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Old 12-15-2004, 05:24 PM   #1
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Default Oversize Valves

are oversize intake valves worth it, some people say "not unless your 600hp" others say yes..

whats the deal.
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Old 12-15-2004, 05:28 PM   #2
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Default Re: Oversize Valves (shortyz)

Shorty'z whats up? I too am curious to know. I've been working on building up a head for FI and just got a set of SS valves in standard size. Wondering how much of a difference larger valves will make and what type of machine work needs to be done to the head in order to fit them.
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Old 12-15-2004, 05:34 PM   #3
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Default Re: Oversize Valves (Trance minister)

Quote:
Originally Posted by Trance minister
Shorty'z whats up? I too am curious to know. I've been working on building up a head for FI and just got a set of SS valves in standard size. Wondering how much of a difference larger valves will make and what type of machine work needs to be done to the head in order to fit them.
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Old 12-15-2004, 06:47 PM   #4
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Default Re: Oversize Valves (shortyz)

Bump this up for some wanted info
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Old 12-15-2004, 08:08 PM   #5
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Default Re: Oversize Valves (Trance minister)

earlllllllllllllllll please help us..
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Old 12-15-2004, 08:08 PM   #6
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Default Re: Oversize Valves (Trance minister)

bump it up again cause im in the middle of gettin my head ported and wanting to know if bigger vavles are better also...
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Old 12-15-2004, 08:24 PM   #7
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Default Re: Oversize Valves (B20luda)

as far as i have found, P&P and most headwork, besides maybe cames, will not give a whole lot of gain until your running alot of HP
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Old 12-15-2004, 08:35 PM   #8
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Default

the best head improvement for flow is a valve job, making the air miss the valves better will yield more power than an oversived valve
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Old 12-15-2004, 08:44 PM   #9
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Default Re: (z6)

oversizing valves helps, esp. w/boost... intake valves mostly, exhaust is not necsry. Click the image to open in full size.
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Old 12-15-2004, 09:24 PM   #10
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Default Re: (TurboHybridEG6)

In general terms, a .5mm oversized valve is good for about 10 cfm more flow over the stock size when everything else remains equal.
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Old 12-16-2004, 09:23 PM   #11
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thank you earl
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Old 12-17-2004, 07:52 PM   #12
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Default Re: (PrettyLude)

is this 10cfm at idle, or at full throttle?


Modified by shortyz at 9:07 PM 12/17/2004
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