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58mm TURBO INTAKE... OR 76mm ???

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Old 30 July 2009, 01:00 PM
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joz8968
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Exclamation 58mm TURBO INTAKE... OR 76mm ???

At what sort of power levels, etc. does a 76mm turbo intake become NECESSARY, instead of an OEM-sized 58mm one?
Old 30 July 2009, 05:46 PM
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dunx
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I'd say over 450 bhp...

Just a guess really.

dunx
Old 30 July 2009, 10:23 PM
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joz8968
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Cheers. Yeah, I would've said 450-500 as an educated guess.

Anyone else?
Old 30 July 2009, 10:27 PM
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wrighty338
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md turbos are the biggers ones arnt they, and we all know what kinda figures they make
Old 30 July 2009, 10:31 PM
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joz8968
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Originally Posted by wrighty338
md turbos are the biggers ones arnt they, and we all know what kinda figures they make
Lateral offer them in either 58 or 76mm... so not all MDs out there will have 76mm intakes.
Old 30 July 2009, 10:50 PM
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Anger
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Ive got a 58mm MD321T and just made 450.5bhp with 410lbs/ft
Old 30 July 2009, 11:08 PM
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joz8968
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Originally Posted by Anger
Ive got a 58mm MD321T and just made 450.5bhp with 410lbs/ft
Cool

Looks like a 76mm is only really required for big power or, say, to produce the goods on a 2.5....

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Old 31 July 2009, 12:04 AM
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dunx
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The 2.5 can only consume so much air.... 2.0 just needs more revs to match it !

LOL

dunx
Old 31 July 2009, 12:28 AM
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joz8968
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Indeed.
Old 31 July 2009, 11:49 AM
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STiFreak
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I was advised by Mark to go with a 58mm intake on a 321T (which will be running around the 450bhp mark). Can't remember what reason he gave, but it made perfect sense at the time.
Old 31 July 2009, 11:53 AM
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Stevesbluewrx
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I'm running the 58mm on mine with the standard intake pipe.

Steve
Old 31 July 2009, 12:30 PM
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joz8968
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Originally Posted by STiFreak
I was advised by Mark to go with a 58mm intake on a 321T (which will be running around the 450bhp mark). Can't remember what reason he gave, but it made perfect sense at the time.
I read somewhere that unless absolutely necessary for the horsepower aimed for, then don't run a 76mm intake, as it could promote compressor surge.

So only go 76mm if absolutely required.
Old 31 July 2009, 04:52 PM
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dunx
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Or when you get to 600 bhp ?

LOL

dunx
Old 31 July 2009, 04:58 PM
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Originally Posted by dunx
Or when you get to 600 bhp ?

LOL

dunx
That's right - 76mm only required for BIIIG power it seems.
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