Striker187
Member
- :
- 2008 MS3 GT
i think the stock airbox is definitely covering the sound up. i remember hearing it when i had the stock airbox.
MSP Turkey: FACTS
- Thread starter SoniCraze
- Start date
K
Keith@FP
Remember that it basically is an aftermarket turbo setup. Mazda did not do the engineering. Coincidentally, they did pull a similar Miata project back in-house and engineered the MS Miata themselves...
Keith
Keith
Alright, now I am really confused.
I did the vacuum lines first, and didn't notice any change at all, except that the valve seemed more responsive.
Then I switched the valve to run open vent, and it sounds bitchin now with a nice blast of air, but it still has the turkey sound.
The sound is most definitely coming out of the air filter, and it actually does it more on low boost throttle lifts while not pushing in the clutch. I would think that this is the sound of the smaller valve fluttering if it weren't for the fact that the sound is coming from the air filter and not the valve itself.
To further my confusion, the car is not trying to stall anymore than it was when I was recirculating it. It would try to stall when dropping from above 3000rpm before, and that has not changed at all.
What in the world is going on here?
I did the vacuum lines first, and didn't notice any change at all, except that the valve seemed more responsive.
Then I switched the valve to run open vent, and it sounds bitchin now with a nice blast of air, but it still has the turkey sound.
The sound is most definitely coming out of the air filter, and it actually does it more on low boost throttle lifts while not pushing in the clutch. I would think that this is the sound of the smaller valve fluttering if it weren't for the fact that the sound is coming from the air filter and not the valve itself.
To further my confusion, the car is not trying to stall anymore than it was when I was recirculating it. It would try to stall when dropping from above 3000rpm before, and that has not changed at all.
What in the world is going on here?
Last edited:
DooMer_MP3
Member
Keith@FP said:
True, but Mazda tends to "fix" things after the company they commission is done with the prototype.
Example 1: Racing Beat and the MP3/MSP swaybar design, "fixed" by Mazda so that the bushings fail every 2,000+ miles and causes a horrible clunk noise and degraded handling.
Example 2: Callaway's MSP turbo kit with nice hard-pipes and tuning, "fixed" by Mazda to allow for plastic pipes which crack easily, and the infamous hesitation that is still not completely fixed.
With this track record, I'd suspect Mazda is partly or fully responsible for the Turkey, aka damaging compressor stall.
Chris
K
Keith@FP
Mazda had to use plastic pipes for the MSP, otherwise the car would have had to undergo crash testing again. That would have been too expensive and the car never would have hit market. The hesitation is due to poor engine management setup, and I'm not sure you could really point the finger at Mazda for that one. It takes 5 engineers two years - full time - to calibrate an OEM engine management system for production. I'm sure the MSP did not get that attention from anyone. Callaway certainly does not have the capability.
Keith
Keith
Little Beavis
Member
- :
- 2001 MP3-T (#911)
Compressor surge sucks, but that is what it is. . .you need to get that thing screaming.
http://www.mazdamp3.com/vbb225/showthread.php?s=&threadid=32189&highlight=sound+of+music
That is a thread of clips of my car. I found that I had the turkey until I loosened the BOV WAY, WAY up and then gave it a signal straight off the manifold and nothing else. I know the Greddy Type S is sensitive to the vacuum input. I don't have a MSP, but a MP3 w/ turbo. . .and in the end, they're all the same.
505, your car sounds good (exhaust), but that is definitely compressor surge.
http://www.mazdamp3.com/vbb225/showthread.php?s=&threadid=32189&highlight=sound+of+music
That is a thread of clips of my car. I found that I had the turkey until I loosened the BOV WAY, WAY up and then gave it a signal straight off the manifold and nothing else. I know the Greddy Type S is sensitive to the vacuum input. I don't have a MSP, but a MP3 w/ turbo. . .and in the end, they're all the same.
505, your car sounds good (exhaust), but that is definitely compressor surge.
K
Keith@FP
SoniCraze, you don't understand. The BOV is designed to avoid the turkey, aka compressor surge. If it's not doing its job, taking it out will make no difference at all. Of course removing it won't affect the compressor surge - you've just removed the exact thing that's designed to prevent it.
Instead, you should be looking at making the BOV work properly.
Keith
Instead, you should be looking at making the BOV work properly.
Keith
K
Keith@FP
An insufficient signal line will also prevent a BOV from working properly. Simply putting on a big shiny valve doesn't mean it works 
Keith
Keith
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