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12-22-2009, 11:52 PM | #1 |
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Valve Job Question
I have a question on valve jobs, since they opened up the rules last year. I know you can basically do anything to the valve. My question is what can you do to the seat, like how far can you take the bottom cut into the bowl area. I know you need to watch out and make sure your heads will still pour the cc's. Any input would be welcomed, just looking for the .3 I lost
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Alan Warman STK 4107 |
12-23-2009, 11:45 PM | #2 |
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Re: Valve Job Question
So 324 hits but no info, is it top secret or classified. Or I am just that far off base.
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Alan Warman STK 4107 |
12-24-2009, 12:27 AM | #3 |
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Re: Valve Job Question
Try this: http://www.potseeds.co.uk/highs/no2.html
That might help get the .30 back. :~)
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Adger Smith (Former SS) |
12-24-2009, 12:37 AM | #4 |
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Re: Valve Job Question
Man that's just wrong Adger (LOL). But I did give it try now I am .50 behind and 20lb over weight.
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Alan Warman STK 4107 Last edited by Alan Warman; 12-24-2009 at 12:40 AM. |
12-24-2009, 07:25 AM | #5 |
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Re: Valve Job Question
I was going to reply yesterday but I'm not sure I can answer correctly,I was told you can cut the bowl area down to guide area any angles but I would double check before I did anything.
Mike Taylor 3601 |
12-24-2009, 09:04 AM | #6 |
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Re: Valve Job Question
Everything you do to the valve seat or the bowl must be concentric to the valve guide. There is no written limit as to how deep you can go, or how many angles you can use. Be aware you can cause yourself problems with runner volume on certain heads. And use common sense with regarding to how deep you go, because I don't think they'll go for 5/8" or 3/4" deep and cutting around the valve guide.
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Alan Roehrich 212A G/S |
12-24-2009, 05:32 PM | #7 |
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Re: Valve Job Question
like alan said any cut and depth concentric to guide. however if cc is not a issue and you have access to a flow bench do some r/d with the bowl hawg and see what happens you may be surprised as you may lose some low .2 .3 numbers and pick up around .4 .45 lift about out of the lift range of a stock cam however the flow bench is not the engine and ive seen some heads bowlhawged to death with horrible low .2 .3 flow # and still run fast . however stock is a free for all now and youre chances of being tossed out of tech slim you have a better chance at getting bounced if youre heads are too stock. merry christmas.
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