Greddy installed today, mucho compressor surge? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 02-19-2008, 08:45 PM   #1
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Default Greddy installed today, mucho compressor surge?

After lurking on this forum and plotting for the past 12 months, I finally fitted a (used) Greddy kit to my '91 today. I've not driven it hard so far, in fact I've not been beyond 4500rpm, but I'm surprised by the amount of compressor surge I can hear. It's running stock boost, is this normal? If so, where do I plumb in a bypass valve (remember I'm using the stock plastic trunking)?

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Old 02-19-2008, 08:53 PM   #2
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So you are not running a bov of any kind?
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Old 02-19-2008, 08:54 PM   #3
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Yes that is normal. All turbos will surge without a bypass valve. You can install a bosch recirc valve on the intake tube, anywhere and recirc it after the AFM.

Go forth and search to find example pictures.
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Old 02-19-2008, 09:53 PM   #4
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http://www.etdracing.com/miatatube.html

on the expensive side, but solved all of my problems while i wait to install front mount
its too cold to do it now, and its allways snowing and raining,
this thing works great and install time was about 3 minutes, in freezing weather
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Old 02-19-2008, 09:57 PM   #5
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yeah you could get something like likesmennknowsit or simply a cheap $20 bosch/dsm BOV
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Old 02-19-2008, 09:57 PM   #6
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here how mine looks

DSCF3229.jpg
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Old 02-19-2008, 09:59 PM   #7
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Quote:
Originally Posted by urgaynknowit View Post
here how mine looks

do you have any sort of MS? that is VTA right?
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Old 02-19-2008, 10:05 PM   #8
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no ms, i thought car would idle funny or die after blow off seeing as metered air was being let out


and nothing.....

car runs and drives as stock, untill boost that is
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Old 02-19-2008, 11:07 PM   #9
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Quote:
Originally Posted by mazda/nissan View Post
do you have any sort of MS? that is VTA right?

If the BOV is sealed tight, he won't suffer any idling problem. The only down side is an rich shift point.
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Old 02-19-2008, 11:43 PM   #10
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What brand is the bov? turbosmart? I think you can get attachments on ebay or something with the necessary flange for 20 bucks or something.
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Old 02-20-2008, 06:06 AM   #11
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im sure that crossover comes with the turbosmart bov already installed
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Old 02-20-2008, 09:40 PM   #12
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phat as
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Old 02-20-2008, 11:57 PM   #13
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yes, the cross over came with bov, and everything needed to install
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