Big Valves
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Big Valves
Can larger valves be used without replacing valve seats? If so how much larger (silver top Zetec I=32mm E=28mm)?
What kind of price can I expect to pay to have valve seats replaced?
Rich.
What kind of price can I expect to pay to have valve seats replaced?
Rich.
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Joined: Jul 2006
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From: uk
NO & LOTS!!
Larger valves need larger seats for them to work, they work by offerring more airflow potential, and they will cost a bit to get in, as have to be cut in, IF THERE IS ENOUGH MEAT on the head!!
tabetha
Larger valves need larger seats for them to work, they work by offerring more airflow potential, and they will cost a bit to get in, as have to be cut in, IF THERE IS ENOUGH MEAT on the head!!
tabetha
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Joined: Sep 2006
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From: Lithuania (whereTF is that?) :)
I wouldn't say so... I've just fitted one millimeter larger valves into my CVH head... the seats themselves were machined by 2 mm.... I'd say it depends on the head you are doing. From my experience it can be done on CVH... don't know about zetec 
PassionFord Regular
Joined: Sep 2006
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From: Lithuania (whereTF is that?) :)
Originally Posted by tabetha
Is there any point in 1mm larger though for the cost ?
tabetha
tabetha
as standard unmoded zetec head would flow more air then big valve CVH 
But still every bit gives you gain in power (I'll use it on 2.0 bottom, so I needed better flowing head)
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