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 Old 08-07-2017, 02:31 PM   #1
 
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Default CX-7 modding and forum noob

I'm new to posting on mazdaspeed forum but I have always read through the posts since I bought a CX-7 for my wife and my mazda 6 back in 2007. I'm impressed with all the knowledge everyone (most everyone)on the forum. You guy have inspired me to do some updating of the CX-7 when the turbo blew. I had to get a new car as a daily, so i figured what the hell lets learn and have so fun with the mazdaspeed 3/6 big bro. Well it has been a trip for sure, but now im calling out for some help. First some background on what I've done....
Removed head ported (small amount) and polished runners and also combustion chambers.
Cleaned valves adjusted valve/tappet clearences
Replaced timing chain and VVT of course almost everything is new or inspected to do with
installed two OCCs one on valve cover and one for PCV
changed/upgraded?? to KO4/882 turbo
Installed a custom water to air intercooler
Installed a SSQV (ebay knockoff) reculating BOV
And a few other changes....but here where you're brilliant minds come in..
The "Speed 7" runs ok but there is something happening when I accelerate hard. It will start to studder and back fire when boost gets above 15 psi. I also get a BOV flutter when boosting for a longer period of time and gradually increase boost (I know ebay knock off) but not sure about. I'm seeing some weird timing advance changes and not sure what it should be doing. I dont have a tuner or anything like that but i do have and obd2 reader do i have some type on monitor to see some of what is going on.
I did get a little over my head on this build with out a tuner or the money to do it all "right"
Not 100% sire it timed right but it idles at about 10* which is what I read here on another post it should be
Please help if you got suggestion where i can look from here. I attached a screenshot of the timing advance and other data.
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