slash128's Top Mount Build
03-12-2014, 03:43 PM
#451
n3rd
Thread Starter
I don't get that happen at all . But one time i was on the motorway sitting at around 5500rpm lightly on and off the throttle (ready to floor it 
) when all of a sudden i got a massive backfire . I mean the whole car shook ! I was expecting to find my muffler in pieces but it somehow survived.
I think what you are describing would be a PIA . How far past the maf does your BOV recirc tube enter the intake?
) when all of a sudden i got a massive backfire . I mean the whole car shook ! I was expecting to find my muffler in pieces but it somehow survived.I think what you are describing would be a PIA . How far past the maf does your BOV recirc tube enter the intake?
03-12-2014, 03:44 PM
#452
n3rd
Thread Starter
03-12-2014, 03:48 PM
#453
n3rd
Thread Starter
Not turbo related but next issue to deal with are my freaking AKE keys. I am down to one reliable key. Mazda wants over $400 for a replacement and programming! I wish I could just yank the AKE system out and have a normal key 
03-12-2014, 03:52 PM
#454
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slash, i believe it is the tune if it's like that. it happens to me alot, but i use interceptor, so EMS might make it a different scenario..
what i think happens is that when you are in boost, the computer adds fuel according to the air entering the engine (the vacuum level is getting higher and AFR is richer), then all of sudden you let go the throtle, which it closes the incoming air into the engine (lower vacuum probably -25 to -30) AFR lean, but some fuel still get left behind, plus the heat of the exhaust, it creates pop sounds..or sometimes from pop to the fire..i might explain it wrong,lol..
it is cool i think, nothing will do bad to the car..
steven
what i think happens is that when you are in boost, the computer adds fuel according to the air entering the engine (the vacuum level is getting higher and AFR is richer), then all of sudden you let go the throtle, which it closes the incoming air into the engine (lower vacuum probably -25 to -30) AFR lean, but some fuel still get left behind, plus the heat of the exhaust, it creates pop sounds..or sometimes from pop to the fire..i might explain it wrong,lol..
it is cool i think, nothing will do bad to the car..
steven
03-12-2014, 03:53 PM
#455
I think its the BOV location,
the BOV opens the turbo pressure and pre intercooler pressure is gone, but the post intercooler pressure is still high so that last bit either goes backwards to vent the bov or charges past the throttle plate, creating a small burn that keeps the turbo spinning enough for the maf to read its getting more air, and injects more fuel then what gets past the throttle plate. all this happening in a split second.
that's my reasoning at least
the BOV opens the turbo pressure and pre intercooler pressure is gone, but the post intercooler pressure is still high so that last bit either goes backwards to vent the bov or charges past the throttle plate, creating a small burn that keeps the turbo spinning enough for the maf to read its getting more air, and injects more fuel then what gets past the throttle plate. all this happening in a split second.
that's my reasoning at least
03-12-2014, 03:53 PM
#456
Yeah .... it sounds like an idiosyncrasy of that layout . Something to do with the air having to change direction perhaps 
You might be able to lessen it by taking fuel out in the load areas below 40% in the higher rpm range.
You might be able to lessen it by taking fuel out in the load areas below 40% in the higher rpm range.
Last edited by Brettus; 03-12-2014 at 03:56 PM.
03-12-2014, 04:15 PM
#457
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steven
03-12-2014, 05:04 PM
#459
I hear you slash....I just use my metal key. I really need to get a new set but like you just mentioned, EXPENSIVE! I just keep buying car parts and putting it off.
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Posted From RX8Club.com Android App
03-12-2014, 10:26 PM
#461
n3rd
Thread Starter
No worries, thanks for the suggestions! Even just getting just the key alone is $79 plus programming. The key itself has a chip in it. I had a key made and it turns the tumbler but won't actually start the car argh. I figured if I'm gonna go deep I might as well go all in 
If there was an affordable way to rip out the whole advanced keyless/immobilized system I would do it and have regular keys with an alarm.
If there was an affordable way to rip out the whole advanced keyless/immobilized system I would do it and have regular keys with an alarm.
03-12-2014, 11:06 PM
#462
I've pretty much decide to get it done at the end of the month. My biggest problem is having to drive well over an hour to the nearest Mazda dealer 
Good luck with yours slash
Good luck with yours slash
03-13-2014, 12:15 PM
#464
n3rd
Thread Starter
Ya I was thinking about that. I found some diagrams and the AKE system is pretty tightly integrated. It definitely looks possible, but could be a substantial level of effort. I will probably dig deeper into it.
03-13-2014, 01:51 PM
#469
n3rd
Thread Starter
Exactly. I have been looking at the diagrams and that's why in my previous posts I said I wished there was an "affordable" way and that it would probably take "substantial effort" I will probably just get a key short term, but I like to tinker, so I still plan on noodling on it.
I will probably just get a key short term, but I like to tinker, so I still plan on noodling on it.
04-09-2014, 12:20 AM
#475
n3rd
Thread Starter