Move MAF or Recirc 100%?

[Bakum]

It's working now. I know my Vaccum source is overloaded, but I haven't ordered a Brake Booster kit yet, so its gonna stay that way. There was definatly something wrong with it though because it was stuck closed. I took off the vaccum hoses and replaced them with new ones cause i think there was a small leak im thinking. Sounds great now. I love it. thanks for the input tho.

 

[tallrd]

It's working now. I know my Vaccum source is overloaded, but I haven't ordered a Brake Booster kit yet, so its gonna stay that way. There was definatly something wrong with it though because it was stuck closed. I took off the vaccum hoses and replaced them with new ones cause i think there was a small leak im thinking. Sounds great now. I love it. thanks for the input tho.

well, at least I can feel reassured that it was indeed the vacuum source. Glad you were able to fix it.

 

[Bakum]

I am going to make my vaccum more efficient soon, but haven't had the time to yet. I have the stock bpv, hks, and a boost guage, all on one source "T'd" off all over the place. Once I get the Brake Booster line Setup, I'll set the HKS to BB and keep the Stock BPV and Boost Gauge on the same line.

 

[speedcicle]

I`m recirculating a greedy s-type after venting for 2 years.Turkey is loud as hell and i love it! . VIVA EL TURKEY.

Turkey is bad.........

 

[Kansei]

*subscribes* so that I remember to use a dedicated vac source for my BOV

 

[MSP_4_CODY]

move that maf!!! i did i love it!

 

[Alejo_NIN]

move the holy maf

recir sucks ass...turkey is ghey

 

[Kansei]

move the holy maf

recir sucks ass...turkey is ghey

there's no issue at all with the MAF being in the charge pipe.. like longevity or something? I don't see why mazda wouldn't have put it their themselves if there wasn't a downside.

 

[snowblazin]

there's no issue at all with the MAF being in the charge pipe.. like longevity or something? I don't see why mazda wouldn't have put it their themselves if there wasn't a downside.

Nope. Best thing I did while I had the turbo. Car never stalled again or had any idling problems. Seems Mazda likes to do everything the hard way.

 

[Brian MP5T]

there's no issue at all with the MAF being in the charge pipe.. like longevity or something? I don't see why Mazda wouldn't have put it their themselves if there wasn't a downside.

It was not designed to read charge air.

It is calibrated to read air at ambient pressure. It does this by calculating flow based on the speed of the air. It knows how big the hole is and can calculate how many CF/M the car in ingesting. There is no way for a MAF to see the difference between Boosted Charge or Normal Charge so basically when there is pressure in the MAF, more air is getting in than it can see.

The car will run a bit leaner under boost, which under most conditions so a positive thing simply because the car runs very rich to begin with.

MAP Sensors are the best way to calculate Air

 

[Kansei]

Good point. I always forget that pressurized means more air in the same space. I was just worried about the rush of pressurized air past the delicate little MAF sensor causing a problem.

 

[Yellow MSP]

It was not designed to read charge air.

It is calibrated to read air at ambient pressure. It does this by calculating flow based on the speed of the air. It knows how big the hole is and can calculate how many CF/M the car in ingesting. There is no way for a MAF to see the difference between Boosted Charge or Normal Charge so basically when there is pressure in the MAF, more air is getting in than it can see.

The car will run a bit leaner under boost, which under most conditions so a positive thing simply because the car runs very rich to begin with.

MAP Sensors are the best way to calculate Air

I use a GM MAS on my GSX which sees 23 PSI daily and the only problem I have ever had with it was when water got into my intercooler. I'm not 100% sure of how it works (calculates air) but I imagine it has to be very close to the same design of the MSP. And the one I use came off an N/A vehicle as well. So basically, if it can handle 20+ psi accurately, I see no reason why the MSP MAS can't read 6-12 PSI with good accuracy.

I agree that MAP sensors are definitely the way to go. I wish I could afford AEM for my vehicles.

Finally, I just got my stock MSP a month ago, and what do you know, the MAS is sh*tting the bed. Luckily the dealer is covering the cost of a new one.