MAF location???

[fliprayzin240sx]

Well reason you need a tune is because the ECU is calibrated a certain way. It takes the signal a certain amount of time to get to the ECU, process that data and then make the fuel correction in according to the air coming into the engine. Now that the maf is closer to the TB, the ECU doesnt have the same amount of time to process that data and make that correction. This is where tuning comes to play to make up for it. Theres a certain distance that the maf have to be from the TB whre the ECU can still compensate for it, just cant remember the distance exactly.

Anyways people already stated the issues that you can run into running a blow thru setup. The other thing that nobody has brought up is the chance that if your turbo goes doo-doo and starts spitting oil into the charged side, theres a good chance that the oil will fuck up your maf too. So keep that in mind.

[GSXRJJordan]

Originally Posted by fliprayzin240sx

... if your turbo goes doo-doo and starts spitting oil into the charged side, theres a good chance that the oil will fuck up your maf too. So keep that in mind.

That's exactly right. Turbos blow oil, it's what they do. To a certain extent, it's healthy (just talk to your local rotary tuner). MAFS' hate oil.

The other thing is that MAFS are generally not 3" diameter, like most coldpipes. Hotpipes are smaller diameter because you want the air to move quickly to the intercooler, then slow down to get cooled, then have a nice relaxing trip in to the throttle body. Extra speed bumps are not ideal.

If you're getting a standalone to tune for your blow-through MAF, just go MAP. If you're just gonna get an AFC, no data logging, and hope for the best, at least you're staying cost effective...