MR2 Roadster Owners Club

The Workshop => Performance Related => Topic started by: stchris356 on July 21, 2017, 14:20

Title: Quiet at work, so I made this from a second hand air filter box off eBay!
Post by: stchris356 on July 21, 2017, 14:20
With the help of a Bremel [emoji16] (https://uploads.tapatalk-cdn.com/20170721/95bd759e006ccb091ae37052a94dec93.jpg)(https://uploads.tapatalk-cdn.com/20170721/b1d6964ab1f1b052e102cb9424eb71be.jpg)(https://uploads.tapatalk-cdn.com/20170721/cae7b6d61f58308041fc9b7d71684b1f.jpg)

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Title: Re: Quiet at work, so I made this from a second hand air filter box off eBay!
Post by: The Other Stu on July 21, 2017, 16:04
I'm afraid there's a "but" here.
It'll have the same problem as my expensive eliseparts one.
The box also has a couple of bits of plastic that direct the airflow over the MAF. Without them, the car will sound like it's struggling for breath.
Here's a dissection. They're called "vanes" apparently
(https://i.imgur.com/SpGpGgs.jpg)
Title: Re: Quiet at work, so I made this from a second hand air filter box off eBay!
Post by: m1tch on July 21, 2017, 18:09
I was about to say that I had cut up my spare airbox but was VERY careful to retain the OEM velocity stack and vanes otherwise the airflow is too turbulent around the MAF, I am afraid to say that you might have just junked the MAF tube.
Title: Re: Quiet at work, so I made this from a second hand air filter box off eBay!
Post by: shnazzle on July 21, 2017, 18:17
Arguably you could make sure that there's enough straight pipe on both sides before bending onto the throttle body. That should be enough to straighten up the airflow.
So possibly not a lost cause

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Title: Re: Quiet at work, so I made this from a second hand air filter box off eBay!
Post by: stchris356 on July 21, 2017, 21:21
I fitted it this evening and went for a decent run,  to be fair I can't say I noticed any drop in performance  and it sounds pretty good  at about 4500 rpm !

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Title: Re: Quiet at work, so I made this from a second hand air filter box off eBay!
Post by: shnazzle on July 21, 2017, 22:26
It certainly does! Where did you fit the filter? Just straight from the throttle body and behind the battery?

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Title: Re: Quiet at work, so I made this from a second hand air filter box off eBay!
Post by: stchris356 on July 22, 2017, 11:44
At the moment as low down as possible behind the heat shield where the filter box was.
I've ordered a K&N and a longer pipe so I can run down behind the battery as near to the air scoop as possible.

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