justanothermp5
Banned
- :
- Rust Bucket
obviously seeing as how i was asking a question about it
but thanks for the explanation
Supercharged MP3 Build
- Thread starter MP3Performance
- Start date
obviously seeing as how i was asking a question about it
but thanks for the explanation
MP3Performance
Member
- :
- Mazda MP3
Actually the bov did sound like a vacuum, lol. I just thought it was not opening enough since I looked into it and the valve seemed to only be partially open(pretty small amount). I guess it makes sense since the distance the spring opens is function of the amount of force placed on it, and that the small opening makes the air whistle while going through it since the opening is pretty small. The other thing is that the idle seemed off, but I can attribute that to the ecu trying to "learn" since the car battery was disconnected for so long. The only thing I can't figure out completely is why it is running so rich at idle (10-11AFR), while in NA mode it can idle at (14-16AFR). My only guess is that some of the air is causing turbulence around the MAF, making the MAF think that there is actually air going through it even though the TB is closed.
I see that you are running megasquirt now, but did you run it using the MAF anytime before, and if so what were your results at idle?
Edit: when I took the valve apart it seemed to be ok and unused, and the rubber diaphram had no visible rips in it as well.
Last edited:
bedwards6954
Member
- :
- Mazda, RX-8
when I first did my setup I had nothing but a RRAFPR I was so eager to do a test run, mind you this was with the original, so my MAF bolted to that plate. this made it so the MAF was not directly in the airflows path.
anyways it idled fine, and surprised me when I drove it, after that I hooked up MS but the Idle never seemed to change from when the supercharger was on or off. I would keep adjusting the bov so it will seal, but the loud blowing noise is normal
the ssafc thing that intercepts the MAF readings and alters them correct? try going back to stock, then try to idle and see if you get the same results. the setup is only 4.5psi watch your AFRS and you should be fine
currently my car is a daily driver mostly back to stock, No MS, I plan to install the SuperCharger and try with just the RRAFPR
(Rising Rate Adjustable Fuel Pressure Regulator)
hope to see some pictures with your next post!!
anyways it idled fine, and surprised me when I drove it, after that I hooked up MS but the Idle never seemed to change from when the supercharger was on or off. I would keep adjusting the bov so it will seal, but the loud blowing noise is normal
the ssafc thing that intercepts the MAF readings and alters them correct? try going back to stock, then try to idle and see if you get the same results. the setup is only 4.5psi watch your AFRS and you should be fine
currently my car is a daily driver mostly back to stock, No MS, I plan to install the SuperCharger and try with just the RRAFPR
(Rising Rate Adjustable Fuel Pressure Regulator)
hope to see some pictures with your next post!!
Last edited:
- :
- 2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P
subbin'
MP3Performance
Member
- :
- Mazda MP3
Finally figured out the problem with the rich idle! The problem was that the bov was too close to the maf. I switched the pipe locations, making the bov right above the sc, and now it idles perfect. I am guessing it was rich since not enough air was leaving the bov or causing excessive air turbulance and kept circling between the maf and tb causing it to read much more air then it actually was taking in. I only worked on it for about an hour so nothing else got done, but I did take a short video.
Things to keep in mind:
-The car is in NA first, once you hear the "vacuum cleaner sound" that is when the SC is on.
-I only revved it to about 3k-3.5k or so.
-Recorded on a crappy kodak picture camera (quality is pretty bad)
-Yes some wires and hoses are showing, this is still a work in progress.
-Yes the engine bay is very dirty, it will be cleaned
.
<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/RYmMyIqj4fQ&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/RYmMyIqj4fQ&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
I am planning to drive the car around next week and start tunning it. This weekend I hope to clean everything up and put the remaining stuff back together.
Things to keep in mind:
-The car is in NA first, once you hear the "vacuum cleaner sound" that is when the SC is on.
-I only revved it to about 3k-3.5k or so.
-Recorded on a crappy kodak picture camera (quality is pretty bad)
-Yes some wires and hoses are showing, this is still a work in progress.
-Yes the engine bay is very dirty, it will be cleaned
.<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/RYmMyIqj4fQ&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/RYmMyIqj4fQ&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
I am planning to drive the car around next week and start tunning it. This weekend I hope to clean everything up and put the remaining stuff back together.
bedwards6954
Member
- :
- Mazda, RX-8
looks good and sounds similar to mine 
MP3Performance
Member
- :
- Mazda MP3
MP3Performance
Member
- :
- Mazda MP3
I wasn't really sure what to expect at first, but I am very happy with the outcome now. The low end torque is amazing. Actually it might be a little too much down low
. I can only go up to about 2000rpm in first gear before I have to shift because after that it will just snap to 5000 in a blink. From the data logs I see that it doesn't matter what gear or speed I am in to get boost. All I have to do is push the throttle in a bit (which closes the bov) and BAM!!! 5 psi, even at 1300rpm or so. It actually feels more like a v8 or so because you don't have to rev the engine out to make power, just tap the throttle and away you go. The midrange and high rpm has also improved a lot, its hard to explain but it feels more "full" and isn't gasping for more air as it would in NA.The tune is pretty good, but there is still room for improvement. It was my first time tuning this type of stuff, but as you can see the AFR are around 11-13 which I want. There are still some spots where it goes to 10 at partial throttle as well as increasing ratios at the higher rpm, so that will be addressed soon. The ssafc is actually pretty easy to tune and after about 5hrs of driving and remapping I think I got the hang of it. Just for reference, without any tune the car was running 15 and higher on the stock settings (confused).
I will be getting better video and more pics in the next couple days. That video was just to show that the car is up and running. My cousin and I were tuning the ssafc and just decided to take a quick clip.
js_protege_03dx
Member
- :
- 2003 mazda protege dx
****** amazing!!!
- :
- 2002 22A P5 and 2007 TR MS3
Good work....Hope it runs reliably forever and ever...
- :
- '13 CWP MS3 & '16 Mazda6 GT
amazing work congrats!
We need some drive by vids so we can hear it from outside the car lol
congrats!We need some drive by vids so we can hear it from outside the car lol
MP3Performance
Member
- :
- Mazda MP3
exedy stage 1 (msp version) with a fidanza flywheel and ss clutch line.
Also, here are some pics of the modification I had to make to the intake side of the adapter peice. That corner piece was hitting the lower radiator hose so I had to "adjust" it to make it work.
Attachments
Last edited:
bedwards6954
Member
- :
- Mazda, RX-8
Great Job I hope you enjoy it!!!
