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Old 07-09-2009, 08:14 AM   #1 (permalink)
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Default Forged Valves worth it??

I am building my D16Z6 to make roughly 300 to 350 hp. One of the things I am installing is supertech springs and retainers. Is it worth while to install forged valves with them if I am running the stock valve size? Do you think larger valves are needed to hit the 350 mark? This will be a street car on pump gas. What do you all think???
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Old 07-09-2009, 08:15 AM   #2 (permalink)
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i dont know the answer to your question but i assume the car is a civic wagon?
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Old 07-09-2009, 08:15 AM   #3 (permalink)
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No.
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Old 07-09-2009, 08:17 AM   #4 (permalink)
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The stock head can make about 400hp but any upgrades you want to do will make your goal easier to reach.
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Old 07-09-2009, 08:33 AM   #5 (permalink)
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On 98% of the D-series heads out there oversized valves are not an added benefit. Stock valves will tend to bend if contact is made, while forged will just break off. Other than some of the fordged ones coming with a nitrate coating, that's about all the advantages. I've not heard of anyone weighing the difference.
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Old 07-09-2009, 09:28 AM   #6 (permalink)
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You will be fine with stockers save your money
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Old 07-27-2009, 01:28 PM   #7 (permalink)
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Hey Everyone,

Thank you for the info! I did not realize that the stock head could make up to 400 hp. It only makes sense as that appears to be the cut off for the block too. I was thinking about supertech springs and retainers, but maybe I should rethink that thought??? Should I pass on them and focus on other things?
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Old 07-27-2009, 02:00 PM   #8 (permalink)
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Originally Posted by Blackwagonman View Post
Hey Everyone,

Thank you for the info! I did not realize that the stock head could make up to 400 hp. It only makes sense as that appears to be the cut off for the block too. I was thinking about supertech springs and retainers, but maybe I should rethink that thought??? Should I pass on them and focus on other things?
any head work will make your goal of 350 whp easier so id recommend upgrading the head parts just to make it easier
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Old 07-27-2009, 02:02 PM   #9 (permalink)
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go for springs/retainers, this will help you to keep everything together revving high.
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