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Old 09-24-2009, 05:40 AM   #1 (permalink)
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Stock Vs. Tomei BOV Vs. Others?

Hey all,

Im new to this forum, i got a Evo VI imported from Japan about 2 months ago (been so much fun!). The car is 100% stock... nothing changed... even the exhaust hasnt been replaced which I found pretty rare.

Ive started reading up about the evo's, theres a bit of talk about the stock BOV leaking under boost. Im thinking of keeping the evo fairly stock (or at least able to be returned to stock) so i was thinking of getting a Tomei BOV since it seems to be a straight bolt in.

Has any one used the Tomei BOV? form what i have read it can take up to 25psi but does that make it too strong for stock boost levels?

Would any one strongly recommend any other BOV?


On a side note, has any one changed the stock air filter to K&N and seem any noticable differnce?
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Old 09-29-2009, 07:07 AM   #2 (permalink)
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If youre going to keep the Evo fairly stock, I would just go with the Evo MR JDM BOV.
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Old 10-01-2009, 09:04 AM   #3 (permalink)
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K&N filters always make some difference. Whether you will notice anything beyond sound depends. Top end is usually better with a K&N for some reason, like exiting onto a highway and stuff. I have had great luck with K&N filters, even the drop ins.

Nadeem
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Old 10-01-2009, 11:10 AM   #4 (permalink)
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the tomei is almost identical to the Evo IX BOV. You will not gain alot from a drop in filter, and if i was doing a drop in filter i would useone that is dry and made of foam. easy to clean last a long time and it wont gunk up the MAFS...


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Old 10-02-2009, 07:35 AM   #5 (permalink)
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I bought a K&N and it should arrive any day, a drop in replacment for stock. I took the last bit of the stock air box off... on the evo 6 the intake is directed towards the engine sucking up hot air and there is plate which blocks the cold air coming up from the front bar, horrible design.

So should be getting a lot more cold air to the air box now (hopefully not too much crap with it) and less pressure drop across the filter.

in terms of a BOV, ive still be looking around in particular at the adjustable ones with a 50/50 split. does this still screw with MAF?
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Old 10-02-2009, 10:36 AM   #6 (permalink)
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just get one that totally recircs so you dont have any driveability or running real rich issues. You can still hear it if that is your concern, you can hear them alot with just a intake.


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Old 10-09-2009, 12:59 PM   #7 (permalink)
 
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Is there a difference between the Evo IX BOV and the Evo IX MR BOV?
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Old 10-09-2009, 01:08 PM   #8 (permalink)
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no and the JDM one is the same too!


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