If the MAF sensor is before the turbo you will get some black smoke during shifts due to metered air that doesn't actually make it into the engine. MazdaManiac has used his BOV both ways so maybe he can give you the detailed input you might be seeking.

 

i never noticed any black smoke (then again i dont drive behind myself) lol. i never knew that about the black smoke!

but i do notice that it goes rich if you let off the throttle qucikly which results in a mild backfire noise (or extreme gunshot noise, depends what exhaust/midpipe combo you have)

 

^^^ Yep that.

The black smoke is unburnt fuel.....


PS - You're ricers!!!!! LOLZ

 

Well my car already backfires like crazy, and ranges from dull thumps or popping to earsplitting cacophonous gunshots. My favorite type of backfire is the triple or quadruple BOOMBOOMBOOM when I throttle off sometimes or the dull THUUUUMP followed by a gigantic fireball that lights up my mirrors. Did I mention my tune is still ridiculously rich?

Isn't the MAF always on the intake pipe feeding into the turbo? I can see how that would make it run rich when I throttle off if it metered air its not actually getting so it throws in "excess" fuel.

 

Don't tell anyone!

 

I don't have to.... you already are....HAHAHA

 

Vroom PSSssssss BANG.

 

Lmao I'm with you. My wife always says something when the gunshot backfires go off. I tell her "Those arent even the good ones!" My favorites are the slow solid "Phoooomp!" I love seeing the bright flash reflected in the windshields/headlights of the cars behind me followed by them hitting their brakes!

 

Well you can take me off the official O.B.O.L's club roster for now, I'm breaking in my new motor after I blew the seals out of the last one.

Fun while it lasted, and addictive for sure!

Will returbo in the spring, and maybe let someone else tune it this time.....

S

 

That sucks dude!

 

Ugh, sorry to hear your blew your motor Stealth, but glad you have a new one. Just don't give up on FI!

 

Speaking of gunshots and flames, has anyone ever had a cop behind them when it happens at night.

 

I've had them on the same road when I've had serious backfires, but never fireballs with a cop nearby and never with a cop right behind me. I drive VERY conservatively with cops around. No point in giving them reasons to pull me over.

Back on the subject of BOVs... which different BOV's have people tried? I've been listening to a bunch of them on Youtube, but its somewhat hard to tell. Where is mysql when you need him? He's owned them all from what I can tell heh.

 

^ Looking for the best sounding one, I've had a HKS SSQV on my 350 a couple years ago and it sounded nice.

Edit: Also had a Tial bov but was loud

 

 

who tuned it?

 

haha the gunshots are controllable by me about 95% of the time, they only happen when i want them to happen. although there are some random ones sometimes lol...for the most part, i make it pop when i want it to pop

 

Yeah, well I changed my BOV to vent to atmosphere this morning... went for a drive, came back, and immediately changed it back to recirc. The PFFsssshhhhh sound is cool, but the cacophonous gunshot backfires and fireballs EVERY time I throttled off is just too obnoxious. Also the throttle response was noticably worse and I just can't bring myself to trade performance for sound. I am interested in a new type of BOV though, I was looking through mysql's videos on YouTube and saw he was really happy with his Syncronic BOV. Anybody else used them?

 

/\ get one of those gadgets that makes the fake psssst sound and leave it on recirc . Best of both worlds LOL

 

Will returbo in the spring, and maybe let someone else tune it this time.....


who tuned it?

Nobody here, it was my own stupid fault, no doubt about that.

S

 

/\ sorry to hear that S. You have not had a happy Fi experience from what I gather ...

 

Thanks B.

On the upside, I have a shiny fresh BNR snail ready for my install!

When guys at work ask is it fixed yet, the obvious second question is "are you going to turbo it again?" to which the answer is

" Yes, but this time I have a bigger turbo."

Doesn't sound sane when you write it out, does it.......

 

I have the Synapse Syncronic BOV... and I swear by it.

 

I have the Greddy RS VTA and it used to backfire and have fireballs everytime I would ever get on it then let off the throttle. Then seriously Kane came up here and tuned the car and it stopped. No joke..But I will be switching over to Synapse Syncronic BOV here soon. Kane talked me into it when he was up here. Although I would like to try out the Turbosmart Megasonic or Supersonic.

 

HKS SSQV VTA > any GReddy BOV VTA...

As far as synchronic, that's Kane's specialty

I am happy with my HKS however vented to atmosphere. I recirc'd it just for fun and didn't notice much difference besides the lack of backfires.