Well I have been looking into making my own cold side intake lately. I know i could just go online and pick up a specifically made 90 degree elbow, breather cap, air filter and be done with it. But whats the fun in that? I thought I'd head out to the hardware store and see what I could find to help in making a budget intake. Well after finding out that LOWS doesn't realize that there's such a thing as 2.5quot; tubing, I gave up on the intake for the moment and headed across the street to walmart to find a cup holder solution (wich I did) and pick up some red paint for painting calipers. While wandering around in the auto section i noticed a small fram fuel filter and got an idea.
I figured that there had to be some way to make it into a breather cap with a bunch of messing around with it. And i was wrong. It was actually amazingly easy. All that was needed was to cut off the the plastic housing. I did however add a ring of glue around the base to keep it secure, but that was litterally it. Here's what it looked like before.
And I've attached pictures of what it looked like afterwords. Also, at my walmart there were 2 fuel filters. They were the same price and looked like the same filter but the Fram G2 came with 2 tubes and 4 clamps.
Anyways, now for the scrutizing, any ideas why this wouldnt work? Also, any ideas where to find some kind of a 2.5quot; 90 degree elbow? I know I could hack up my stock intake but I'd much rather not have to do that.
For some reason i can't edit my post, anyways, I forgot to mention...
Total price: $1.96
Okay, so now you're allowing un-metered air into intake chamber.
What do you mean un metered? Like not going through the maf or whatever its called? Thats how all breather caps are.
Originally Posted by Golferluke
What do you mean un metered? Like not going through the maf or whatever its called? Thats how all breather caps are.
For the crankcase ventilation sysem the intake is on the driver's side where your breather filter is, the outflow is the PCV valve on the passenger side. The air flow is created by vacuum created by the intake manifold. Mazda designed the system to be metered though the MAF via the tube you removed. All thing working properly, the engine will run lean with your filter in place, because the ECU will see less air than it is actually getting.
... how is the engine getting un-metered air?
Im assuming he blocked off the hole in the crossover tube
The engine is designed to pull that air back through the intake. It looks cool but you are not doing you engine any good unless your are running IRTB's and that's a whole other story.
Originally Posted by 31337
... how is the engine getting un-metered air?
Im assuming he blocked off the hole in the crossover tube
Look at where the vacuum source is in OEM form. That's an inlet not an outlet, it's connected to the intake path, behind the MAF. Therefore, when the motor is idling or under low vacuum cruising, air will flow through the breather port into the crankcase and back through the intake manifold. Now that it's open to the atmosphere and the air is not metered.
I'm surprised about how many of you out there have no clue how the most simple things in your engine bay work.
I made the thread to see if there was a problem with my design, not to argue with people about using a breather cap. you guys do realize that there's no sensor or anything on the hose this is replacing, its just a straight tube from the intake crossover to the engine. sure its behind the maf but the maf has no idea how much is going through the tube. So when I put a cold side intake on and move the maf, it will still think that nothing has changed.
Also you do understand that I just put it on for the picture and don't use it like that. I didn't just take off the hose and put it aside.
Originally Posted by Golferluke
...you guys do realize that there's no sensor or anything on the hose this is replacing, its just a straight tube from the intake crossover to the engine. sure its behind the maf but the maf has no idea how much is going through the tube.
You need to rethink this.
I'll make it easy: |
Post at 2-7 07:32 AM
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