In a 1999 rs, what actually happens when you blow a MAF? I hear about it on here all the time, but there is no real detail about what happens, mostly it just says that it happens.

Because I would love to put an intake on my99 but if its gonna be something serious, i will def stay away from it.

 

The car runs absolutely horribly. You would know very quickly if you had MAF problems. That's a very good reason not to run an intake on a MAF car, aside from the fact they don't make power when you have other mods, particularly some form of engine management.

 

Is there some way to get around it, like replacing the MAF with a the sensor from a 2000-2001???.. just wondering

 

It's far too complicated to justify changing over your entire ECU just to run an intake. You'll get more power out of headers, cat, and exhaust anyway.

 

Dirk, Ban dosn't know what he's talking about. I have a 99' and you'll be fine with an intake as long as you got the new maf from the recall. I always take my vents and scoop off and I'm fine. I just put the vent that's over the intake on as soon as it starts to rain.

And yes the intake does give you power. I've had a weapon r intake since I bought my car 2 years ago and it's great. When I tore up my apexi exhaust in a snow storm I had to put on the stock exhaust untill I could afford a new one. So I raced my friend whith his stock 01' to see how the intake did. I pulled on him everytime. We even did races from rolls and in different gears and I got the same results. So it obviously does something.

 

I wouldn't say Kevin doesn't know what he's talking about. SAFC + intake is a nice combo on a 99. You don't HAVE to have a SAFC, but I wouldn't run one without it. As for the MAF issue, just make sure you buy the right kind of intake. A cheapo ebay deal is a risky waste of money. Try a modded Cobb or an Injen. My $.02.

JC

 

Rather than get into the internet special olympics here about who knows wht, i'll just point out the fact that i know how to spell "doesn't." I, along with manyothers who know more than me, have long since made our cases about why MAF EJ25s don't benefit from intakes.

 

Holy crap, I spelled a word wrong!!! Guess that means that you know everything and I'm an idiot. So now tell me this. A catback exhaust really DOESN'T give you much power either, so why can I kill at stock subie?

 

Let's get back on topic, shall we? Dirk asked what actually happens when you blow a MAF. I told him. It has nothing to do with having or not having an intake, it has to do with the crap MAF that 99s came from the factory with. I do not recommend intakes on MAF EJ25s because they can have detrimental effects on the engine due to the MAF sensor being thrown out of calibration. Furthermore, open air elements under the hood always lose midrange torque without at least an AFC to compensate for the MAF signal being wrong. Rumor has it that it helps gain 2-3 hp up top. Personally, I doubt this as my car made more hp on the dyno with my Ganzflow installed and the hood open than it did with no snorkel past the airbox and the hood open. If drawing air from the fender on my car made more power than an open airbox, how is a cone filter in the immediate vicinity of your radiator discharge making you faster? This is why I tell people not to put intakes on their RS, especially MAF cars. I realy don't care how many times your car beat your friends car due to the variances between engines, drivetrain loss, effective gearing from tires, driver differences, etc.
Now, if you having anything further to add to the original question, then please post it. If you just want to continue this stupid flame war which is of no consequence to anyone, take it to email, so that I am the only one who is inconvenienced by having to delete it.

 

Yes I know what the original question is, but also he said he wants to get one for his car and you're making it sound like intakes are the devil. Do you even have a maf Impreza? Just curious.

Well anyway before Ban gets bent out of shape I have a 99' and so does one of my good friends. We both blew 2 sensors. Mine was from following my friend on a dirt road with the vents and scoop open, and the other time it just went on me. About 3 months later the recall happend. Since then I've had absolutly no problems. My friends one just went on him, then the recall happened, then he left his vents opened during a crazy rain storm and he went driving with a soaked air filter the next day.

There is also no problems that occur from this. I may run a little rich but that's about it. It doesn't mess up my maf sensor.

Ban I don't get what you're saying. So you're saying that that there if there is a bug that hits my friends windsheild while we are racing that could be the leading factor into me winning the race? I mean come on the difference from the tread on our tire is not going to make that big of a difference on me pulling on my friend. It wasn't just me barely winning. I understand the "different factors" involved but there aren't that many to actually make a difference. And just so you know we only bought our SO3's 1k miles appart and drive about the same distance everyweek so they are almost the same.

 

Actually it runs lean. That's why I said I wouldn't run one without an S-AFC. MAP cars run rich, MAF cars run lean. You will gain quite a bit more hp if you can richen the car a touch up at the top end. There are dyno results and such in the SCC Project RS. Regardless, Weapon *R is an awful intake, you really should pony up the cash for an Injen cold air.

JC