hear the forge + some wooosh.
CX-7owner
12-15-2007, 08:32 AM
(omg)
06Si to CX-7
12-18-2007, 11:31 AM
Maybe they designed it that way, to smoothen things out, but I doubt they will release a TSB to replace the BPV on all cars sold with the DISI engine.
The CAI will definitly improve things all around, just over a SRI they're won't be any major gains because the all the air is running through that hot Turbo before it even hits the engine/gets intercooled. The only reason to buy a CAI over the SRI on a turbocharged engine would be for the more subdued turbo music.
Thanks for the input guys, I think that I'll hold off on the intake for now although I would really like a sportier sounding CX-7! I have noticed improved intake sound already with just a K&N filter actually. I'll likely get the BPV after Christmas.
astraelraen
12-18-2007, 08:05 PM
If you take off the resonator in the wheel well and the baffle inside the stock airbox you will hear more sounds. Its not nearly as loud as an intake, but you can definately hear it if the music is medium-low.
dirtyhat
12-27-2007, 05:37 PM
Has anyone noticed a significant increase in gas consumption with the Forge Motorsports Blow off valve and the CAI? I am only seeing about 270 miles to the tank before the gas light comes on. Before the mod, I was close to 325 before the light.
CycleX-7
12-27-2007, 09:31 PM
Is their a chance your driving habits have changed since the modifications? I know I'd be more inclined to "test" the new power-adders and listen to the newly audible motor.
Just my thoughts. I plan on doing both these additions very soon, so I hope it's simply a matter of skinny pedal control.
SC
CX-7owner
01-03-2008, 03:02 AM
(omg)
dirtyhat
01-08-2008, 10:57 PM
I am on a fresh tank and experimenting with the MPG and the BOV. This tank is taking it REAL easy, I would hope to get the 325 or so that I was seeing before with this driving style. I will keep the results posted.
07LiquidCX7
01-09-2008, 12:05 AM
Is their a chance your driving habits have changed since the modifications? I know I'd be more inclined to "test" the new power-adders and listen to the newly audible motor.
Just my thoughts. I plan on doing both these additions very soon, so I hope it's simply a matter of skinny pedal control.
SC
Me too... I'm getting around 325 to the tank at half way between empty and 1/4 tank. I would like to get better than that with the mods if possible. I usually baby the car... but since the last reflash I've had so much fun driving it I only got 280 to half mark between empty and 1/4. LOL imagine if I do those mods... I'll be down to 250! LOL... don't care, doing them anyway. (headbang)
dirtyhat
01-16-2008, 12:33 PM
I had been babying the car for the past tank to see if my driving style was what caused the MPT(Tank) to reduce from the normal 325 to 276. This past tank consisted only two light-to-light races and the rest was done under 3K RPMs. My driving was around 75% city. The end result was 338 miles on the car before the gas light kicked on.
Happy gas burning.
sta44
02-29-2008, 04:16 AM
Yeah it's that easy, you don't have to reset the ECU but it's recommended.
How can i reset the ECU?
SuperStretch18
02-29-2008, 02:19 PM
Unplug the negative terminal on your battery and press the brake a few times to get rid of any charge still in the system.
sta44
02-29-2008, 11:20 PM
Unplug the negative terminal on your battery and press the brake a few times to get rid of any charge still in the system.
Sorry, one stupid ques. do it when the engine is on or ......??
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