I originally picked up a BOMZ WAI off of ebay and installed it with only needint to make a few modifications to the adapter bracket for the MAF sensor.
After I installed it my car was running like **** though and the mileage was about half. So I left it on for a week and babied it but it only got a little better so I took it out and really compared the 2. I noticed that the 2 bigger lines coming off of it the vacuum line and the other one were about half the diameter of the stock one. So I put the stock one back in and left the filter on it. I then pinched the vacuum lines and noticed that it made the idle dropped and figured that was the problem.
So anyway I spent a few months driving around with the WAI filter on the stock piping and it worked pretty good but my mileage was still not quite as good as stock but I was getting power gains so I wasn't to worried about it. However I'm never satisfied so I put everything stock back on and drove it for about a month like that. Everything power, and mileage was back to normal, boring normal.
Anyway so last week I was annoyed and the weather up here in canada was pretty good so I felt like tinkering again and put the WAI filter back on the stock tubing. But this time, thanks to advice on here, I flipped the MAF upside down. Holy **** did that make a difference. Mileage with the WAI filter on is better then total stock and the but dyno is definitely reading higher then with the MAF the normal way.
Next thing I'm going to do is take the tube I got off ebay and put the propper size tube lines off it and put that back in and see what kind of difference 3" of smooth piping will make.
So basically what I'm saying anyone that put a WAI and is wondering why their mileage is gone to ****, first flip your MAF if you haven't and second make sure that all the lines coming out of the intake tube are the same diamter as your stock one was/is.
After I installed it my car was running like **** though and the mileage was about half. So I left it on for a week and babied it but it only got a little better so I took it out and really compared the 2. I noticed that the 2 bigger lines coming off of it the vacuum line and the other one were about half the diameter of the stock one. So I put the stock one back in and left the filter on it. I then pinched the vacuum lines and noticed that it made the idle dropped and figured that was the problem.
So anyway I spent a few months driving around with the WAI filter on the stock piping and it worked pretty good but my mileage was still not quite as good as stock but I was getting power gains so I wasn't to worried about it. However I'm never satisfied so I put everything stock back on and drove it for about a month like that. Everything power, and mileage was back to normal, boring normal.
Anyway so last week I was annoyed and the weather up here in canada was pretty good so I felt like tinkering again and put the WAI filter back on the stock tubing. But this time, thanks to advice on here, I flipped the MAF upside down. Holy **** did that make a difference. Mileage with the WAI filter on is better then total stock and the but dyno is definitely reading higher then with the MAF the normal way.
Next thing I'm going to do is take the tube I got off ebay and put the propper size tube lines off it and put that back in and see what kind of difference 3" of smooth piping will make.
So basically what I'm saying anyone that put a WAI and is wondering why their mileage is gone to ****, first flip your MAF if you haven't and second make sure that all the lines coming out of the intake tube are the same diamter as your stock one was/is.