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AZGhost623
https://forums.nicoclub.com/memberlist.php?mode=viewprofile&u=113&sid=48c1cddbacb240c6390cda73ca56ecc0
performance valve train question
Thu Jul 09, 2015 7:03 pm
performance valve train question
A forum for owners of S30 and S130 Datsun Z's... 240Z, 260Z, 280Z and 280ZX!
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AZGhost623
- Posts: 2
- Joined: Fri Mar 20, 2015 12:37 pm
- Car: 1976 280Z
performance valve train question
Post by AZGhost623 » https://forums.nicoclub.com/azghost623-u249485.html Thu Jul 09, 2015 7:03 pm
Just out of curiosity sake, why are the big performance valves (46mm intake/ 38mm exhaust) 117-119mm when the stock valves are 114-115mm in length? I am assuming that the longer valves allow for a more beefier/taller spring to handle more higher rev's? Is that the case? 3mm is quite a difference in length...
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